阅读说明：本技术 装饰构件及其制造方法 (Decorative member and method for manufacturing same ) 是由 宋真淑 韩尚澈 金容赞 许南瑟雅 孙政佑 曹弼盛 于 2019-01-08 设计创作，主要内容包括：本申请涉及一种装饰构件,包括基板和设置在基板上的装饰层,其中,由式1表示的深度参数值δ<Sub>1m</Sub>为0.15以上。(The present application relates to a decorative member comprising a substrate and a decorative layer provided on the substrate, wherein a depth parameter value represented by formula 1 1m Is 0.15 or more.)

1. A trim member comprising:

a substrate; and

a decorative layer disposed on the substrate,

wherein, when a direction perpendicular to a plane of the decoration layer is defined as an x-axis, a direction on a surface of the decoration layer is defined as a y-axis, and a center point of a width of the y-axis on the decoration layer is detected using a detector under a condition of a standard light source D65 in a wavelength range of 380nm ≦ λ ≦ 780nm, an angle formed by a line connecting a center of the detector and the center point of the width of the y-axis on the decoration layer on an x-y axis plane and the x-axis is defined as a central viewing angleA distance from the center of the detector to the center point of the width in a y-axis direction on the decorative layer is defined as Dv, and the center viewing angle is from-15 ° to +15 °Is represented by the following formula 1_1mIs 0.15 or more:

[ formula 1]

_1m＝|Δh|max/D_v

Where | Δ h | max is the maximum value of Δ h represented by the following formula 2:

[ formula 2]

Wherein Δ d is represented by the following formula 3:

[ formula 3]

Wherein the content of the first and second substances,

a viewing angle formed with the x-axis on the x-y axis plane by a line connecting the center of the detector and any point on the y-axis on the decorative layer detected by the detector; and is

Andrepresented by the following formula 4 and the following formula 5, respectively:

[ formula 4]

[ formula 5]

Wherein the content of the first and second substances,andrespectively at the viewing angle Andthe brightness of the lower corner of the strip,

wherein, in the formula 2,a range satisfying the following formula 6:

[ formula 6]

Wherein the content of the first and second substances,andare respectivelyMinimum and maximum values of.

2. The trim member of claim 1 wherein the central viewing angle is from-15 ° to +15 °Of (a), a depth parameter value represented by the following formula 11_1bIs more than 3:

[ formula 11]

_1b＝|Δh’|max/Dv

Where, | Δ h '| max is the maximum value of Δ h' represented by the following formula 12:

[ formula 12]

Wherein Δ d' is represented by the following formula 13:

[ formula 13]

Wherein the content of the first and second substances,

anddue to arrival at a viewing angle from the detectorAnda distance identified by a difference in angular brightness of one point on the decoration layer identified below, and represented by the following formula 14 and the following formula 15, respectively:

[ formula 14]

[ formula 15]

Wherein the content of the first and second substances,andrespectively at the viewing angleAndangular brightness of the lower corner.

3. The trim member of claim 1 wherein the central viewing angle is from-15 ° to +15 °Of (a), a depth parameter value represented by the following formula 21₂Is 0.3 or more:

[ formula 21]

₂＝|Δd’|max/D_v

Where, | Δ d '| max is the maximum value of Δ d' represented by formula 13.

[ formula 13]

Wherein the content of the first and second substances,

due to arrival at a viewing angle from the detectorAnd a distance identified by a difference in angular brightness of one point on the decoration layer identified below, and represented by the following equations 14 and 15, respectively:

[ formula 14]

[ formula 15]

Wherein the content of the first and second substances,andrespectively at the viewing angleAndangular brightness of the lower corner.

4. The trim member of claim 1, wherein the trim member has more than one point at which the central viewing angle according to-15 ° to +15 ° isThe absolute value of a value obtained by dividing the slope of the angular luminance map by the angular luminance is 0.025 or more, wherein the angular unit is degree (°).

5. A trim member comprising:

a substrate; and

a decorative layer disposed on the substrate,

wherein, when a direction perpendicular to a plane of the decoration layer is defined as an x-axis, a direction on a surface of the decoration layer is defined as a y-axis, and the detector is used under the condition of a standard light source D65 in a wavelength range of 380nm ≦ λ ≦ 780nmWhen detecting the center point of the width of the y-axis on the decoration layer, the angle formed by the line connecting the center of the detector and the center point of the width of the y-axis on the decoration layer and the x-axis on the x-y-axis plane is defined as the central viewing angleA distance from the center of the detector to the center point of the width in a y-axis direction on the decorative layer is defined as Dv, and the center viewing angle is from-15 ° to +15 °Is represented by the following formula 21₂Is 0.3 or more:

[ formula 21]

₂＝|Δd’|max/D_v

Where | Δ d '| max is the maximum value of Δ d' represented by the following formula 13:

[ formula 13]

Wherein the content of the first and second substances,

anddue to arrival at a viewing angle from the detectorAnda distance identified by a difference in angular brightness of one point on the decoration layer identified below, and represented by the following formula 14 and the following formula 15, respectively:

[ formula 14]

[ formula 15]

Wherein the content of the first and second substances,andrespectively at the viewing angleAndangular brightness of the lower corner.

6. A trim member comprising:

a substrate; and

a decorative layer disposed on the substrate,

wherein, when a direction perpendicular to a plane of the decoration layer is defined as an x-axis, a direction on a surface of the decoration layer is defined as a y-axis, and a center point of a width of the y-axis on the decoration layer is detected using a detector under a condition of a standard light source D65 in a wavelength range of 380nm ≦ λ ≦ 780nm, an angle formed by a line connecting a center of the detector and the center point of the width of the y-axis on the decoration layer on an x-y axis plane and the x-axis is defined as a central viewing angleAnd the decorative member has one or more points atAt the one or more points, the central viewing angle according to-15 ° to +15 °The absolute value of a value obtained by dividing the slope of the angular luminance map by the angular luminance is 0.025 or more, wherein the angular unit is degree (°).

7. The decoration element according to any one of claims 1 to 6 wherein Dv is 500 mm.

8. The decoration member according to claim 7 wherein when all surfaces of the decoration layer are divided by a unit area having a size of 2.5mm x 2.5mm, angular brightness of light emitted from each unit area with a wavelength in a range of 380nm ≦ λ ≦ 780nm is the same.

9. The decoration member according to claim 7 wherein the decoration layer has a pattern arranged in one dimension, and a pitch in one dimension of the pattern is less than 1 mm.

10. The decoration member according to claim 7 wherein the decoration layer has a pattern arranged in two dimensions, and each pitch in the two-dimensional direction of the pattern is less than 1 mm.

11. The decoration member according to claim 7 wherein the difference in height of the upper surface of the decoration layer is more than 10 μm and less than 2 mm.

12. The decoration member according to claim 7 wherein, the decoration layer comprises:

a light reflecting layer disposed on the substrate;

a light absorbing layer disposed on the substrate;

a light reflecting layer disposed on the substrate and a light absorbing layer disposed on the light reflecting layer; or

A light absorbing layer disposed on the substrate and a light reflecting layer disposed on the light absorbing layer.

13. The decoration element according to claim 12 wherein the light reflection layer or the light absorption layer includes two or more dots having different thicknesses.

14. The decoration member according to claim 12, wherein the light reflection layer, the light absorption layer, or a laminated structure of the light reflection layer and the light absorption layer has dichroism of Δ Ε ab > 1.

15. The decoration member according to claim 12 wherein, the light reflection layer or the light absorption layer has a refractive index of 0 to 8 at 400 nm.

16. The decoration member according to claim 12 wherein an extinction coefficient at 400nm of the light reflection layer or the light absorption layer is more than 0 and not more than 4.

17. The decoration member according to any one of claims 1 to 6, wherein the decoration member is a decoration film, or a case of a mobile device or an electronic product.

18. The trim member of claim 12, wherein the trim member is a trim film or a housing of a mobile device.

Technical Field

The present specification claims priority and benefit of korean patent application No. 10-2018-0002278, filed on 8.1.2018 with the korean intellectual property office, the entire contents of which are incorporated herein by reference.

The present specification relates to a decoration member and a manufacturing method thereof. More particularly, the present specification relates to a decoration member suitable for mobile devices and electronic apparatuses and a method of manufacturing the same.

Background

For cellular phones, various mobile devices, and home appliances, product designs such as colors, shapes, and patterns play a key role in providing product value to customers in addition to product functions. The design of the product also affects the preference and price of the product.

For example, in the case of a mobile phone, various colors and color senses are realized on a product by various methods. Such a method includes applying a color to a case material for a mobile phone and attaching a decorative film (decorative film) provided with a desired color and shape to the case material to provide a design.

In the conventional decoration film, color representation is attempted by a method such as printing or deposition. The feature or image is represented by printing or deposition in a color different from the background color. However, when different colors are expressed on a single plane, printing should be performed at least twice, and when various colors are applied to a three-dimensional pattern, implementation is practically difficult. In addition, conventional decorative films have a fixed color even at different viewing angles. Although there is a slight variation, the variation is limited to the difference in color sensation.

Disclosure of Invention

Technical problem

The present description is directed to a trim member that is capable of providing a surface feature with a depth perception that is different from the physical surface structure of the trim member because the actual distance from the trim member to the eyes of the observer is different from the distance visually perceived by the observer.

Technical scheme

One embodiment of the present specification provides a decoration member including a substrate and a decoration layer provided on the substrate, wherein when a direction perpendicular to a plane of the decoration layer is defined as an x-axis, a direction on a surface of the decoration layer is defined as a y-axis, and a center point of a width of the y-axis on the decoration layer is detected using a detector under a condition of a standard light source D65 in a wavelength range of 380nm ≦ λ ≦ 780nm, an angle formed by a line connecting a center of the detector and the center point of the width of the y-axis on the decoration layer on the x-y-axis plane and the x-axis is defined as a center viewing angleThe distance from the center of the detector to the center point of the width in the y-axis direction on the decorative layer is defined as Dv, and the central viewing angle is-15 ° to +15 °Is represented by the following formula 1_1mIs 0.15 or more:

[ formula 1]

_1m＝|Δh|max/D_v

Where | Δ h | max is the maximum value of Δ h represented by the following formula 2:

[ formula 2]

Wherein Δ d is represented by the following formula 3:

[ formula 3]

Wherein the content of the first and second substances,

is defined as the viewing angle formed by the line connecting the center of the detector and any point on the y-axis on the decorative layer detected by the detector and the x-axis on the x-y axis plane; and is

Andrepresented by the following formula 4 and the following formula 5, respectively:

[ formula 4]

[ formula 5]

Wherein the content of the first and second substances,andrespectively at the viewing angle Andthe brightness of the lower corner of the strip,

wherein, in the formula 2,a range satisfying the following formula 6:

[ formula 6]

Wherein the content of the first and second substances,andare respectivelyMinimum and maximum values of.

Another embodiment of the present description provides the decorative member according to the above embodiment, wherein the central viewing angle is-15 ° to +15 °Of (a), a depth parameter value represented by the following formula 11_1bIs more than 3:

[ formula 11]

_1b＝|Δh’|max/Dv

Where, | Δ h '| max is the maximum value of Δ h' represented by the following formula 12:

[ formula 12]

Wherein Δ d' is represented by the following formula 13:

[ formula 13]

Wherein the content of the first and second substances,

anddue to arrival at the detector at the angle of viewAndthe distance identified by the difference in angular brightness of one point on the decorative layer identified below, and is represented by the following equations 14 and 15, respectively:

[ formula 14]

[ formula 15]

Wherein the content of the first and second substances,andrespectively at the viewing angleAndangular brightness of the lower corner.

Another embodiment of the present description provides the trim member according to the previous embodiment, wherein the central viewing angle is from-15 ° to +15 °Is represented by the following formula 21₂Is 0.3 or more.

[ formula 21]

₂＝|Δd’|max/D_v

Where | Δ d '| max is the maximum value of Δ d' represented by the above formula 13.

Another embodiment of the present description provides the trim member according to the above embodiment, wherein the trim member has one or more points at which a central viewing angle according to-15 ° to +15 ° is providedThe absolute value of a value obtained by dividing the slope of the angular luminance map by the angular luminance is 0.025 or more, wherein the angular unit is degree (°).

Another embodiment of the present specification provides a decoration member including a substrate and a decoration layer provided on the substrate, wherein, when a direction perpendicular to a plane of the decoration layer is defined as an x-axis, a direction on a surface of the decoration layer is defined as a y-axis, and a center point of a width of the y-axis on the decoration layer is detected using a detector under a condition of a standard light source D65 in a wavelength range of 380nm ≦ λ ≦ 780nm, an angle formed by a line connecting a center of the detector and the center point of the width of the y-axis on the decoration layer on the x-y-axis plane and the x-axis is defined as a central viewing angleThe distance from the center of the detector to the center point of the width in the y-axis direction on the decorative layer is defined as Dv, and the central viewing angle is-15 ° to +15 °Is represented by the following formula 21₂Is 0.3 or more:

[ formula 21]

₂＝|Δd’|max/D_v

Where | Δ d '| max is the maximum value of Δ d' represented by the above formula 13.

Another embodiment of the present specification provides a decoration element including a substrate and a decoration layer provided on the substrate, wherein, when a direction perpendicular to a plane of the decoration layer is defined as an x-axis, a direction on a surface of the decoration layer is defined as a y-axis, and a detector is used to detect a standard light source D65 in a wavelength range of 380nm ≦ λ ≦ 780nmAn angle formed by a line connecting the center of the detector and the center point of the width of the y-axis on the decorative layer and the x-axis on the x-y-axis plane at the center point of the width of the y-axis on the decorative layer is defined as a central viewing angleAnd the decoration member has one or more points at which a central viewing angle according to-15 DEG to +15 DEG is obtainedThe absolute value of a value obtained by dividing the slope of the angular luminance map by the angular luminance is 0.025 or more, wherein the angular unit is degree (°).

Another embodiment of the present specification provides the decoration member according to the above embodiment, wherein the decoration layer includes: a light reflecting layer disposed on the substrate; a light absorbing layer disposed on the substrate; a light reflecting layer disposed on the substrate and a light absorbing layer disposed on the light reflecting layer; or a light absorbing layer disposed on the substrate and a light reflecting layer disposed on the light absorbing layer.

Another embodiment of the present specification provides the decoration device according to the above embodiment, wherein the decoration device is a decoration film, or a case of a mobile device or an electronic product.

Advantageous effects

Embodiments of the present description provide a trim member that is capable of providing a surface characteristic with a depth perception that is different from the physical surface structure of the trim member because the actual distance from the trim member to the eyes of the observer is different from the distance visually perceived by the observer.

In particular, by forming the decorative layer of the decorative member in a structure having one or more light reflecting layers and/or one or more light absorbing layers, light reflection and/or light absorption occurs on an incident path upon incidence of external light and a reflection path upon reflection of light, and constructive and destructive interference occurs between the reflected light generated on the respective surfaces. A specific color can be expressed by light absorption on an incident path and an absorption path and constructive and destructive interference. In addition, since the expressed color depends on the thickness, even when the same material composition is used, the color can be changed according to the thickness. Therefore, when the light reflecting layer and/or the light absorbing layer have two or more points or regions having different thicknesses on the same surface, a plurality of colors can be expressed on the three-dimensional pattern by forming the color developing layer on the three-dimensional pattern.

Drawings

Fig. 1 illustrates an example of a laminated structure of a decoration member according to one embodiment of the present specification.

FIG. 2 illustrates a center point of a y-axis position and a y-axis width on a decorative layer of a trim member according to one embodiment of the present description;

FIG. 3 is a graph illustrating depth parameter values for a trim member according to one embodiment of the present description_1mSchematic of the calculation of (a);

FIG. 4 is a graph illustrating a distribution of angular brightness depending on a viewing angle of a trim member according to one embodiment of the present description;

FIG. 5 is a schematic diagram illustrating the calculation of | Δ h | max upon the calculation of a depth parameter value for a trim member according to one embodiment of the present description;

fig. 6 and 7 are diagrams illustrating | Δ d' | max and | Δ h | max at the time of calculation of a depth parameter value of a decoration member according to an embodiment of the present specification.

FIG. 8 illustrates viewing angle dependent depth parameter values according to film type_1m；

Fig. 9A shows an angular luminance distribution depending on a viewing angle according to a film type, and fig. 9B shows a ratio of a slope of the angular luminance distribution to an angular luminance;

FIG. 10 is a depth parameter value based on two eyes illustrating a trim member according to one embodiment of the present invention_1bSchematic of the calculation of (a);

FIG. 11 shows viewing angle dependent depth parameter values according to film type_1b；

FIG. 12 is a depth parameter value based on two eyes illustrating a trim member according to one embodiment of the present invention₂A graph of the calculation of | Δ d' | max at the time of the calculation of (1);

fig. 13 is a schematic view for explaining the principle of color development in the light reflecting layer and the light absorbing layer structure;

fig. 14 to 17 illustrate a laminated structure of a decoration member according to an embodiment of the present specification;

fig. 18 to 20 illustrate an upper surface structure of a light absorbing layer of a decoration member according to an embodiment of the present specification;

fig. 21 illustrates a pattern that may be formed on the upper surface of the light absorbing layer;

fig. 22 to 24 are diagrams showing changes in color expression according to the thickness of the light absorbing layer;

FIG. 25 illustrates viewing angle dependent depth parameter values according to film type₂；

FIG. 26 illustrates a laminated structure of a trim member according to some embodiments of the present description;

fig. 27 and 28 show the angular luminance of the asymmetric prism film used in example 5;

fig. 29 and 30 show the angular luminance of the asymmetric prism film used in example 6;

fig. 31 shows a light absorbing layer and a light reflecting layer; and

fig. 32 to 45 show pattern structures.

Detailed Description

Hereinafter, the present specification will be described in more detail.

As used herein, the term "dot" or "spot" refers to a location that has no area. In this specification, the above expression is used to indicate a specific position observed by an observer, or to indicate that two or more points different from each other in thickness exist in a light reflection layer or a light absorption layer. As used herein, the term "region" means a portion having an area. For example, when the decoration element is placed on the ground and the closed portion is defined on the upper surface of the decoration element in a direction perpendicular to the ground, the "region" of the decoration element refers to an area of the upper surface of the defined closed portion of the decoration element.

As used herein, the term "plane" or "area" may be a flat plane, but is not limited thereto, and all or a portion thereof may be a curved plane. For example, the shape of the vertical cross-section may include a portion of an arc of a circle or an ellipse, a wave structure, a zigzag structure, or the like.

As used herein, the term "inclined plane" refers to a plane formed by the upper surface of the decoration element and the ground when the decoration element is placed on the ground, the angle being greater than 0 degree and not greater than 90 degrees.

As used herein, the term "thickness" of any layer refers to the shortest distance from the lower surface to the upper surface of that layer.

As used herein, the term "or" means including, selectively or completely, the listed elements, i.e., "and/or," unless otherwise specified.

As used herein, the term "layer" means covering at least 70%, preferably at least 75%, more preferably at least 80% of the area where the respective layer is present.

An embodiment of the present specification provides a decoration member including a substrate and a decoration layer provided on the substrate, wherein, when a direction perpendicular to a plane of the decoration layer is defined as an x-axis, a direction on a surface of the decoration layer is defined as a y-axis, and a center point of a width of the y-axis on the decoration layer is detected using a detector under a condition of a standard light source D65 in a wavelength range of 380nm ≦ λ ≦ 780nm, an angle formed by a line connecting a center of the detector and the center point of the width of the y-axis on the decoration layer on the x-y-axis plane and the x-axis is defined as a center viewing angleThe distance from the center of the detector to the center point of the width in the y-axis direction on the decorative layer is defined as Dv, and the central viewing angle is-15 ° to +15 °Is represented by the following formula 1_1mIs 0.15 or more:

[ formula 1]

_1m＝|Δh|max/D_v

Where | Δ h | max is the maximum value of Δ h represented by the following formula 2:

[ formula 2]

Wherein Δ d is represented by the following formula 3:

[ formula 3]

Wherein the content of the first and second substances,

is defined as the angle of view formed by the line connecting the center of the detector and any point on the y-axis on the decorative layer detected by the detector and the x-axis on the x-y axis plane, andandrepresented by the following formula 4 and the following formula 5, respectively:

[ formula 4]

[ formula 5]

Wherein the content of the first and second substances,andrespectively at the viewing angle Andthe brightness of the lower corner of the strip,

wherein, in the formula 2,a range satisfying the following formula 6:

[ formula 6]

Wherein the content of the first and second substances,andare respectivelyMinimum and maximum values of.

In this specification, since the right side is defined as "+" and the left side is defined as "-" based on the center point of the width of the y-axis in the direction in which the detector faces the decoration layer, the axis "+ y" represents the y-axis to the right of the center point. Although it is not important which side is defined as "+" or "-", in this specification, the right side of the center point is defined as "+ y" axis to avoid confusion. That is, the x-y axis plane is composed of an x- (+ y) axis plane and an x- (-y) axis plane.

In this specification, whenWhen positive, exists on the x- (+ y) axis planeA line connecting the center of the detector with the center point of the width of the y-axis on the decorative layer. On the other hand, whenIn the negative value, there is a line on the x- (-y) axis plane connecting the center of the detector with the center point of the width of the y axis on the decorative layer.

Fig. 1 and 2 show a side surface structure and an upper surface structure of a decoration member according to an embodiment of the present specification, respectively. Fig. 1 shows a side surface structure in which a substrate and a decoration layer are laminated, wherein a direction perpendicular to the decoration layer is represented by an x-axis. Fig. 2 shows the decorative layer side of the decorative member, wherein any one direction in the plane of the decorative layer is represented by the y-axis. The y-axis is not limited to the direction shown in fig. 2 and may be selected from various directions.

In one embodiment, the y-axis may be horizontal or perpendicular to the longest edge of the trim layer.

In another embodiment, the y-axis may be perpendicular to the longest edge of the decorative layer, e.g., the y-axis is the y-axis of the first diagram of fig. 2.

The center point of the width of the y-axis refers to a point that is the same distance from both ends of the y-axis, as shown by the red dots in fig. 2.

Any detector may be used without particular limitation so long as it can visually recognize the shape and color of the decoration member, and may be a human eye or a device that can perform the same function as the human eye.

FIG. 3 is a graph for measuring a depth parameter value of a trim member according to an embodiment of the present description_1mSchematic representation of (a). In fig. 3, a direction perpendicular to the plane of the decorative layer is defined as an x-axis direction, a direction of width in any one direction on the plane of the decorative layer is defined as a y-axis direction, and a width direction perpendicular to the y-axis on the plane of the decorative layer is defined as a z-axis (i.e., the z-axis is perpendicular to both the x-axis and the y-axis). Here, the width of the decorative layer in the y-axis direction is defined as "d_f". The width of the decorative layer in the y-axis direction refers to the distance between both ends of the y-axis. In one embodiment, d_fMay be a decorative layerThe shortest width. For example, when the decorative layer has a rectangular shape, the width of the short side of the rectangle may be referred to as "d_f". Hereinafter, an angle formed by a line connecting the center of the detector and an arbitrary point on the decoration layer detected by the detector and the + z axis is referred to as "θ", and an angle formed by the line and the x axis on the x-y axis plane is referred to as "θ"

As shown in fig. 3, when light having a wavelength λ is emitted from a point of coordinates (0, y, z) of the surface of the decorative layer of the decorative memberAngular luminance in a direction is defined asWhile the center of the detector is locatedAnd the angular brightness in the direction of the line connecting the point to (0, y, z) is defined as At this time, the viewing angle is defined as

In the above-described embodiment, the angle of view θ is constant at the center located in the z-axis direction_vE.g. theta_vBy 90 °, the definition depends on the angleDepth parameter value of_1m。

In the above-described embodiment, the central viewing angle is from-15 degrees to +15 degreesOf the depth parameter value represented by the above formula 1_1mIs 0.15 or more. Therefore, when the depth parameter value is satisfied_1mThe surface characteristics having a sense of depth can be realized regardless of the presence or absence or type of the physical surface structure of the decorative member.

In the above formula 2, Δ d is defined as having a viewing angle according to eyes on the decoration layerDue to resolution in the region of minimum viewing angleLower at the cornerDistance recognized by the detector due to the difference in angular brightness in the direction, and distance due to the difference in angular brightness at the maximum viewing angleLower at the cornerThe difference in angular brightness in the direction and the difference in distance recognized by the detector, and Δ d is represented by the following formula a:

[ formula A ]

Wherein the content of the first and second substances,is detector at angleResolution in the direction.

The resolution of the eye refers to the ability of the detector to distinguish between more than two points. If the detector is a human eyeThe resolution may be slightly different from person to person. However, since the value of equation 1 converges to a specific value as the angular resolution decreases, the angular resolution within 1 ° does not change greatly. Thus, in the following equation 3, the angular resolutionIs set to 0.3.

In the formula 3, the first and second groups,andrespectively due to passing through a detectorAndthe viewing angle of the decorative layer to a point on the decorative layer.

In the above-mentioned formulas 4 and 5,andrespectively at the viewing angle Andangular brightness of (d). Each angular brightness can be calculated by reflection measurement or optical simulation at intervals of 5nm or less in a wavelength range of 380nm ≦ λ ≦ 780nm for incident light of the D65 light source. The reflectance measurement can be performed by Shimadzu SolidSpec-3700, KoreaNicamidetad CM-2600 d, CM-M6, etc., or using a halogen lamp, a monochromator, and a goniometer. When the incident light is a D65 standard light source, optical simulation can be performed at intervals of 5nm or less in a wavelength range of 380nm ≦ λ ≦ 780nm using reflected light for each angle reflected from the pattern. In addition, can be at The reflected light of each angle is calculated at intervals of 5 ° or less within the angle range of (a).

When light of wavelength lambda is emitted from the surface of the decorative member having uniform angular brightness satisfying the above requirementsAngular brightness in the direction is calledAnd the viewing angle is set to Then, r can be obtained by the following formulas B and C, and r is defined to be located based on the center arrival of the detectorDistance of points on the surface of the decorative layer of the decorative member in the direction:

[ formula B ]

Formula C below can be derived from formula B:

[ formula C ]

The above formula 4 and the above formula 5 are obtained in the same manner as the above formula B and the above formula C.

Here, r is not an actual distance but a distance that can be sensed due to an angular luminance difference.

At a viewing angleCentered and at four points Andrectangular in the plane of the verticesThe height difference in the direction can be represented by the following formula. The following equation D shows the height difference in the direction of the angle theta, and the following equation E shows the angleHeight difference in direction:

[ formula D ]

[ formula E ]

A surface slope in the theta direction at one point of the decorative member at the viewing angle thetae satisfies the following formula F, andat one point of the lower decorative memberThe surface slope in the direction satisfies the following formula G:

[ formula F ]

Δd/Dv sinθeΔ(θe)＝r/Dv sinθe(θe)

[ formula G ]

Formula F represents the surface slope in the theta direction sensed by the difference in angular brightness, not the actual surface slope at one point on the surface of the trim member, and formula G represents the surface slope sensed by the difference in angular brightnessThe surface slope in the direction, rather than the actual surface slope at a point on the surface of the trim member.

When the central angle of view (thetav) in the theta direction is 90 deg., depends onAngle of view in directionAn example of the distribution of angular luminance of (a) is shown in fig. 4.

The height difference at each position of the surface of the decoration member, that is, the height difference Δ D in the region indicated by the red rectangle in fig. 3 can be calculated by the equations D and E. When the width of the decorative layer in the y direction is d_fAnd the central view angle at which the center of the decoration member is connected to the center of the detector (e.g., eye) is fixedAt the time of decoration, on the surface of the decoration layer of the decoration memberAngle of view in directionCan be represented by the following formula H.

[ formula H ]

Equation 6 given above shows the angular resolution of the detector when it is usedSet to 0.3 ° (degree) in consideration of the width d in the y-axis direction_fAnd the distance Dv between the detector and the decorative layerMaximum and minimum values of. In this case, d_fIs defined as the width of the decorative layer in the y-axis direction. However, in this specification, although the actual width of the decorative layer is not equal to d_fAnd is greater than d_fBut may be shown as having a width d_fAnd although the actual width of the decorative layer is slightly less than d_fBut may show the depth parameter characteristics described above. For example, when d_fAt 100mm, in the case where the width of the decorative layer in the y-axis direction is greater than 100mm, the above-described depth parameter value can be satisfied in a region having a width of at least 100mm, and desired characteristics can be provided. 100mm is determined in consideration of a normal viewing angle of a detector, such as a human eye, or a width of a mobile device.

When Dv is 500mm, d_f＝100mm、θ_v＝90°、Andin the case of (2), Δ d and Δ h of the decoration member having the angular luminance distribution shown in fig. 4 may be represented by fig. 6 and 7, respectively. FIG. 5 is a graph showing | Δ |h|_maxSchematic representation of the meaning of (1).

The condition that the angular brightness of the light emitted from the surface of the decoration layer of the decoration member of fig. 3 is constant regardless of the value of the surface position (y, z) of the decoration layer may be described as follows. When all surfaces of the decoration layer are divided by a unit area having a size of 2.5mm × 2.5mm and the angular brightness of light having a wavelength λ emitted from the respective unit area areas is the same, the decoration layer may have the following condition. The following conditions may be applied to the above-described embodiment and the following embodiments.

(1) The decorative layer has a pattern arranged in one dimension, and a pitch in the one-dimensional direction of the pattern is less than 1 mm.

(2) The decorative layer has a pattern arranged in two dimensions, and each pitch in the two-dimensional direction of the pattern is less than 1 mm.

The one-dimensionally arranged pattern includes a pattern having a structure repeated in one direction (one dimension), such as a prism and lenticular pattern, and the two-dimensionally arranged pattern may include a pattern having a pattern arranged in two directions (two dimensions), such as a microlens array, but the present specification is not limited thereto.

Dv may be 500 mm. Dv is determined in consideration of the distance at which a detector such as the human eye observes an object in a distinguishable manner.

In one embodiment, the difference in height of the upper surface of the decorative layer is greater than 10 μm and less than 2 mm.

In one embodiment, the central viewing angleIn the range of-15 DEG to +15 DEG, the depth parameter value represented by the above formula 1_1mIs 0.15 or more.

In another embodiment of the present description, there is provided a decorative member, wherein a central viewing angle of-15 ° to +15 ° is providedOf (a), a depth parameter value represented by the following formula 11_1bIs more than 3:

[ formula 11]

_1b＝|Δh’|max/Dv

Where, | Δ h '| max is the maximum value of Δ h' represented by the following formula 12:

[ formula 12]

Wherein Δ d' is represented by the following formula 13:

[ formula 13]

Wherein the content of the first and second substances,

anddue to the arrival at the detector at the angle of viewAnda distance identified by a difference in angular brightness of a point on the identified decorative layer, and represented by the following equations 14 and 15, respectively:

[ formula 14]

[ formula 15]

Wherein the content of the first and second substances,andrespectively at the viewing angleAndangular brightness of the lower corner.

Δ d' is a specific central viewing angle on the decorative memberThe identified maximum height difference.

The difference in height in the direction of the angle theta is represented by the following formula J, angleThe height difference in the direction is represented by the following formula K:

[ formula J ]

[ formula K ]

Wherein the content of the first and second substances,

θ_dandangle theta direction and angle for left and right eyes, respectivelyThe difference in the viewing angle in the direction,

andare respectively due to the theta directions andthe difference in angular brightness in the direction and the distance sensed by the right eye,and are respectively due to the theta directions andthe difference in angular brightness in the direction and the distance sensed by the left eye.

Depth parameter value according to equation 11_1bConsidering the characteristics of the detector when the detector is two eyes, Dv is 500mm, theta_v90 degrees anddetermined under the condition of degree. In this case, considering the average distance between human eyes, in equation 13,is set to 50 mm.

In fig. 10 is shown a method for obtaining depth parameter values by means of two eyes_1bSchematic representation of (a).

When the detectors are two human eyes, in a case where a viewing angle formed by a line connecting a point of the surface of the ornamental member and the centers of the two eyes and the z-axis is defined as θ e, a viewing angle formed by the line and the x-axis on the x-y axis plane is defined asθ d is defined as a difference in angle of view in the θ direction between the left eye and the right eye, anddefined as between the left and right eyeDifference in viewing angle in direction, θ d andrepresented by the following formula L and the following formula M:

[ formula L ]

[ formula M ]

Wherein the content of the first and second substances,is a vector connecting the center of the left eye and the center of the right eye,is a unit vector in the z-axis direction.

When the viewing angle of the center of the left and right eyes is calledWhen the angle of view of the left eye isThe right eye has a visual angle ofR defined as the distance to a point (0, y, z) on the film surface sensed by the left and right eyes_l,rRepresented by the following formula N and the following formula O:

[ formula N ]

[ formula O ]

At a viewing angleCentered and at four points Andof areas on the plane of the apex The height difference Δ d' in the direction may be represented by the following formula P and the following formula Q, respectively.

[ formula P ]

[ formula Q ]

The surface slope in the theta direction at one point of the decorative member at the viewing angle thetae satisfies the following formula R, andat one point of the lower decorative memberThe surface slope in the direction satisfies the following formula S:

[ formula R ]

[ formula S ]

Formula R represents a surface slope in the θ direction sensed by the difference in angular brightness, not an actual surface slope at one point on the surface of the decorative member, and formula S represents a surface slope sensed by the difference in angular brightnessThe surface slope in the direction, rather than the actual surface slope at a point on the surface of the trim member.

Except that the angle between Dv and 90 mm, θ v and,θ d is 90 ° andunder the conditions of (1), useWithout using the angular resolution of the detectorOuter, and depth parameter values_1mThe description of the related above embodiments may be applied to the depth parameter value according to equation 11_1b。

At a central viewing angle of-15 DEG to +15 DEGIs represented by the following formula 11_1bWhen the number is 3 or more, the surface property having a sense of depth can be obtained, not the physical surface property of the decorative layer.

In another embodiment, a trim member is provided having a central viewing angle of between-15 ° and +15 °At least a part of the depth parameter values of 0.3 or more represented by the following formula 21₂。

[ formula 21]

₂＝|Δd’|max/D_v

Where | Δ d '| max is the maximum value of Δ d' represented by the above formula 13.

| Δ d' | max is the maximum value of the distance difference based on the angular luminance difference at a point on the y-axis of the decorative layer detected by the detector. In formula 21, a schematic diagram showing the meaning of | Δ d' | max is shown in fig. 12. At a central viewing angle of-15 DEG to +15 DEGIs represented by the following formula 21₂When the amount is 0.3 or more, the surface property having a sense of depth can be obtained, not the physical surface property of the decorative layer.

In another embodiment, a trim member is provided that includes more than one point at which a central viewing angle of from-15 ° to +15 ° is providedThe absolute value of a value obtained by dividing the slope of the angular luminance map by the angular luminance of (a) is 0.025 or more. In this case, the angle unit is expressed in "degrees (°)". In this case, surface characteristics having a sense of depth can be obtained instead of the physical surface characteristics of the decorative layer.

Another embodiment of the present specification provides a decorative member including a substrate and a decorative layer provided on the substrate, wherein a direction perpendicular to a plane of the decorative layer is defined as an x-axisThe direction on the surface of the decorative layer is defined as the y-axis, and when the center point of the width of the y-axis on the decorative layer is detected using a detector under the condition of a standard light source D65 in a wavelength range of 380nm ≦ λ ≦ 780nm, the angle formed by the line connecting the center of the detector and the center point of the width of the y-axis on the decorative layer and the x-axis on the x-y-axis plane is defined as the central viewing angleThe distance from the center of the detector to the center point of the width in the y-axis direction on the decorative layer is defined as Dv, and the central viewing angle is-15 ° to +15 °Is represented by the above formula 21 in at least a part of₂Is 0.3 or more. In this case, the amount of the solvent to be used,the range of the above formula 6 is satisfied. The decoration member can have a surface property having a depth feeling, not a physical surface property.

Another embodiment of the present specification provides a decorative member including a substrate and a decorative layer provided on the substrate, wherein when a direction perpendicular to a plane of the decorative layer is defined as an x-axis, a direction on a surface of the decorative layer is defined as a y-axis, and a center point of a width of the y-axis on the decorative layer is detected using a detector under a condition of a standard light source D65 in a wavelength range of 380nm ≦ λ ≦ 780nm, an angle formed by a line connecting a center of the detector and the center point of the width of the y-axis on the decorative layer on the x-y-axis plane and the x-axis is defined as a central viewing angleAnd the decoration member includes one or more points at which a central viewing angle according to-15 DEG to +15 DEG is obtainedThe slope of the angular luminance map divided by the angular luminanceThe absolute value of the obtained value is 0.025 or more. In this case, the angle unit is expressed in "degrees (°)". In this case, the decorative layer may have surface characteristics having a sense of depth, not physical surface characteristics.

In another embodiment, the decorative layer comprises: a light reflecting layer disposed on the substrate; or a light absorbing layer disposed on the substrate; or a light reflecting layer disposed on the substrate and a light absorbing layer disposed on the light reflecting layer; or a light absorbing layer disposed on the substrate and a light reflecting layer disposed on the light absorbing layer. Fig. 26 shows the structure of the decorative layer.

In another embodiment of the present specification, the light reflecting layer or the light absorbing layer includes two or more dots having different thicknesses.

Another embodiment of the present specification provides a decoration element wherein the light reflection layer or the light absorption layer includes two or more dots having different thicknesses.

For example, when the decorative layer has a laminated structure including a light reflection layer and a light absorption layer, light is absorbed in the light absorption layer through a light incident path and a light reflection path, and light is reflected on a surface of the light absorption layer and an interface between the light absorption layer and the light reflection layer, so that the two reflected lights perform constructive or destructive interference. In this specification, light reflected from the surface of the light absorbing layer may be expressed as "surface reflection light", and light reflected from the interface between the light absorbing layer and the light reflecting layer may be expressed as "interface reflection light". Fig. 13 shows a structure in which the substrate 101, the light reflection layer 201, and the light absorption layer 301 are stacked in this order. Fig. 13 shows that the substrate is disposed below the light reflection layer, but the specification is not limited thereto.

The light absorbing layer and the light reflecting layer will be described with reference to fig. 31. In the decoration member of fig. 31, based on the direction of light incidence, in accordance with L_i－1、L_iAnd L_i+1The layers are laminated in this order, and the interface I_iIs arranged at L_i－1And L_iBetween layers, interface I_i+1Is arranged at L_iAnd I_i+1Between the layers.

When in a direction perpendicular to the layersInterface I when emitting light having a specific wavelength in a direction to prevent interference on the thin film_iThe reflectance of (b) can be represented by the following formula 1:

[ formula 1]

Wherein n is_i(λ) represents a refractive index according to a wavelength λ of the i-th layer, k_i(λ) represents an extinction coefficient according to the wavelength λ of the ith layer. The extinction coefficient is an index that defines the intensity at which an object absorbs light of a particular wavelength, and will be defined as follows:

is defined as the interface I calculated at each wavelength using equation 1_iR of the sum of the reflectivities at the respective wavelengths_iMay be represented by the following formula 2:

[ formula 2]

Examples of the structure according to the above-described embodiment are shown in fig. 14 and 15. In fig. 14 and 15, the light absorbing layer 301 is disposed on the light reflecting layer 201, and the light absorbing layer includes two or more dots having different thicknesses. As can be seen from fig. 14, the thickness of the light absorbing layer 301 at point a is different from the thickness at point B. As can be seen from fig. 15, the thickness of the light absorbing layer 301 in the region C is different from that in the region D.

In another embodiment of the present specification, the light absorbing layer includes at least one region having an inclined surface, an upper surface of the at least one region having an inclined angle greater than 0 degree and not greater than 90 degrees, and the light absorbing layer includes at least one region having a thickness different from that of the at least one region having the inclined surface.

The surface characteristics, such as inclination, of the upper surface of the light reflecting layer may be the same as those of the upper surface of the light absorbing layer. For example, by using a deposition method when forming the light absorbing layer, the upper surface of the light absorbing layer can be designed to have the same inclination as the upper surface of the light reflecting layer.

Fig. 16 shows the structure of the decoration member having the light absorption layer whose upper surface has the inclined surface. Fig. 16 shows a structure in which the substrate 101, the light reflecting layer 201, and the light absorbing layer 301 are stacked, in which the thickness t1 in the E region of the light absorbing layer 301 is different from the thickness t2 in the F region of the light absorbing layer 301.

Fig. 16 relates to a light absorbing layer including inclined surfaces facing each other with a triangular shape in cross section. As shown in fig. 16, although deposition is performed under the same condition in the structure having the pattern of the inclined surfaces facing each other, the thickness of the light absorbing layer may be different on both surfaces having the triangular structure. As a result, the light absorbing layer having two or more regions with different thicknesses can be formed by only one process. Therefore, the expressed color differs depending on the thickness of the light absorbing layer. In this case, when the thickness of the light reflecting layer is not less than a predetermined value, the color change is not affected.

In another embodiment of the present description, the light absorbing layer includes at least one region having a gradually changing thickness. Fig. 14 shows a structure in which the thickness of the light absorbing layer gradually changes.

In another embodiment of the present specification, the light absorbing layer includes at least one region having an inclined surface, an upper surface of the at least one region has an inclined angle greater than 0 degree and not greater than 90 degrees, and the at least one region having the inclined surface has a structure in which a thickness of the light absorbing layer gradually changes. Fig. 17 shows a structure including a light absorbing layer having a region with an inclined upper surface. In both the G region and the H region shown in fig. 17, the upper surface of the light absorbing layer has an inclined upper surface, and the thickness of the light absorbing layer gradually changes.

For example, the light reflection layer or the light absorption layer includes a first region having a first inclined surface whose inclination angle is in a range of 1 to 90 degrees, and may further include a second region whose upper surface has an inclined surface whose inclination direction or inclination angle is different from that of the first inclined surface, or whose upper surface is horizontal. In this case, the thickness of the light reflecting layer or the light absorbing layer may be different in the first region and the second region.

For example, the light reflection layer or the light absorption layer includes a first region having a first inclined surface with an inclination angle in a range of 1 degree to 90 degrees, and may further include two or more second regions whose upper surfaces have inclined surfaces with an inclination direction or an inclination angle different from that of the first inclined surface, or whose upper surfaces are horizontal. In this case, the thicknesses of the light reflecting layer or the light absorbing layer in the first region and the two or more second regions may be different.

In another embodiment of the present specification, the light reflection layer or the light absorption layer may include a pattern having an asymmetric structure. In the present specification, an asymmetric structure means that it has an asymmetric structure on at least one surface when viewed from an upper surface, a side surface or a cross section. In the case of this asymmetric structure, the decorative member may exhibit dichroism. The term "dichroic" means that different colors are observed depending on the viewing angle.

The color may be represented by CIE Lab and the chromaticity (color difference) may be defined using the distance (Δ E ab) in the Lab space. Specifically, the chroma (color difference) isAnd the observer cannot recognize 0<ΔE*ab<1 (cf. Machine Graphics and Vision 20(4): 383-411). Thus, in this specification, dichroism may be defined as "Δ Ε ab>1”。

In one embodiment of the present description, the light reflecting layer, the light absorbing layer, or the stacked structure of the light reflecting layer and the light absorbing layer may have dichroism of Δ Ε ab > 1.

In embodiments of the present description, the trim member may have a dichroism of Δ Ε ab > 1.

In another embodiment of the present description, when the light absorbing layer includes a pattern, the pattern may be a symmetric structure, an asymmetric structure, or a combination thereof.

For example, the light absorbing layer may further include a pattern having a symmetrical structure. The symmetric structure includes a prism structure, a lenticular lens structure, and the like.

In another embodiment of the present specification, the light absorbing layer may include a pattern having an asymmetric structure.

In one embodiment of the present specification, the light absorbing layer includes a convex portion or a concave portion having an asymmetric cross section.

In one embodiment of the present specification, the light absorbing layer includes a convex portion having an asymmetric cross section.

In one embodiment of the present description, the light absorbing layer includes a recess having an asymmetric cross section.

In one embodiment of the present specification, the light absorbing layer includes a convex portion having an asymmetric cross section and a concave portion having an asymmetric cross section.

In the present specification, the term "cross section" refers to a surface when a convex or concave portion is cut in one direction. For example, the cross section may refer to a surface when the convex or concave portion is cut in a direction parallel to the ground or perpendicular to the ground when the decoration member is placed on the ground. The surface of the convex portion or the surface of the concave portion of the light absorbing layer of the garnish member according to the above-described embodiment is characterized in that at least one of cross sections in a direction perpendicular to the ground surface has an asymmetric structure.

In the present specification, the term "asymmetric cross section" means that a pattern formed by edges of a cross section has a structure excluding line symmetry or point symmetry. The line symmetry refers to a characteristic that the patterns overlap when the patterns are arranged symmetrically based on a straight line. The point symmetry means that the figure has a symmetrical characteristic of completely overlapping the original figure when the figure is rotated by 180 degrees based on one point. Here, the edges of the cross-section of the asymmetric structure may be straight lines, curved lines, or a combination thereof.

In one embodiment of the present description, the shape of the convex or concave portion having an asymmetric cross section includes at least two sides, at least one cross section of the at least two sides having a different inclination angle or a different curvature, or the at least two sides having different side shapes. For example, when two sides among sides constituting at least one cross section have different inclination angles, different curvatures, or different side shapes, the convex or concave portion has an asymmetric structure.

The decoration member can exhibit dichroism by including the convex or concave portion having an asymmetric cross section in the surface of the light absorbing layer as described above. The term "dichroic" means that different colors are observed depending on the viewing angle. Color representation can be expressed as CIE L a b, and chromaticity (color difference) can be defined using the distance in space (Δ Ε ab). Specifically, the chroma (color difference) isObserver can not recognize 0<ΔE^*ab<1 (reference: Machine Graphics and Vision 20(4): 383-. Thus, in this specification, dichroism may be defined as "Δ Ε ab>1”。

In one embodiment of the present description, the trim member has a dichroism of Δ Ε ab > 1. Specifically, the color difference Δ Ε ab may be greater than 1, wherein the color difference Δ Ε ab is the distance in space of L a b in the color coordinate system CIE L a b in the entire decorative member.

In one embodiment of the present description, the color-developing layer has a dichroism of Δ Ε ab > 1. Specifically, the color difference Δ Ε ab, which is the distance in space of the color coordinate system CIE L a b in the color rendering layer, may be larger than 1.

In one embodiment of the present description, the shape of the convex or concave portion having an asymmetric cross section includes at least two sides, at least one cross section of which has a different inclination angle or a different curvature, or the at least two sides have different shapes. For example, when two sides among sides constituting at least one cross section have different inclination angles, different curvatures, or different side shapes, the convex or concave portion has an asymmetric structure.

In one embodiment of the present specification, the convex or concave shape includes a first inclined face and a second inclined face having different inclination angles.

In one embodiment of the present specification, the convex or concave shape includes a first inclined side and a second inclined side, and an inclination angle of at least one cross section of the first inclined side and the second inclined side is different from an inclination angle of the other inclined side. The first and second inclined sides have the same or different shapes from each other and each have a straight line or a curved line.

In one embodiment of the present disclosure, the edges of the cross-section of the asymmetric structure are straight lines, curved lines, or a combination thereof.

Fig. 32 shows that the first and second inclined sides have a straight shape. Each of the protrusions includes a first region D1 having a first inclined edge and a second region D2 having a second inclined edge. The first and second inclined sides have a linear shape. The angle c3 formed by the first and second angled edges may be 75 to 105 degrees. The angle c1 formed by the first angled edge and the ground (base plate) is different from the angle c2 formed by the second angled edge and the ground. For example, the combination of c1 and c2 may be 20 degrees/80 degrees, 10 degrees/70 degrees, or 30 degrees/70 degrees.

Fig. 33 shows that the first or second oblique side has a curved shape. The cross section of the light absorbing layer has a convex shape including a first region E1 having a first inclined side and a second region E2 having a second inclined side. At least one of the first inclined side and the second inclined side may be a curved line. For example, both the first and second oblique edges may be curved, the first oblique edge may be a straight line, and the second oblique edge may be a curved line. When the first inclined side has a linear shape and the second inclined side has a curved shape, the angle c1 may be greater than the angle c 2. Fig. 33 shows that the first oblique side has a linear shape and the second oblique side has a curved shape. The angle formed by the curved oblique side and the ground surface may be calculated from an angle formed by a straight line and the ground surface, which is formed when an arbitrary straight line is drawn from a point where the oblique side contacts the ground surface to a point where the first oblique side contacts the second oblique side. The curved second inclined edge may have a different radius of curvature according to the height of the light absorbing layer, and the curve may have a radius of curvature. The radius of curvature may be 10 times or less the width of the convex portion (E1+ E2). Fig. 33 (a) shows that the curvature radius of the curve is twice the width of the convex portion, and fig. 33 (b) shows that the curvature radius of the curve is twice the width of the convex portion. The ratio of the width of the curvature portion (E2) to the width of the convex portion (E1+ E2) may be 90% or less. Fig. 33 (a) and 33 (b) show that the ratio of the width of the curvature portion (E2) to the width of the convex portion (E1+ E2) is 60%.

In this specification, the inclination angle of the inclined side may be used in the same manner as the inclination angle of the inclined surface.

In this specification, unless otherwise specified, "side" may be a straight line, but the specification is not limited thereto, and the whole or a part thereof may be a curved line. For example, the edge may comprise a portion of an arc of a circle or ellipse, a wave structure, a zig-zag structure, or the like.

In this specification, when the edge includes a part of an arc of a circle or an ellipse, the circle or the ellipse may have a radius of curvature. When the very short section of the curve is converted into a circular arc, the radius of curvature may be defined as the radius of the circular arc.

In the present specification, the inclination angle of the convex portion may refer to an angle formed by the inclined surface of the convex portion and the horizontal surface of the light absorbing layer. Unless otherwise stated herein, the first inclined plane may be defined as a left inclined plane of the convex portion and the second inclined plane may be defined as a right inclined plane of the convex portion in the drawings.

In the present specification, unless otherwise specified, the term "inclined edge" refers to an edge that forms an angle of more than 0 degree and not more than 90 degrees with the ground by the decoration member when the decoration member is placed on the ground. In this case, when the edge is a straight line, an angle formed by the straight line and the ground may be measured. When the edge comprises a curve, the angle formed by the ground and a straight line connecting the point closest to the ground and the point furthest from the ground at the shortest distance can be measured.

In the present specification, unless otherwise specified, the term "inclined surface" refers to a surface that forms an angle of more than 0 degree and not more than 90 degrees with the ground by the surface of the decoration member when the decoration member is placed on the ground. In this case, when the surface is a flat surface, the angle formed by the flat surface and the ground can be measured. When the surface comprises a curved surface, the angle formed by the ground and a straight line connecting the point closest to the ground and the point furthest from the ground at the shortest distance can be measured.

In the present specification, unless otherwise specified, the term "inclination angle" means an angle formed by the ground surface and the surface or edge constituting the light absorbing layer when the decoration member is placed on the ground surface, which is greater than 0 degree and not greater than 90 degrees. Alternatively, the angle may refer to an angle formed by the ground plane and a line (a '-b') formed when a point (a ') where the surface or edge constituting the light absorbing layer contacts the ground plane is connected to a point (b') where the light absorbing layer is farthest from the ground plane.

In this specification, unless otherwise specified, the term "curvature" refers to the change in slope of a tangent line at successive points on an edge or face. The curvature increases as the change in slope of the tangent line at successive points on the edge or face increases.

In the present specification, the convex portion may have a convex portion unit shape, and the concave portion may have a concave portion unit shape. The shape of the convex unit or the concave unit refers to a shape including two inclined sides (a first inclined side and a second inclined side), and does not refer to a shape including three or more inclined sides. Referring to fig. 36, the convex P1 of the circle C1 has one convex unit shape including a first inclined side and a second inclined side. However, the shape included in the circle C2 includes two convex units. The first inclined side may be defined as a left inclined side of the convex or concave portion, and the second inclined side may be defined as a right inclined side of the convex or concave portion.

In one embodiment of the present description, an angle formed by the first inclined surface and the second inclined surface may be in a range of 80 degrees to 100 degrees. Specifically, the angle may be 80 degrees or more, 83 degrees or more, 86 degrees or more, or 89 degrees or more, and 100 degrees or less, 97 degrees or less, 94 degrees or less, or 91 degrees or less. The angle may include an angle of a vertex formed by the first inclined face and the second inclined face. When the first inclined surface and the second inclined surface do not form a vertex, the angle may refer to an angle of a vertex formed by virtually extending the first inclined surface and the second inclined surface.

In one embodiment of the present specification, a difference between an inclination angle of the first inclined surface of the convex portion and an inclination angle of the second inclined surface of the convex portion may be in a range of 30 degrees to 70 degrees. For example, the difference between the inclination angle of the first inclined side of the convex portion and the inclination angle of the second inclined side of the convex portion is 30 degrees or more, 35 degrees or more, 40 degrees or more, or 45 degrees or more, and 70 degrees or less, 65 degrees or less, 60 degrees or less, or 55 degrees or less. When the difference in the inclination angle between the first inclined face and the second inclined face is within the range, the direction-dependent color representation may be advantageous. That is, when the difference between the inclination angles of the inclined sides is within the range, the thicknesses of the light absorbing layers respectively formed on the first inclined side and the second inclined side may be changed. Therefore, when the decoration member is viewed from the same direction, dichroism may be increased (see table 1 below).

TABLE 1

In one embodiment of the present description, the cross section of the convex or concave portion may have a polygonal shape, such as a triangular or rectangular shape. Fig. 34 shows that the convex portion has a rectangular shape. The rectangular shape may be a general rectangular shape, and there is no particular limitation on the rectangular shape as long as the inclination angles of the respective inclined sides are different. The rectangular shape may have a portion left after a portion of the triangle is cut away. For example, the convex portion may be a trapezoid, meaning a square in which a pair of opposite sides are parallel to each other, or a rectangle in which a pair of opposite sides are not parallel to each other. The convex portion includes a first region F1 having a first inclined edge, a second region F2 having a second inclined edge, and a third region F3 having a third inclined edge. The third oblique edge may be parallel to the ground or may not be parallel to the ground. For example, when the rectangular shape is a trapezoid, the third inclined side is parallel to the ground. Any one or more of the first to third slanted sides may be a curved line, and details of the curved line shape are described above. The sum of the lengths of F1+ F2+ F3 may be defined as the pitch of the protrusions, and the details of the pitch are as described above.

Fig. 37 illustrates a method of defining a convex shape. For example, the convex shape may be obtained by removing a specific area of the ABO1 triangular shape. The specific area removed will be determined as follows. The details of the inclination angles c1 and c2 are the same as described above.

1) An arbitrary point P1 on the AO1 segment is set which divides the AO1 segment at a ratio of L1: L2.

2) An arbitrary point P2 on the BO1 segment is set which divides the BO1 segment at a ratio of m1: m 2.

3) An arbitrary point O2 on the AB segment that divides the AB segment at a ratio of n1: n2 is set.

4) An arbitrary point P3 on the O2O1 segment that divides the O2O1 segment at a ratio of O1: O2 is set.

At this time, the ratios of L1: L2, m1: m2, n1: n2, and o1: o2 may be the same or different, and may each independently be 1:1000 to 1000: 1.

5) The regions forming the polygons of P1O1P2P3 are removed.

6) The shape forming the polygon of ABP2P3P1 is defined as the cross section of the convex portion.

The shape of the convex portion can be variably changed by controlling the ratios of L1: L2, m1: m2, n1: n2, and o1: o 2. For example, as L1 and m1 increase, the height of the pattern may increase, and when o1 increases, the height of the concave portion formed on the convex portion may decrease. By controlling the ratio of n1, the position of the lowest point of the concave portion formed on the convex portion can be adjusted to be close to any inclined side of the convex portion.

When the ratios of L1: L2, m1: m2, n1: n2, and o1: o2 are the same, the cross section may have a trapezoidal shape (fig. 38). The height (ha, hb) of the trapezoid can be varied by controlling the ratio of L1: L2. For example, (a) of fig. 38 shows the shape of a convex portion generated when the ratio of L1: L2 and the ratio of m1: m2 are 2:3, and (b) of fig. 38 shows the shape of a convex portion generated when the ratio of L1: L2 and the ratio of m1: m2 are 1:1, the ratio of m1: m2 is 1:1, and the ratio of o1: o2 is 1: 8.

In one embodiment of the present specification, the convex or concave shape includes two or more convex or concave shapes. When there are two or more convex or concave shapes, dichroism can be improved. At this time, the two or more convex or concave shapes may include repeated identical shapes, but may include different shapes. Such a structure is shown in fig. 39 to 41.

Fig. 39 shows a structure in which two or more different convex shapes are alternately provided. A structure may be provided in which second protrusions P2 having a smaller height than the protrusions P1 are disposed between the protrusions P1. Hereinafter, the convex portion described before the second convex portion may be referred to as a "first convex portion".

Fig. 40 shows a structure in which a concave portion exists between two or more convex portions. The surface of the light absorbing layer may further include concave portions P3, the concave portions P3 having a smaller height than the convex portions in the tip portions (cusps) of the convex portions P1. Such a decoration member can exhibit an effect of providing an image color slightly changed according to a viewing angle.

Fig. 41 shows an inverted angular shape. In this way, the light absorbing layer may have a convex or concave shape, and the angular shape may be reversed.

Specifically, as shown in fig. 41 (a), the surface of the light absorbing layer may have a structure in which a plurality of projections are inverted by 180 degrees. Specifically, the surface of the light absorbing layer may include a first region C1 in which the inclination angle of the second inclined surface is greater than that of the first inclined surface, and a second region C2 in which the inclination angle of the second inclined surface is greater than that of the first inclined surface, in the first region C1, and in the second region C2. For example, the convex portion included in the first region may be referred to as "first convex portion" P1, and the convex portion included in the second region may be referred to as "fourth convex portion" P4. The heights of the first and fourth protrusions P1 and P4, and the widths, inclination angles, and angles formed by the first and second inclined surfaces of the first and fourth protrusions P1 and P4 may be the same as those described in detail with respect to the protrusion P1.

As shown in (b) of fig. 41, one of the first area and the second area may correspond to an image or a logo, and the other may correspond to a background portion. Such a decoration member can exhibit an effect that the color of an image or a logo slightly changes according to the viewing angle. In addition, the image or logo portion and the background portion may have a decorative effect that represents colors interchangeably according to the viewing direction.

The first region and the second region may each include a plurality of protrusions. The widths of the first and second regions and the number of convex portions may be appropriately controlled in consideration of the size of the desired image or mark.

In one embodiment of the present specification, the light absorbing layer may further include two or more convex portions, and a flat portion in a part or the whole between the respective convex portions.

As shown in fig. 35, a flat portion may be included between the respective convex portions of the light absorbing layer. The flat portion refers to a region where no convex portion exists. The description of the remaining elements (D1, D2, c1, c2, c3, first inclined edge, and second inclined edge) is the same as described above, except that the light absorbing layer further includes a flat portion. On the other hand, the total length of D1+ D2+ G1 is defined as the pitch of the pattern, which is different from the width of the pattern as described above.

The height H1 of the convex portion P1 may be 5 μm to 30 μm. When the height of the convex portion is within the range defined above, it may be advantageous in terms of production processes. In the present specification, the height of the convex portion may refer to the shortest distance between the highest portion and the lowest portion of the convex portion based on the horizontal plane of the light absorbing layer. The description of the numerical range regarding the height of the convex portion as described above may be applied to the depth of the concave portion as described above.

The width W1 of the convex portion P1 may be 10 μm to 90 μm. When the width of the convex portion is within the range defined above, it may be advantageous in terms of pattern processing and forming processes. For example, the width W1 of the projection P1 is 10 μm or more, 15 μm or more, 20 μm or more, or 25 μm or more, and is 90 μm or less, 80 μm or less, 70 μm or less, 60 μm or less, 50 μm or less, 40 μm or less, or 35 μm or less. The description relating to the width can be applied to the aforementioned concave portions as well as convex portions.

The gap between the convex portions P1 may be 0 μm to 20 μm. In the present specification, the gap between the convex portions may refer to the shortest distance between a point at which one of the two convex portions ends and a point at which the other of the two convex portions starts. The decorative region should be relatively bright when viewed from the inclined surface of the convex portion having a large inclination angle. When the gap between the convex portions is appropriately maintained, a phenomenon that the reflection area is grayed out due to the shadow can be improved. As described later, second protrusions having a smaller height than the protrusions may be present between the protrusions. The description relating to the gap can be applied to the aforementioned convex portion and the convex portion.

The height H2 of the second protrusion P2 may be in the range of 1/5 to 1/4 of the height H1 of the first protrusion P1. For example, the difference (H1-H2) between the height of the first protrusion and the height of the second protrusion may be 10 μm to 30 μm. The width W2 of the convex portion may be 1 μm to 10 μm. Specifically, the width W2 of the convex portion may be 1 μm or more, 2 μm or more, 3 μm or more, 4 μm or more, or 4.5 μm or more, and 10 μm or less, 9 μm or less, 8 μm or less, 7 μm or less, 6 μm or less, or 5.5 μm or less.

In one embodiment of the present specification, the second convex portion may have two inclined surfaces S3 and S4 having different inclination angles from each other. The angle a4 formed by the two inclined surfaces of the second protrusion may be 20 degrees to 100 degrees. Specifically, the angle a4 may be 20 degrees or more, 30 degrees or more, 40 degrees or more, 50 degrees or more, 60 degrees or more, 70 degrees or more, 80 degrees or more, or 85 degrees or more, and 100 degrees or less or 95 degrees or less. The difference (a 6-a 5) in the inclination angle between the two inclined surfaces of the second projection may be 0 to 60 degrees. The difference in the inclination angles (a 6-a 5) may be 0 degrees or more, 10 degrees or more, 20 degrees or more, 30 degrees or more, 40 degrees or more, or 45 degrees or more, and 60 degrees or less, or 55 degrees or less. When the size of the second convex portion is within the above range, advantageously, light incidence is increased on the side surface having a large inclined surface angle, and thus a brighter color can be obtained.

In one embodiment of the present description, the height H3 of the recess P3 may be 3 μm to 15 μm. The height H3 of the recessed portion P3 is specifically 3 μm or more, and 15 μm or less, 10 μm or less, or 5 μm or less. The recess may have two inclined surfaces S5 and S6 having inclination angles different from each other. The angle a7 formed by the two inclined surfaces of the recess may be 20 to 100 degrees. The angle a7 may specifically be 20 degrees or more, 30 degrees or more, 40 degrees or more, 50 degrees or more, 60 degrees or more, 70 degrees or more, 80 degrees or more, or 85 degrees or more, and 100 degrees or less or 95 degrees or less. The difference in inclination angle between the inclined surfaces of the recess (a 9-a 8) may be 0 to 60 degrees. The difference in the inclination angles (a 9-a 8) may be 0 degrees or more, 10 degrees or more, 20 degrees or more, 30 degrees or more, 40 degrees or more, or 45 degrees or more, and 60 degrees or less, or 55 degrees or less. When the size of the concave portion is within this range, there is an advantage that the color tone can be added to the mirror surface.

For example, the upper surface of the light reflecting layer or the light absorbing layer includes a pattern having tapered convex portions or concave portions. The cone shape includes a cone, an elliptical cone, or a polygonal cone. Here, the shape of the bottom surface of the polygonal pyramid includes a triangular shape, a rectangular shape, a star shape having five or more protrusions, and the like. The taper shape may have a shape of a convex portion formed on the upper surface of the light reflecting layer or the light absorbing layer, or a shape of a concave portion formed on the upper surface of the light absorbing layer. The convex portion has a triangular cross-sectional shape, and the concave portion has an inverted triangular cross-sectional shape. The bottom surface of the light reflecting layer or the light absorbing layer may have the same shape as the upper surface of the light absorbing layer.

For example, the tapered pattern may be asymmetric. For example, when a cone-shaped pattern is viewed from the upper surface, in the case of having three or more identical shapes when rotated 360 degrees with respect to the apex of the cone, dichroism is hardly expressed from the pattern. However, when the cone pattern is viewed from the upper surface, dichroism may be expressed when the cone has the following two same shapes when rotated by 360 degrees with respect to the apex of the cone. Fig. 18 shows the upper surface of the conical shape. Fig. 18 (a) shows a symmetrical tapered shape, and fig. 18 (b) shows an asymmetrical tapered shape.

The symmetrical conical shape refers to the following structure: the base surface of the conical shape is circular or there are regular polygons of the same length on each side of the cone and on the vertex of the cone on a perpendicular line to the center of gravity of the base surface. However, when viewed from the top surface, an asymmetric taper refers to the following structure: the location of the apex of the cone lies on a perpendicular line to the point rather than the center of gravity of the ground, or the base has an asymmetric polygonal or elliptical shape. When the bottom face has an asymmetric polygonal shape, at least one of the sides or corners of the polygon may be designed differently from the rest.

For example, as shown in FIG. 19, the location of the apex of the cone may be changed. Specifically, when the apex of the cone is designed to be located on the vertical line of the center of gravity 01 of the ground, when viewed from the top, as shown in the first diagram of fig. 19, when rotated 360 degrees based on the apex of the cone, four identical structures (4-fold symmetry) can be obtained. However, by designing the apex of the cone at position 02 instead of the center of gravity 01 of the ground, the symmetrical structure is broken. When the length of one side of the bottom surface is set to x, the moving distance of the apex of the cone is set to a and b, the height of the cone shape, i.e., the length of a line connecting the apex (01 or 02) of the cone to the ground surface vertically is set to h, and the angle formed by the ground surface and the side surface of the cone is set to θ n, the following coincidence value (coincidence value) can be obtained for the surfaces 1, 2,3, and 4 in fig. 19.

In this case, θ 1 and θ 2 are the same, and thus no dichroism exists. However, θ 3 and θ 4 are different, and θ 3- θ 4 | represent a color difference (chromaticity) (. DELTA.E. ab) between two colors, and thus represent dichroism. Here, - [ theta ] 3-theta 4 | is > 0. Therefore, the angle between the bottom surface and the side surface of the cone quantifies the degree to which the symmetric structure is broken, i.e., the degree of asymmetry, and the value representing the degree of asymmetry is proportional to the chromaticity of the dichroism.

According to another example, the light reflecting layer or the light absorbing layer includes a pattern having linear protrusions at the apexes or linear recesses at the base points. The linear shape may be a straight line, a curved line, or both a straight line and a curved line. When the pattern having the linear convex or linear concave is viewed from the upper surface, dichroism is hardly expressed in the case where the pattern has two or more identical shapes when the center of gravity of the upper surface is rotated 360 degrees. However, when the pattern having the linear convex or linear concave is viewed from the upper surface, dichroism can be expressed in the case of having only one identical shape when rotated 360 degrees with respect to the center of gravity of the upper surface. Fig. 20 shows the upper surface of the pattern having linear protrusions, where (a) of fig. 20 shows the pattern having linear protrusions exhibiting no dichroism, and (b) of fig. 20 shows linear protrusions exhibiting dichroism. The cross section taken along X-X 'of fig. 20 (a) is an isosceles triangle or an equilateral triangle, and the cross section taken along Y-Y' of fig. 20 (b) is a triangle having sides of different lengths.

According to another example, the light reflecting layer or the light absorbing layer includes a pattern having a convex or concave portion whose tapered upper surface is cut off. The cross-section of such a pattern may have a trapezoidal or inverted trapezoidal shape. In addition, in this case, dichroism can be expressed by designing upper surfaces, side surfaces, or cross sections each having an asymmetric structure.

In addition to the structures illustrated above, various convex or concave patterns as shown in fig. 21 can be realized.

In one embodiment of the present specification, the light absorbing layer includes a pattern including a vertex having a linear convex portion or a bottom point having a linear concave portion. The linear shape may be a straight line, a curved line, or both a straight line and a curved line, or a zigzag shape. This structure is shown in fig. 42 to 45. When the surface of the structure having the linear convex portion at the apex or the linear concave portion at the base is viewed from the surface of the convex portion or concave portion shape, dichroism can be easily expressed in the case of having only one identical shape when rotated 360 degrees from the center of gravity of the upper surface when the pattern having the linear convex portion or concave portion is viewed from the top.

In one embodiment of the present specification, the surface of the light absorbing layer includes a pattern having projections or recesses, and tapered tip portions (peaks) of the projections or recesses are cut off. Fig. 45 is a view showing an inverted trapezoidal recess having an asymmetrical cross section perpendicular to the ground surface when the decoration member is placed on the ground surface. Such an asymmetric cross-section may be trapezoidal or inverted trapezoidal. Even in this case, dichroism can be expressed by the asymmetric cross-sectional structure.

The light absorbing layer can express various colors according to a refractive index (n), an extinction coefficient (k) and a thickness (t). Fig. 22 shows the reflectance per wavelength according to the thickness of the light absorbing layer, and fig. 23 shows the color obtained according to the thickness of the light absorbing layer. Specifically, fig. 23 is a graph of a simulated graph of the reflectivity of CuO/Cu depending on the deposition thickness of CuO, which is data obtained by varying the thickness of CuO in the range of 10nm to 60nm under the same deposition conditions.

Fig. 24 is a graph showing simulation results in which different colors are observed according to viewing angles. FIG. 24 shows the simulation results of CuON/Al. In fig. 24, the thickness of the light absorbing layer is increased from 10nm to 10nm at 10nm, and the incident angle is adjusted from 0 degree to 60 degrees at 15 degree intervals. As can be seen from the simulation results, in the structure according to the embodiment of the present specification, various colors can be realized by adjusting the thickness of the light absorbing layer and the inclination angle of the upper surface.

In fig. 24, the values of the coordinates of L a B from a1 to a5 are (91,3,5), the values of L a B from B1 to B5 are (74,14,8), (72,15,10), (69,15,11) and (66,16,13), the values of L a B from C1 to C5 are (46,22, -11), (45,22, -10), (43,25, -9), (40,28, -4) and (42,30,6), the values of L a B from D1 to D5 are (36, -12, -22), (35, -11, -23), (30, -7, -24), (20,6, -26) and (18,38, -12), the values of L a from E1 to E5 are (36, -12), (35, -11, -23), (30, -7, -24), (20,6, -26) and (18,38, -12), the values of L a from E1 to E5 are (20), (49, -48), (48, -8, -48), (48, -48), (48, -8), (48, -7, 13, 8, 13, 11, 13, 39) and (18,7, -10), the L a b coordinate values of F1 to F5 are (60, -10, 4), (59, -10, 4), (55, -11, 4), (47, -11, 4) and (31, -4, 3), respectively, the L a b coordinate values of G1 to G5 are (66, -4, 10), (65, -4, 10), (62, -4, 10), (54, -5, 11) and (40, -2, 10), respectively, the L a b coordinate values of H1 to H5 are (69,1,11), (68,1,12), (64,1,13), (58,1,14) and (44,2,13), the L a b coordinate values of I1 to I5 are (68,5,11), (67,5,11), (64,5,12), (58,6, 12) and (58, 42, 26, respectively), and the L a b coordinate values of I5 are (68,5,11), (67,5,11), (64, 12), (58,6, 12), 8,8), (65,8,8), (62,8,10), (56,9,11) and (43,11, 11).

The light reflection layer is not particularly limited as long as it is a material capable of reflecting light, but light reflectance may be determined according to the material, and for example, color may be easily realized at light reflectance of 50% or more. The light reflectivity can be measured using an ellipsometer.

The refractive index (n) of the light absorbing layer at 400nm is preferably 0 to 8, 0 to 7, 0.01 to 3, and 2 to 2.5. The refractive index n can be calculated by sin θ 1/sin θ 2 (where θ 1 is the angle of light incident from the surface of the light absorbing layer and θ 2 is the angle of light refracted within the light absorbing layer).

The refractive index (n) of the light absorbing layer at 380 to 780nm is preferably 0 to 8, 0 to 7, 0.01 to 3 or 2 to 2.5.

The extinction coefficient (k) of the light absorbing layer at 400nm is greater than 0 and not greater than 4, preferably 0.01 to 4, 0.01 to 3.5, 0.01 to 3, or 0.1 to 1. The extinction coefficient k is represented by- λ/(4 π I) (dI/dx) and is obtained by multiplying the attenuation ratio (dI/I) of the light intensity per unit length (dx) (e.g., 1m) of the path in the light absorbing layer by λ/4 π, where λ is the wavelength of the light.

The extinction coefficient (k) of the light absorbing layer at 380 to 780nm is greater than 0 and not more than 4, preferably 0.01 to 4, 0.01 to 3.5, 0.01 to 3 or 0.1 to 1.

Since the extinction coefficient (k) in the entire visible wavelength range of 400nm, preferably 380 to 780nm, is in the range defined above, the light absorbing layer can function normally in the visible light range.

For example, the light absorption spectrum when a method of absorbing light by adding a dye to a resin is used is different from the light absorption spectrum when a material having an extinction coefficient as defined above is used. When light is absorbed by adding a dye to a resin, the absorption wavelength band is fixed, and the absorption amount changes only according to the change in coating thickness. In addition, in order to obtain a desired light absorption amount, a thickness variation of at least several micrometers is required to control the light absorption amount. On the other hand, a material having an extinction coefficient shows a change in the wavelength band of light to be absorbed although the thickness varies within the specification of several nanometers to several tens of nanometers.

In one embodiment, the light reflecting layer may be a metal layer, a metal oxynitride layer, or an inorganic layer. The light reflection layer may be composed of a single layer or a multilayer including two or more layers.

For example, the light reflection layer may be a single layer or a multilayer including one or more materials selected from indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), iron (Fe), chromium (Cr), cobalt (Co), gold (Au), and silver (Ag), an oxide, a nitride, or an oxynitride thereof, or a carbon and carbon composite. For example, the light reflecting layer may include an alloy of two or more selected from the above materials, or an oxide, nitride, or oxynitride thereof. For example, the light reflecting layer may include an alloy of two or more selected from metals. More specifically, the light reflecting layer may include molybdenum, aluminum, or copper. According to another example, the light reflective layer may be manufactured using an ink including carbon or a carbon composite, so that the light reflective layer can achieve high resistance. Examples of carbon or carbon composites include carbon black, CNT, and the like. The ink including carbon or a carbon composite may include the above-described material or an oxide, nitride or oxynitride thereof, for example, at least one oxide selected from indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), iron (Fe), chromium (Cr), cobalt (Co), gold (Au) and silver (Ag). After printing the ink including carbon or carbon composite, a curing process may be further performed.

When the light reflection layer includes two or more materials, the two or more materials may be formed by a single process (e.g., a deposition or printing method). However, after one layer is formed of more than one material, another layer is further formed thereon of more than one material. For example, indium or tin is deposited to form a layer, and a carbon-containing ink is printed and cured to form a light reflective layer. The ink may further comprise an oxide, such as titanium oxide or silicon oxide.

According to one embodiment, the light absorbing layer may include a single layer or a plurality of layers of two or more layers. The light absorbing layer may be formed of a material having an extinction coefficient (k) at 380 to 780nm, that is, a material having an extinction coefficient greater than 0 and not greater than 4, preferably 0.01 to 4. For example, the light absorbing layer may include one or more selected from the group consisting of a metal, a metalloid, and an oxide, nitride, oxynitride, and carbide of the metal or the metalloid. Oxides, nitrides, oxynitrides, or carbides of metals or metalloids may be formed under deposition conditions determined by one skilled in the art. The light absorbing layer may include two or more of the same metal, metalloid, alloy or oxynitride as the light reflecting layer.

For example, the light absorbing layer may include a single layer or a plurality of layers including at least one material selected from indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), iron (Fe), chromium (Cr), cobalt (Co), gold (Au), and silver (Ag), or an oxide, nitride, or oxynitride thereof. Specifically, the light absorbing layer includes one or more selected from copper oxide, copper nitride, copper oxynitride, aluminum oxide, aluminum nitride, aluminum oxynitride, and molybdenum oxynitride.

For example, the light absorbing layer includes silicon (Si) or germanium (Ge).

The light absorbing layer composed of silicon (Si) or germanium (Ge) has a refractive index (n) of 0 to 8 or 0 to 7 at a wavelength of 400nm and an extinction coefficient (k) of more than 0 and not more than 4, preferably 0.01 to 4, 0.01 to 3 or 0.01 to 1.

For example, the light absorbing layer includes one or two selected from copper oxide, copper nitride, copper oxynitride, aluminum oxide, aluminum nitride, aluminum oxynitride, and molybdenum oxynitride. In this case, the light absorbing layer may have a refractive index (n) at 400nm of 1 to 3, for example 2 to 2.5, and an extinction coefficient (k) of greater than 0 and not greater than 4, preferably 0.01 to 2.5, more preferably 0.2 to 2.5, even more preferably 0.2 to 0.6.

For example, the light absorbing layer is AlO_xN_y(x＞0，y＞0)。

According to another example, the light absorbing layer may be AlO_xN_y(0≤x≤1.5，0≤y≤1)。

According to another example, the light absorbing layer is made of AlO_xN_y(x>0，y>0) Prepared by mixing the above components in proportion to the total number of atomsThe ratio of 100% satisfies the following formula:

in one embodiment, the light absorbing layer may be made of a material having an extinction coefficient (k) at 400nm, preferably 380nm to 780 nm. For example, the light absorbing/reflecting layer may be made of a material such as CuO/Cu, CuON/Al, AlON/Al, AlN/AL/AlON/Cu or AlN/Cu.

In one embodiment, the thickness of the light reflecting layer may be determined according to the desired color in the final structure, e.g. 1nm or more, preferably 25nm or more, e.g. 50nm or more, preferably 70nm or more.

In one embodiment, the light absorbing layer may have a thickness of 5nm to 500nm, for example 30nm to 500 nm.

In one embodiment, the difference in thickness between the regions of the light absorbing layer is 2nm to 200nm, and may be determined according to a desired color difference.

In one embodiment, the light reflecting layer may further include a substrate disposed on a lower surface of the light reflecting layer or an upper surface of the light absorbing layer. The surface characteristics, such as inclination, of the upper surface of the substrate may be the same as those of the upper surfaces of the light reflecting layer and the light absorbing layer. This is because the light reflecting layer and the light absorbing layer are formed by deposition so that the substrate, the light reflecting layer, and the light absorbing layer may have inclined planes having the same angle. For example, such a structure may be realized by forming an inclined surface or a three-dimensional structure on the upper surface of the substrate and sequentially depositing the light reflecting layer and the light absorbing layer on the substrate, or sequentially depositing the light absorbing layer and the light reflecting layer.

For example, the inclined surface or the three-dimensional structure may be formed on the surface of the substrate by forming a pattern on an ultraviolet curable resin and curing the resin using ultraviolet rays or by performing laser processing. In one embodiment, the decorative member may be a decorative film or a housing of a mobile device. The decoration member may further include an adhesive layer according to necessity.

When the inclined surface or the three-dimensional structure is formed in the above-described manner, the material for the substrate is not particularly limited and may be a UV curable resin known in the art.

A protective layer may be further provided on the light absorbing layer.

For example, an adhesive layer may be further provided on the opposite surface of the substrate provided with the light absorbing layer or the light reflecting layer. The adhesive layer may be an Optically Clear Adhesive (OCA) layer. A release liner for protection may be further provided on the adhesive layer, if necessary.

Although a deposition method such as sputtering has been described as an example of a method of forming the light reflection layer and the light absorption layer, various methods for manufacturing a thin film may be employed as long as the structure and features according to the embodiments described herein can be obtained. For example, vapor deposition, Chemical Vapor Deposition (CVD), wet coating, and the like may be used.

Hereinafter, the present specification will be described in more detail with reference to the following examples. These examples are for illustration only and should not be construed as limiting the scope of the description.