阅读说明：本技术 盖玻璃印刷垫、使用其制造盖玻璃的方法以及盖玻璃 (Cover glass printing pad, method for manufacturing cover glass using same, and cover glass ) 是由 沈柄烈 曹锺甲 于 2020-02-13 设计创作，主要内容包括：一种盖玻璃印刷垫、制造该盖玻璃的方法以及该盖玻璃。盖玻璃印刷垫包括：夹具部分；主体部分,在主体部分中第一表面接触夹具部分,并且第二表面的至少一部分平行于第一表面；以及垫部分,包括设置在主体部分的至少一侧上并且在与第二表面垂直的第一方向上突出的外框架部分。(A cover glass printing pad, a method of manufacturing the cover glass, and the cover glass. The cover glass printing pad includes: a clamp portion; a body portion in which the first surface contacts the clamp portion and at least a portion of the second surface is parallel to the first surface; and a pad portion including an outer frame portion disposed on at least one side of the body portion and protruding in a first direction perpendicular to the second surface.)

1. A cover glass printing blanket comprising:

a clamp portion;

a body portion in which a first surface contacts the clamp portion and at least a portion of a second surface is parallel to the first surface; and

a pad portion including an outer frame portion disposed on at least one side of the body portion and protruding in a first direction perpendicular to the second surface.

2. The cover glass printing pad of claim 1, wherein the body portion includes a first side extending in a second direction perpendicular to the first direction and a second side extending in a third direction perpendicular to the first direction and crossing the second direction.

3. The cover glass printing pad of claim 2 wherein the outer frame portion includes a first outer frame portion in which a region adjacent to the first side protrudes in the first direction.

4. The cover glass printing pad as claimed in claim 3, wherein at least a part of one end of the first outer frame portion protruding in the first direction has an inclined shape.

5. The cover glass printing pad as claimed in claim 4, wherein in the one end of the first outer frame portion, an outer surface protruding in the first direction has a rounded shape.

6. The cover glass printing pad as claimed in claim 3, wherein the first outer frame portion has a shape in which two side surfaces are inclined.

7. The cover glass printing pad of claim 3, wherein the outer frame portion further includes a second outer frame portion in which a region adjacent to the second side protrudes in the first direction, and

the length of the first outer frame portion measured in the second direction is longer than the length of the second outer frame portion measured in the third direction.

8. The cover glass printing pad of claim 7 wherein the first and second outer frame portions are integral with one another.

9. A method of manufacturing a cover glass, the method comprising the steps of:

providing a base member including a first region having one surface parallel to a first direction and a second region adjacent to the first region and not parallel to the first direction; and

forming a first light blocking layer disposed on at least a portion of the first region adjacent to the second region and a second light blocking layer disposed on at least a portion of the second region and partially contacting an end of the first light blocking layer.

10. The method of claim 9, wherein forming the first light blocking layer comprises:

contacting a first pad contacting the first region with at least a portion of the first region and transferring a first light blocking ink to the contacted region; and

drying the first light resistance blocking ink.

11. The method of claim 10, wherein forming the second light blocking layer comprises:

contacting a second pad contacting the second region with at least a portion of the second region and transferring a second light blocking ink to the contacted region; and

and drying the second light resistance ink blocking.

12. The method of claim 11, wherein the second pad comprises: a clamp portion; a body portion in which a first surface contacts the clamp portion and at least a portion of a second surface is parallel to the first surface; and a pad portion including an outer frame portion provided on at least one side of the body portion and protruding in a first direction perpendicular to the second surface, and

a contact region between one protruding end of the outer frame portion and the base member includes at least the second region.

13. The method of claim 11, wherein the step of drying the second light-blocking ink is performed at a temperature of 150 to 180 degrees celsius, and the step of drying the first light-blocking ink is performed at a temperature of 60 to 80 degrees celsius.

14. The method of claim 13, wherein a third light blocking layer is further provided, the third light blocking layer being disposed over the first light blocking layer and recessed inward from both ends of the first light blocking layer.

15. The method of claim 14, wherein, after the step of forming the first light blocking layer, the step of disposing the third light blocking layer comprises the steps of:

transferring a third light blocking ink onto the first light blocking layer using the first pad; and

and drying the third light resistance ink blocking.

16. The method of claim 11, wherein the first light blocking layer is disposed over the first region after the second light blocking layer is formed.

17. A cover glass, comprising:

a base member including a first region having one surface parallel to a first direction and a second region adjacent to the first region and not parallel to the first direction;

a first light blocking layer disposed on at least a portion of the first region adjacent to the second region; and

a second light blocking layer disposed on at least a portion of the second region and partially contacting an end of the first light blocking layer.

18. The cover glass of claim 17, wherein a width of the first light blocking layer is greater than a width of the second light blocking layer.

19. The cover glass of claim 18, further comprising a third light blocking layer disposed over at least a portion of the first light blocking layer,

wherein both ends of the first light blocking layer protrude from both ends of the third light blocking layer.

20. The cover glass of claim 19, wherein the first, second, and third light blocking layers are arranged to extend in a second direction that intersects the first direction.

Technical Field

Exemplary embodiments of the invention relate to a cover glass printing pad, a method of manufacturing a cover glass using the printing pad, and a cover glass manufactured by the method. More particularly, exemplary embodiments of the invention relate to a cover glass printing pad that can be selectively printed on an at least partially slanted or rounded area of a cover glass.

Background

With the development of multimedia, the importance of display devices has increased. Accordingly, various types of display devices, such as organic light emitting displays ("OLEDs") and liquid crystal displays ("LCDs"), have been used. Such display devices may be used in a variety of mobile electronic devices such as smart phones, smart watches, and tablet personal computers ("PCs").

In various display devices for mobile electronic apparatuses, a cover glass is generally manufactured to be transparent so that a user can see a display unit disposed in front of a display panel. The display panel may include a display area displaying an actual image and a non-display area other than the display area. The cover glass may include a light-transmitting area corresponding to a display area of the display panel and an opaque light-blocking area corresponding to a non-display area of the display panel. In the opaque light blocking region, a light blocking member for partially blocking light emitted from the display panel may be provided, or predetermined ink may be printed.

Recently, the importance of display devices having partially inclined or rounded display surfaces has increased. For example, a surface of the front cover glass forming the appearance of the display device may be partially rounded to improve the aesthetic sense of the display device and the grip feeling of a user.

Disclosure of Invention

In the case of a cover glass having a partially inclined or rounded region, a portion of the light blocking region is inclined or rounded, and thus the region may be provided with a light blocking member or may be printed with predetermined ink. In an exemplary embodiment, a predetermined ink may be printed on the cover glass by a pad printing method to form the light blocking region. In this case, when the conventional hemispherical mat is used, there are the following problems: ink is not easily printed due to poor pad contact in the sloped or rounded areas.

Exemplary embodiments of the invention will provide a cover glass printing pad for printing a light blocking ink on a partially inclined or rounded cover glass and a method of manufacturing a cover glass using the same.

Another exemplary embodiment of the invention is to provide a cover glass on which light blocking ink is easily printed on a partially inclined or rounded region of the cover glass.

However, the exemplary embodiments of the invention are not limited to the exemplary embodiments set forth herein. The above and other exemplary embodiments of the invention will become more apparent to those skilled in the art to which the invention pertains by referring to the detailed description of the invention given below.

In a disclosed exemplary embodiment, a cover glass printing pad includes: a clamp portion; a body portion in which the first surface contacts the clamp portion and at least a portion of the second surface is parallel to the first surface; and a pad portion including an outer frame portion disposed on at least one side of the body portion and protruding in a first direction perpendicular to the second surface.

In an exemplary embodiment, the body portion includes a first side extending in a second direction perpendicular to the first direction and a second side extending in a third direction perpendicular to the first direction and crossing the second direction.

In an exemplary embodiment, the outer frame portion includes a first outer frame portion in which a region adjacent to the first side protrudes in the first direction.

In an exemplary embodiment, at least a part of one end of the first outer frame portion protruding in the first direction has an inclined shape.

In an exemplary embodiment, in the one end of the first outer frame portion, an outer surface protruding in the first direction has a rounded shape.

In an exemplary embodiment, the first outer frame portion has a shape in which two side surfaces are inclined.

In an exemplary embodiment, the outer frame portions further include a second outer frame portion in which a region adjacent to the second side protrudes in the first direction, and a length of the first outer frame portion measured in the second direction is longer than a length of the second outer frame portion measured in the third direction.

In an exemplary embodiment, the first and second outer frame portions are integral with one another.

In a disclosed exemplary embodiment, a method of manufacturing a cover glass includes the steps of: providing a base member including a first region having one surface parallel to a first direction and a second region adjacent to the first region and not parallel to the first direction; and forming a first light blocking layer disposed on at least a portion of the first region adjacent to the second region and a second light blocking layer disposed on at least a portion of the second region and partially contacting an end of the first light blocking layer.

In an exemplary embodiment, the step of forming the first light blocking layer includes: contacting a first pad contacting the first region with at least a portion of the first region and transferring a first light blocking ink to the contacted region; and drying the first photoresist.

In an exemplary embodiment, the step of forming the second light blocking layer includes: contacting a second pad contacting the second region with at least a portion of the second region and transferring a second light blocking ink to the contacted region; and drying the second photoresist.

In an exemplary embodiment, the second pad includes: a clamp portion; a body portion in which the first surface contacts the clamp portion and at least a portion of the second surface is parallel to the first surface; and a pad portion including an outer frame portion provided on at least one side of the body portion and protruding in a first direction perpendicular to the second surface, and a contact region between one protruding end of the outer frame portion and the base member includes at least a second region.

In an exemplary embodiment, the step of drying the second light blocking ink is performed at a temperature of about 150 degrees celsius (° c) to about 180 ℃, and the step of drying the first light blocking ink is performed at a temperature of about 60 ℃ to about 80 ℃.

In an exemplary embodiment, a third light blocking layer is further provided, which is disposed on the first light blocking layer and is recessed inward from both ends of the first light blocking layer.

In an exemplary embodiment, after the step of forming the first light blocking layer, the step of disposing a third light blocking layer includes: transferring a third light blocking ink onto the first light blocking layer using the first pad; and drying the third photoresist.

In an exemplary embodiment, after the second light blocking layer is formed, the first light blocking layer is disposed on the first region.

In a disclosed exemplary embodiment, a cover glass includes: a base member including a first region having one surface parallel to the first direction and a second region adjacent to the first region and not parallel to the first direction; a first light blocking layer disposed on at least a portion of the first region adjacent to the second region; and a second light blocking layer disposed on at least a portion of the second region and partially contacting one end of the first light blocking layer.

In an exemplary embodiment, the width of the first light blocking layer is greater than the width of the second light blocking layer.

In an exemplary embodiment, a third light blocking layer is disposed on at least a portion of the first light blocking layer, wherein both ends of the first light blocking layer protrude from both ends of the third light blocking layer.

In an exemplary embodiment, the first, second and third light blocking layers are arranged to extend in a second direction crossing the first direction.

Drawings

The above and other exemplary embodiments and features of the invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:

FIG. 1 is an exploded perspective view of an exemplary embodiment of a display device including a cover glass;

FIG. 2 is a schematic diagram illustrating an exemplary embodiment of a cover glass;

FIG. 3 is a cross-sectional view taken along line Ia-Ia' of FIG. 2;

FIG. 4 is a schematic perspective view illustrating an exemplary embodiment of a pad printing apparatus including a print pad;

FIG. 5 is a perspective view illustrating an exemplary embodiment of a print pad;

FIG. 6 is a schematic plan view of the printing pad of FIG. 5;

FIG. 7 is a cross-sectional view taken along line IIa-IIa' of FIG. 5;

FIG. 8 is a cross-sectional view taken along line IIIa-IIIa' of FIG. 5;

FIG. 9 is a flow chart illustrating an exemplary embodiment of a method of manufacturing a cover glass;

FIG. 10 is a flow chart illustrating an exemplary embodiment of a portion of a method of manufacturing a cover glass;

fig. 11 to 17 are sectional views illustrating the manufacturing method of fig. 10;

FIG. 18 is a flow chart illustrating an exemplary embodiment of a method of forming a third light blocking layer;

fig. 19 to 21 are cross-sectional views according to the flow chart of fig. 18;

FIG. 22 is a flow chart illustrating another exemplary embodiment of a method of manufacturing a cover glass;

FIGS. 23 and 24 are schematic views showing other exemplary embodiments of a print pad;

FIG. 25 is a schematic view showing another exemplary embodiment of a print pad;

FIG. 26 is a schematic view showing another exemplary embodiment of a cover glass; and

fig. 27 is a sectional view taken along line Ib-Ib' of fig. 26.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

It will also be understood that when a layer is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. Like reference numerals refer to like elements throughout the specification.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element discussed below could be termed a second element without departing from the teachings of the present invention. Similarly, a second element may be termed a first element.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as including "at least one" unless the context clearly indicates otherwise. "or" means "and/or". As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It will be further understood that the terms "comprises" and/or "comprising," and/or variations thereof, when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.

In this specification, "on … …," "above … …," "top," "upper side," or "upper surface" refers to the Z-axis direction, "below … …," "below … …," "bottom," "lower side," or "lower surface" refers to the direction opposite the Z-axis direction. Further, "left", "right", "upper", and "lower" refer to directions when the display panel is viewed from a plane. For example, "left" refers to a direction opposite to the X-axis direction, "right" refers to the X-axis direction, "up" refers to the Y-axis direction, and "down" refers to a direction opposite to the Y-axis direction.

As used herein, "about" or "approximately" includes the stated value and means within an acceptable range of deviation of the particular value as determined by one of ordinary skill in the art, in view of the problematic measurements and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system). For example, "about" can mean within one or more standard deviations, or within ± 30%, ± 20%, ± 10%, ± 5% of the stated value.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Exemplary embodiments are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the embodiments described herein should not be construed as limited to the particular shapes of regions as illustrated herein but are to include variations in shapes that result, for example, from manufacturing. For example, a region shown or described as flat may generally have rough and/or nonlinear features. In addition, the sharp corners shown may be rounded. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the present claims.

Hereinafter, embodiments of the invention will be described with reference to the drawings.

Fig. 1 is an exploded perspective view of an exemplary embodiment of a display device including a cover glass.

The display device 1 in the exemplary embodiment may include a display member 20 and a cover glass 10. Although it is shown in fig. 1 that the display device 1 includes the display member 20 and the cover glass 10 that completely covers the display member 20, the invention is not limited thereto. In some cases, the display device 1 may further include other members such as a touch member and an adhesive member. Hereinafter, the display device 1 including the display member 20 and the cover glass 10 will be described.

Referring to fig. 1, the display means 20 may be means for displaying information or an image by an input data signal. In an exemplary embodiment, for example, an organic light emitting display panel, an inorganic light emitting display panel, a liquid crystal display panel, a plasma display panel, or an electrophoretic display panel may be applied as the display member 20. However, the invention is not limited thereto.

The display member 20 may have a rectangular shape in plan view. In an exemplary embodiment, for example, as shown in fig. 1, the display member 20 may have a rectangular planar shape having a short side in the first direction (X-axis direction) and a long side in the second direction (Y-axis direction). The corners where the short sides in the first direction (X-axis direction) meet the long sides in the second direction (Y-axis direction) may have a right-angled shape, or may have a rounded shape with a predetermined curvature. However, the planar shape of the display member 20 is not limited to a rectangular shape, but may be provided in other various shapes such as a polygonal shape, a circular shape, or an elliptical shape. Further, although it is illustrated in fig. 1 that the display member 20 is flat, the invention is not limited thereto. At least one side of the display member 20 may be curved with a predetermined curvature.

The cover glass 10 may be disposed on one surface (e.g., an upper surface of the display member 20) of the display member 20 in the third direction (Z-axis direction). The cover glass 10 may cover the display member 20 of the display device 1 to protect the display member 20. In an exemplary embodiment, for example, the cover glass 10 may have substantially the same shape as that of the display member 20, and may have a size larger than that of the display member 20 to completely cover one surface of the display member 20. That is, each side of the cover glass 10 may protrude from each side of the display member 20, but the invention is not limited thereto. Details of the cover glass 10 will be described in detail with reference to fig. 2 and 3.

Fig. 2 is a schematic view showing an exemplary embodiment of a cover glass. Fig. 3 is a sectional view taken along line Ia-Ia' of fig. 2.

Referring to fig. 1 to 3, the cover glass 10 may include a base member 12 and a light blocking member 15 disposed on at least a portion of the base member 12.

The base member 12 may be a substrate constituting a basic skeleton of the cover glass 10. The base member 12 may include a transparent material so that a series of information displayed on the display member 20 may be displayed. In an exemplary embodiment, the base member 12 may comprise, for example, glass or plastic. When the base member 12 of the cover glass 10 comprises a plastic material, the cover glass 10 may have flexible properties.

Examples of plastics that may be applied to base member 12 may include, but are not limited to, polyimide, polyacrylate, polymethylmethacrylate ("PMMA"), polycarbonate ("PC"), polyethylene naphthalate ("PEN"), polyvinylidene chloride, polyvinylidene fluoride ("PVDF"), polystyrene, ethylene vinyl alcohol copolymer, polyethersulfone ("PES"), polyetherimide ("PEI"), polyphenylene sulfide ("PPS"), polyallylate, triacetylcellulose ("TAC"), and cellulose acetate propionate ("CAP").

When the base member 12 comprises plastic, the base member 12 may further include a coating (not shown) disposed on the upper and lower surfaces thereof. The coating layer may be a hard coating layer including organic layers and/or organic-inorganic composite layers each including an acrylate compound. The organic layer may include an acrylate compound. The organic-inorganic composite layer may be a layer in which an inorganic material such as silicon oxide, zirconium oxide, aluminum oxide, tantalum oxide, niobium oxide, or glass beads is dispersed in an organic material such as an acrylate compound. In another exemplary embodiment, the coating may include a metal oxide layer. In an exemplary embodiment, the metal oxide layer may include a metal oxide of, for example, titanium, aluminum, molybdenum, tantalum, copper, indium, tin, or tungsten, but the invention is not limited thereto.

The base member 12 has substantially the same shape as that of the cover glass 10, and other members provided on the base member 12 may constitute one cover glass 10 together with the base member 12. That is, the shape of the base member 12 is not particularly limited as long as the base member 12 can cover the entire display member 20 as described above. In an exemplary embodiment, the base member 12 may have, for example, a rectangular shape in plan view. In particular, the base member 12 may have a rectangular shape including right angles in plan view, or may have a rectangular shape including rounded corners in plan view.

In this case, the base member 12 may include long sides LS1 and LS2 facing parallel to each other and extending in the second direction (Y-axis direction) and short sides SS1 and SS2 facing parallel to each other and extending in the first direction (X-axis direction). For convenience of explanation, in the drawings, in a plan view, the left long side is referred to as a first long side LS1, the right long side is referred to as a second long side LS2, the upper short side is referred to as a first short side SS1, and the lower short side is referred to as a second short side SS 2. In an exemplary embodiment, the length of each of the long sides LS1 and LS2 may be longer than the length of each of the short sides SS1 and SS2, and the length of each of the long sides LS1 and LS2 may be about 1.5 times to about 2.5 times the length of each of the short sides SS1 and SS 2. However, the invention is not limited thereto.

As shown in the drawings, the base member 12 may have a shape in which one surface is flat and each outer side edge is not rounded in a cross-sectional view. However, the invention is not limited thereto, and in some cases, the base member 12 may have a shape in which the edge of each outer side is rounded with a predetermined curvature, or may have a completely rounded shape. Details of the base member 12 will be described later with reference to other exemplary embodiments.

The light blocking member 15 may be disposed on at least a part of one surface of the base member 12 in the third direction (Z-axis direction) (e.g., at least a part of a lower surface of the base member 12 as one surface facing the display member 20). The light blocking member 15 may include a material that absorbs or blocks light emitted from the display member 20 to block light incident toward the light blocking member 15.

Accordingly, the cover glass 10 may include, for the base member 12, a light blocking region NDA as a region where the light blocking member 15 is disposed and a display region DA as a region other than the light blocking region NDA. That is, when the light blocking member 15 is disposed on the base member 12, the light blocking area NDA of the cover glass 10 is defined, and light emitted from the display member 20 may be displayed in the display area DA of the display device 1.

In an exemplary embodiment, the light blocking member 15 may be disposed along the periphery of the base member 12, and thus the light blocking area NDA may be disposed to surround the display area DA. The light blocking member 15 may be disposed along the two long sides LS1 and LS2 and the two short sides SS1 and SS2 of the base member 12, and the light blocking region NDA may include a first light blocking region NDA1 disposed adjacent to the two long sides LS1 and LS2 and a second light blocking region NDA2 disposed adjacent to the two short sides SS1 and SS 2.

The first light blocking regions NDA1 may be disposed on both side surfaces of the cover glass 10 in the first direction (X-axis direction) (i.e., disposed on the left and right side surfaces of the cover glass 10), and the second light blocking regions NDA2 may be disposed on both side surfaces of the cover glass 10 in the second direction (Y-axis direction) (i.e., disposed on the upper and lower side surfaces of the cover glass 10). In an exemplary embodiment, each of the first and second light blocking regions NDA1 and NDA2 may be provided with a predetermined width, and for example, the width W2 of the second light blocking region NDA2 may be wider than the width W1 of the first light blocking region NDA 1.

Since the first light blocking region NDA1 is provided with a relatively narrow width W1, the area of the display region DA of the cover glass 10 is increased, thereby allowing more images to be simultaneously transmitted from the display device 1. Since the second light blocking area NDA2 is provided with a relatively wide width W2, a space in which other components (e.g., a speaker and a camera) included in the display apparatus 1 are disposed is secured, or a logo or a pattern is printed, so that the aesthetic sense of the display apparatus 1 may be improved. However, the invention is not limited thereto, and in some cases, at least a portion of the second light blocking region NDA2 is concavely disposed, and thus the second light blocking region NDA2 may partially have a narrow width.

In an exemplary embodiment, the first light blocking region NDA1 adjacent to the two long sides LS1 and LS2 of the base member 12 is longer in one direction than the second light blocking region NDA2 adjacent to the two short sides SS1 and SS2 of the base member 12. As described above, the cover glass 10 includes respective sides having different lengths, and the first and second light blocking regions NDA1 and NDA2 disposed adjacent to the respective sides may have different lengths and may extend in different directions.

Since the light blocking member 15 is disposed on the base member 12, the light blocking area NDA may have various shapes. In an exemplary embodiment, the light blocking member 15 may be provided by printing predetermined ink on the base member 12. In an exemplary embodiment, for example, the ink includes a material that absorbs light or blocks transmission of light, and a pad printing method may be used as a method of printing the ink on the base member 12. The pad printing method is a method in which ink is transferred to printing ink of a target object by contact between the target object and a pad. The ink transferred to the pad may be printed on the target object according to the surface energy between the ink and the target object in the area where the pad contacts the target object and the ink.

Here, the shape of the pad for printing or transferring ink may be changed according to the shape of the target object (e.g., the base member 12 of the cover glass 10). The shape of the pad may be changed according to the two long sides LS1 and LS2 and the two short sides SS1 and SS2 of the base member 12 having different lengths. Further, the shape of the pad may also be changed depending on whether one surface of the base member 12 on which the light blocking member 15 is provided is flat. Details of the shape of the pad will be described later.

A line Ia-Ia' in fig. 2 is a line intersecting the two long sides LS1 and LS2 of the base member 12, and fig. 3 can be understood as showing a cross section of the cover glass 10 including the first light blocking region NDA 1. The light blocking member 15 is shown in fig. 3 as being provided on the base member 12, which may be understood as the lower surface of the cover glass 10 of fig. 2 being turned upside down toward the upper side of fig. 3.

The light blocking member 15 is explained in detail with reference to fig. 2 and 3, and the light blocking member 15 in an exemplary embodiment may include a first light blocking layer 15a, a second light blocking layer 15b, and a third light blocking layer 15 c.

One surface of the base member 12 includes a flat area SA that is horizontal in the first direction (X-axis direction) and a chamfered area CA that is not flat but inclined or rounded, unlike the flat area SA. The chamfered region CA may surround the flat region SA at the outer side of the base member 12, and the cover glass 10 may be substantially flat at the central portion of one surface, and each outer side may have a partially inclined or rounded shape.

The light blocking member 15 may be disposed on the chamfered area CA and a portion of the flat area SA. In an exemplary embodiment, for example, the third light blocking layer 15c may be disposed on the chamfered area CA, and the first and second light blocking layers 15a and 15b may be disposed on the flat area SA. Accordingly, the light blocking region NDA of the cover glass 10 may overlap at least a portion of the chamfered region CA of the base member 12 and the flat region SA of the base member 12.

The first and second light blocking layers 15a and 15b may be disposed on the flat area SA, but may be disposed adjacent to the boundary of the chamfered area CA (i.e., disposed adjacent to the outside of the base member 12). The first light blocking layer 15a may be disposed in direct contact with the base member 12, and the second light blocking layer 15b may be disposed on the first light blocking layer 15 a. In an exemplary embodiment, the width Wb of the second light blocking layer 15b may be shorter than the width Wa of the first light blocking layer 15 a. That is, both sides of the first light blocking layer 15a may be disposed to protrude from both sides of the second light blocking layer 15 b. The first light blocking layer 15a and the second light blocking layer 15b disposed on the flat area SA of the base member 12 may partially overlap each other, and may constitute a flat portion of the light blocking area NDA.

The third light blocking layer 15c may be disposed on the chamfered area CA, and may be disposed on an outermost portion of the base member 12 in a plan view. The third light blocking layer 15c may be disposed in direct contact with the chamfered area CA of the base member 12, and may block transmission of light emitted from the display member 20 and then incident on the chamfered area CA of the base member 12. The width of the third light blocking layer 15c may be smaller than that of the first light blocking layer 15 a. When the light blocking member 15 includes only the first light blocking layer 15a and the second light blocking layer 15b provided on the flat area SA of the base member 12, there may occur a problem that a small amount of light is emitted from the outermost portion of the display device 1 through the chamfered area CA of the base member 12. In order to solve the above problem, the cover glass 10 in the exemplary embodiment includes the third light blocking layer 15c disposed on the chamfered area CA of the base member 12, and thus the light leakage phenomenon of the display device 1 may be prevented.

The structure of the light blocking member 15 may be provided by a first process of forming the first and second light blocking layers 15a and 15b and a second process of forming the third light blocking layer 15c when the cover glass 10 is manufactured.

In an exemplary embodiment, for example, when the light blocking member 15 is formed by a pad printing method, pads of the same shape may come into contact with the flat area SA and the chamfered area CA of the base member 12, respectively, with different pressures. In this case, the ink transferred to the flat area SA may be smoothly printed with the base member 12, but the ink may not be printed on the chamfered area CA, or the adhesive force between the ink and the base member 12 may be weak to be easily affected by external impact.

In an exemplary embodiment, in manufacturing the cover glass 10, the third light blocking layer 15c may be selectively disposed on the chamfered area CA by performing the second process of forming the third light blocking layer 15c using the second pad having a shape different from the shape of the first pad in the first process of forming the first and second light blocking layers 15a and 15 b. Accordingly, the third light blocking layer 15c may be provided with high pressure in the chamfered area CA of the base member 12, and the adhesive force between the third light blocking layer 15c and the base member 12 may be improved.

Hereinafter, exemplary embodiments of a pad printing apparatus for manufacturing the cover glass 10 and a method of manufacturing the cover glass 10 using the same will be described.

FIG. 4 is a schematic perspective view illustrating an exemplary embodiment of a pad printing apparatus including a print pad.

Referring to fig. 4, an exemplary embodiment of a pad printing apparatus 1000 for manufacturing a cover glass 10 may include a printing pad 100, an ink supplier 300, and a stage 500.

The platform 500 may provide a space for providing a target object on which predetermined ink is printed by the pad printing apparatus 1000. In an exemplary embodiment, for example, the platform 500 may have a flat upper surface, but the invention is not limited thereto. The shape of the platform 500 is not limited as long as the platform 500 can fix the target object instead of moving the target object when the printing pad 100 is in contact with the target object. In some cases, platform 500 may include members that are spaced apart from one another to secure a target object between the members. The platform 500 is shown in the drawing as a substrate having a flat upper surface, and on which a target object on which ink is to be printed, i.e., the base member 12 or the cover glass 10, is disposed. The pad printing apparatus 1000 in the exemplary embodiment is an apparatus for manufacturing the cover glass 10 shown in fig. 1 to 3, and the ink supplier 300 and the printing pad 100, which will be described later, may also have a structure and function for manufacturing the cover glass 10 shown in fig. 1 to 3. However, the invention is not limited thereto.

The ink supplier 300 is spaced apart from the stage 500 in a first direction (X-axis direction) and supplies ink to be printed or transferred to a target object. The ink supplied from the ink supplier 300 may come into contact with a printing pad 100, which will be described later, to be transferred to the printing pad 100 and printed or transferred from the printing pad 100 to a target object. Ink may be transferred or printed to any one member by surface energy between other members. In an exemplary embodiment, for example, the printing pad 100 and the ink supplier 300 are brought into contact with each other, and the printing pad 100 and the target object are brought into contact with each other, so that the ink may be printed or transferred from the ink supplier 300 to the target object through the printing pad 100.

The ink supplier 300 may have a predetermined pattern according to a shape in which ink is printed or transferred to a target object. In an exemplary embodiment, in manufacturing the cover glass 10, in order to form the light blocking region NDA only on the periphery of the cover glass 10, the ink supplier 300 may include, for example, a pattern having the same shape as that of the light blocking region NDA. The ink supplier 300 may supply ink through a pattern, and may not supply ink to an area where the pattern is not disposed. Therefore, even when the printing pad 100 is in contact with the pattern and other areas of the ink supplier 300, the ink may be transferred only to the area where the printing pad 100 is in contact with the pattern.

The printing pad 100 may transfer or print the ink supplied from the ink supplier 300 onto a target object.

The printing pad 100 may perform an operation of directly contacting a target object disposed on the stage 500 with the ink supplier 300, thereby printing ink on the target object. The printing pad 100 may be spaced upward from the ink supplier 300 and the stage 500 to perform an operation of moving in a specific direction.

In particular, the printing pad 100 may be engaged with a movable shaft (not shown), and the shaft may perform an operation of moving in a third direction (Z-axis direction) and a first direction (X-axis direction) along which the ink supplier 300 is spaced apart from the stage 500. The printing pad 100 may repeat an operation of moving in a first direction (X-axis direction) and a third direction (Z-axis direction) along an axis to transfer or print the ink of the ink supplier 300 to a target object on the stage 500.

In this case, the printing pad 100 may have a specific shape according to the target object to transmit sufficient pressure to the target object while contacting the target object. Therefore, the ink can be printed or transferred to the target object with sufficient adhesion. The details of the printing pad 100 will be further described with reference to other figures.

Fig. 5 is a perspective view illustrating an exemplary embodiment of a printing pad, fig. 6 is a schematic plan view of the printing pad of fig. 5, fig. 7 is a sectional view taken along line IIa-IIa 'of fig. 5, and fig. 8 is a sectional view taken along line IIIa-IIIa' of fig. 5. Fig. 6 is a plan view of the print pad 100 of fig. 5 viewed in a third direction (Z-axis direction) (e.g., looking up from below the print pad 100). Fig. 7 is a cross-sectional view of the printing pad 100 of fig. 5 taken in a first direction (X-axis direction), and fig. 8 is a cross-sectional view of the printing pad 100 of fig. 5 taken in a second direction (Y-axis direction).

Referring to fig. 5 to 8, the printing pad 100 in an exemplary embodiment may include a clamp portion 110 and a pad portion 120.

The clamp portion 110 may be a base to which the pad portion 120 is attached. The pad portion 120 may be attached to one surface of the clamp portion 110 (e.g., a lower surface of the clamp portion 110 in the drawing), and a shaft (not shown) movable in the first direction (X-axis direction) and the third direction (Z-axis direction) may be coupled to the other surface of the clamp portion 110 (e.g., an upper surface of the clamp portion 110 in the drawing). The pad part 120 attached to the jig part 110 may be in contact with the ink supplier 300 and the target object on the stage 500.

The shape of the clamp portion 110 is not particularly limited. Although the clip portion 110 is shown in the drawings to have a rectangular shape in a plan view, the invention is not limited thereto and the clip portion 110 may have various shapes. However, the clamp portion 110 may have a shape in which the area of the other surface to which the pad portions 120 of the clamp portion 110 are attached is larger than the planar area of the pad portions 120. That is, the jig portion 110 may have a predetermined size such that each outer frame portion of the pad portion 120 does not protrude from the jig portion 110.

When the area of the other surface of the clamp portion 110 is smaller than the area of the pad portion 120, at least a portion of the pad portion 120 may protrude from the clamp portion 110. In this case, when the protruding region of the pad portion 120 is in contact with the ink supplier 300 or the target object, sufficient pressure may not be applied to the contact surface therebetween. The portion of the target object in contact with the protruding portion of the pad portion 120 may not be sufficiently adhered to the ink, and thus is easily affected by external impact. Therefore, in order to prevent this problem, in the jig portion 110 in the exemplary embodiment, the area of the other surface to which the pad portions 120 of the jig portion 110 are attached may be larger than the planar area of the pad portions 120.

The pad portion 120 may include a body portion 125 having one surface attached to the jig portion 110, and outer frame portions 121, 122, 123, and 124 provided by protruding a portion of the other surface of the body portion 125. The body portion 125 and the outer frame portions 121, 122, 123, and 124 refer to specific positions or regions of the pad portion 120, and do not indicate: the body portion 125 and the outer frame portions 121, 122, 123, and 124 are provided as separate members, and the separate members are coupled or joined to each other to constitute the pad portion 120. That is, in the present specification, in order to individually describe a specific position or region of the pad portion 120, the corresponding region is referred to as a "body portion" or an "outer frame portion". Basically, the body portion 125 and the outer frame portions 121, 122, 123 and 124 are integrated to constitute one pad portion 120. However, the invention is not limited thereto.

The pad portion 120 may include a stretchable material such as silicon rubber. As will be described later, when ink is printed on a target object (e.g., the base member 12) using the printing pad 100, the pad portion 120 of the printing pad 100 is in contact with the target object. Here, since the pad section 120 includes a stretchable material, the pad section 120 may apply a predetermined pressure to an area contacting the target object, and thus the shape of the pad section 120 may be compressed or stretched.

One surface of the body portion 125 of the pad portion 120 may be attached to the jig portion 110, and the other surface of the body portion 125 may be provided with outer frame portions 121, 122, 123, and 124. Since the outer frame portions 121, 122, 123, and 124 have a protruding shape, the body portion 125 may be a recessed area compared to the outer frame portions 121, 122, 123, and 124 in the printing pad 100.

When the printing pad 100 contacts the target object, the body portion 125 may perform the function of interconnecting and supporting the outer frame portions 121, 122, 123, and 124 without directly contacting the target object. However, the invention is not limited thereto, and in some cases, in the printing pad 100, the body portion 125 may be omitted, and the outer frame portions 121, 122, 123, and 124 may be separately disposed to be spaced apart from each other.

The shape of the body portion 125 is not particularly limited, but the body portion 125 may have a shape of: for transmitting the pressing force transmitted through the clamp portion 110 to the outer frame portions 121, 122, 123 and 124 when the shaft (not shown) is moved in the third direction (Z-axis direction). That is, the body portion 125 may have substantially the same shape as the shape of the clamp portion 110, and the planar size of the body portion 125 may be smaller than the planar size of the clamp portion 110. In an exemplary embodiment, in the printing pad 100 of the pad printing apparatus 1000, the body portion 125 may have various shapes according to the shape of the cover glass 10 as a target object to which ink is to be printed or transferred. In an exemplary embodiment, as shown in the drawings, the body portion 125 may have, for example, a rectangular shape in which respective sides face each other, and corners at which the respective sides meet each other may be bent in a rounded shape. However, the invention is not limited thereto.

The outer frame portions 121, 122, 123, and 124 are disposed on the other surface of the body portion 125 such that they face a target object to which ink is to be printed or transferred. When the printing pad 100 contacts the target object, the outer frame portions 121, 122, 123, and 124 may be regions directly contacting the target object. The outer frame portions 121, 122, 123, and 124 may prevent the body portion 125 from contacting the ink supplier 300, and the ink may be selectively printed or transferred only to the areas contacting the outer frame portions 121, 122, 123, and 124.

In an exemplary embodiment of the printing pad 100, the outer frame portions 121, 122, 123, and 124 may have a shape in which at least a portion of the body portion 125 protrudes in one direction, and ink may be selectively printed only to the chamfered area CA of the cover glass 10. As shown in the drawings, the outer frame portions 121, 122, 123, and 124 protrude from the outside of the body portion 125 in the third direction (Z-axis direction) to have a shape with a predetermined height. Further, the outer frame portions 121, 122, 123, and 124 may extend in a first direction (X-axis direction) or a second direction (Y-axis direction) along which the outer side of the body portion 125 extends, and may be connected to each other at corners at which the outer frame portions 121, 122, 123, and 124 cross each other to be integrated into one member.

That is, the printing pad 100 may have a shape in which a central portion of a three-dimensional structure having a predetermined volume is concavely recessed and outer portions thereof are relatively protruded to form a mountain peak. In an exemplary embodiment, the protruding outer portion may surround the concavely recessed central portion, and one end of the protruding outer portion may be inclined at a predetermined inclination or may be rounded at a predetermined curvature.

More specifically, in the body portion 125 of the printing pad 100, one surface 125a contacting the jig portion 110 and the other surface 125b provided with the outer frame portions 121, 122, 123, and 124 may be relatively flat surfaces. Since each of the outer frame portions 121, 122, 123, and 124 has a predetermined thickness, the other surface 125b of the body portion 125 may have an area smaller than that of the one surface 125a of the body portion 125. As shown in the sectional views of fig. 7 and 8, an outer portion of the other surface 125b of the body portion 125 contacting the outer frame portions 121, 122, 123, and 124 may be recessed from an outer portion of the one surface 125a of the body portion 125 toward an inner side of the body portion 125. A space surrounded by the outer frame portions 121, 122, 123, and 124 is defined on the other surface 125b of the body portion 125, and thus the other surface 125b of the body portion 125 may not contact the target object or the ink supplier 300.

The outer frame portions 121, 122, 123, and 124 may include a first outer frame portion 121 and a third outer frame portion 123 extending in the first direction (X-axis direction) and spaced apart from each other to face each other, and a second outer frame portion 122 and a fourth outer frame portion 124 extending in the second direction (Y-axis direction) and spaced apart from each other to face each other. However, as described above, the printing pad 100 is provided as one member by an integral member, and the outer frame portions 121, 122, 123, and 124 may also be expressed according to their positions for convenience of explanation. The outer frame portions 121, 122, 123, and 124 may be integral at the corners where they meet each other, and thus each corner may have an angled shape. However, the invention is not limited to this, and each corner may be rounded.

The first and third outer frame portions 121 and 123 are outer frame portions disposed on the upper and lower side surfaces of the pad portion 120 in plan view, and the second and fourth outer frame portions 122 and 124 are outer frame portions disposed on the right and left side surfaces of the pad portion 120 in plan view. In an exemplary embodiment, the respective outer frame portions (e.g., the first and third outer frame portions 121 and 123 and the second and fourth outer frame portions 122 and 124) of the pad portions 120 may extend to have different lengths from each other.

As will be described later, each of the outer frame portions 121, 122, 123, and 124 may be brought into contact with the chamfered area CA of the cover glass 10 as an object to be printed to print or transfer ink. The printed ink may form the light blocking regions NDA of the cover glass 10, and the cover glass 10 in the exemplary embodiment may include first and second light blocking regions NDA1 and NDA2 having different lengths from each other. Since the ink is printed or transferred in the region where the printing pad 100 and the target object (e.g., the base member 12 of the cover glass 10) contact each other to form the light blocking region NDA, the shape of each of the outer frame portions 121, 122, 123, and 124 of the pad portion 120 may be changed according to the shape of the light blocking region NDA.

In an exemplary embodiment, for example, the lengths LL1 and LL3 of the first and third outer frame portions 121 and 123 extending in the first direction (X-axis direction) may be shorter than the lengths LL2 and LL4 of the second and fourth outer frame portions 122 and 124 extending in the second direction (Y-axis direction). In an exemplary embodiment, for example, when a target object to which ink is to be printed or transferred has a rectangular shape including two long sides and two short sides, and predetermined ink is printed or transferred to the long and short sides, the outer frame portions 121, 122, 123, and 124 of the pad portion 120 may have lengths different from each other according to the shapes of the long and short sides. In order to form the light blocking member 15 in the light blocking region NDA of the cover glass 10 shown in fig. 1 to 3, the lengths of the first and third outer frame portions 121 and 123 of the pad portion 120 may be shorter than the lengths of the second and fourth outer frame portions 122 and 124 of the pad portion 120 depending on the lengths of the two long sides LS1 and LS2 and the two short sides SS1 and SS2 of the base member 12. That is, the first and third outer frame portions 121 and 123 may contact the first and second short sides SS1 and SS2 of the base member 12 of fig. 1 to 3, and the second and fourth outer frame portions 122 and 124 may contact the first and second long sides LS1 and LS2 of the base member 12.

The outer and inner side walls of each of the outer frame portions 121, 122, 123, and 124 may extend in the third direction (Z-axis direction) to be connected to the body portion 125. The shapes of the outer and inner sidewalls are not particularly limited, but in exemplary embodiments, the outer and inner sidewalls may be inclined with respect to the body portion 125 to have an acute inclination. That is, each of the outer frame portions 121, 122, 123, and 124 may have a shape in which its width gradually narrows as they extend in the third direction (Z-axis direction).

One end of each of the outer frame portions 121, 122, 123, and 124 contacting the target object may have a width narrower than a region connected to the body portion 125. When the printing pad 100 is brought into contact with a target object to print or transfer ink, a contact area of the printing pad 100 with the target object may be small in order to print or transfer ink only onto a narrow area of the target object. The pad portion 120 of the printing pad 100 in the exemplary embodiment may have a shape in which the width of each of the outer frame portions 121, 122, 123, and 124 is narrowed toward one end thereof. Accordingly, the contact area of each of the outer frame portions 121, 122, 123, and 124 of the pad portion 120 with the target object may be narrow.

One end of each of the outer frame portions 121, 122, 123, and 124 may have a predetermined central angle and a side surface inclined due to the narrowing of the width thereof, but the invention is not limited thereto. In an exemplary embodiment, as shown in the drawings, for example, one end of each of the outer frame portions 121, 122, 123, and 124 may be rounded with a predetermined curvature.

In another exemplary embodiment, unlike the pad portions 120 shown in fig. 5, the pad portions 120 may not be integral and may be disposed such that the outer frame portions 121, 122, 123, and 124 are spaced apart from each other. As described above, since the target object to be printed has a rectangular shape, when the length extending in the first direction (X-axis direction) is different from the length extending in the second direction (Y-axis direction), the printing process may be performed with pads different from each other in the region extending in the first direction (X-axis direction) and the region extending in the second direction (Y-axis direction). Their detailed description refers to another exemplary embodiment.

As described above, the base member 12 of the cover glass 10 may include the flat area SA and the chamfered area CA, and the light blocking member 15 may be disposed on at least a portion of the flat area SA and the chamfered area CA. In the flat area SA of the base member 12, even when a pad having a shape different from that of the printing pad 100 of fig. 5 to 8 is used, contact between the pad and the base member 12 is easy, so that the first light blocking layer 15a and the second light blocking layer 15b disposed on the flat area SA may have sufficient durability and adhesive force. However, in the chamfered area CA of the base member 12, when a conventional pad is used, direct contact between the pad and the base member 12 is difficult, so that the third light blocking layer 15c provided on the chamfered area CA may not have sufficient durability, and thus the third light blocking layer 15c may be damaged in some cases.

In an exemplary embodiment, the pad portion 120 of the printing pad 100 may be in contact with the base member 12 of the cover glass 10, and a contact area between the pad portion 120 and the base member 12 may include at least the chamfered area CA of the base member 12.

The printing pad 100 in the exemplary embodiment may cause smooth contact between the chamfered region CA of the base member 12 and the pad portion 120, and may improve durability and adhesive force of the third light blocking layer 15c disposed on the chamfered region CA. Because one end of each of the outer frame portions 121, 122, 123, and 124 of the printing pad 100 may directly contact the chamfered area CA of the base member 12, the outer frame portions 121, 122, 123, and 124 may apply relatively high pressure to cause ink to be printed or transferred to the chamfered area CA. Therefore, the ink printed or transferred on the chamfered area CA may form the third light blocking layer 15c having high durability and adhesive force.

The method of manufacturing the cover glass 10 in an exemplary embodiment may include forming a third light blocking layer 15c on the chamfered area CA using the printing pad 100 of fig. 5 to 8. Hereinafter, a method of manufacturing the cover glass 10 in the exemplary embodiment will be described in detail.

Fig. 9 is a flow chart illustrating an exemplary embodiment of a method of manufacturing a cover glass.

Referring to fig. 9, the method of manufacturing a cover glass 10 in an exemplary embodiment includes an operation (S100) of providing a base member 12 and an operation (S200) of forming a first light blocking layer 15a and a third light blocking layer 15c, the base member 12 including a flat area SA having one surface thereof parallel to a first direction (X-axis direction) and a chamfered area CA adjacent to the flat area SA and not parallel to the first direction (X-axis direction), the first light blocking layer 15a being disposed on at least a portion of the flat area SA adjacent to the chamfered area CA, the third light blocking layer 15c being disposed on at least a portion of the chamfered area CA and partially contacting one end of the first light blocking layer 15 a.

The method of manufacturing the cover glass 10 in the exemplary embodiment may include a first process of forming the first light blocking layer 15a or the first and second light blocking layers 15a and 15b on the flat area SA and a second process of forming the third light blocking layer 15c on the chamfered area CA. That is, the method of manufacturing the cover glass 10 may include an operation (S210) of forming the first light blocking layer 15a or the first and second light blocking layers 15a and 15b through processes different from each other and an operation (S220) of forming the third light blocking layer 15 c.

First, an operation of forming the first and second light blocking layers 15a and 15b (S210) will be described.

FIG. 10 is a flow chart illustrating an exemplary embodiment of a portion of a method of manufacturing a cover glass. Fig. 11 to 17 are sectional views illustrating the manufacturing method of fig. 10.

Referring to fig. 10 to 17, the operation (S210) of forming the first and second light blocking layers 15a and 15b may include: an operation (S211) of bringing the first pad 101 contacting the flat area SA into contact with at least a part of the flat area SA and transferring the first light blocking ink 15a' to the contact area; an operation (S212) of drying the first light blocking ink 15a' to form the first light blocking layer 15 a; an operation (S213) of bringing the first pad 101 into contact with at least a portion of the first light blocking layer 15a and transferring the second light blocking ink 15b' to the contact area; and an operation (S214) of drying the second light blocking ink 15b' to form the second light blocking layer 15 b.

As shown in fig. 11, the base member 12 including the flat area SA (refer to fig. 3) and the chamfered area CA (refer to fig. 3) is provided on the stage 500 (S100). Since the detailed description of the base member 12 is the same as that of the base member 12 already described above, redundant description will be omitted. The upper surface of the base member 12 is shown in the drawing to include a flat area SA parallel to the first direction (X-axis direction) and a chamfered area CA disposed adjacent to the flat area SA and at least partially inclined. However, the invention is not limited to this, and the base member 12 may be greatly inclined or may be rounded.

Next, as shown in fig. 12 to 14, the first light-blocking ink 15a' is transferred onto the flat area SA of the base member 12 using the first pad 101 (S211). In an exemplary embodiment, the operation of forming the first light blocking layer 15a may be performed using the first pad 101 of which at least a portion of the outer surface is flat and smoothly rounded and the central portion thereof is not recessed. Unlike the printing pad 100, which has been described with reference to fig. 5 to 8, the outer surface of the first pad 101 is not recessed, and thus the first pad 101 may be completely in contact with the ink supplier 300.

However, as shown in the drawing, only the ink (e.g., the first light blocking ink 15a 'or the second light blocking oil 15b') is transferred from the center portion to the outer portion of the first pad 101, thereby forming the first light blocking layer 15a and the second light blocking layer 15b disposed on the outer portion adjacent to the chamfered region CA in the flat region SA of the base member 12. The ink I may be transferred to the outer portion of the first pad 101 and the base member 12 may be brought into contact with each other, thereby printing or transferring the first light blocking ink 15a' onto the base member 12.

In an exemplary embodiment, the ink I may include a material that absorbs incident light or blocks transmission of light. That is, the ink I may include substantially the same material as that of the light blocking member 15. Further, the first pad 101 and a second pad 102 or a printing pad 100, which will be described later, may include a flexible material whose shape is changed by an external force. As shown in the drawing, when the first pad 101 is in contact with the base member 12, the first pad 101 may be expanded in a direction perpendicular to the compression force by the compression force. Therefore, the area where the first pad 101 and the base member 12 contact each other may be larger than the area where the first light blocking ink 15a' is printed. In an exemplary embodiment, the first pad 101, the second pad 102, or the printing pad 100 may include a material such as silicon rubber, for example. However, the invention is not limited thereto.

Next, as shown in fig. 15, an operation of drying the transferred first light blocking ink 15a' to form a first light blocking layer 15a is performed (S212). The first light blocking ink 15a' may have a formulation of a solution having fluidity. When the first light blocking layer 15a is provided without drying the first light blocking ink 15a ', the first light blocking ink 15a ' may be transferred to the first pad 101 again, or the shape of the first light blocking ink 15a ' may be damaged. Accordingly, the first light blocking ink 15a 'is transferred and then the first light blocking ink 15a' is dried to form the first light blocking layer 15 a.

In an exemplary embodiment, drying the first light blocking ink 15a' may be performed at a temperature of, for example, about 60 ℃ to about 80 ℃. In an exemplary embodiment, drying the first light blocking ink 15a' may be performed using heat H. However, the invention is not limited thereto.

Next, similarly to the method of forming the first light blocking layer 15a, the second light blocking ink 15b 'is transferred using the first pad 101 (S213), and then the second light blocking ink 15b' is dried to form the second light blocking layer 15b (S214). A detailed description thereof will be described. However, as described above, since the width Wb of the second light blocking layer 15b is narrower than the width Wa of the first light blocking layer 15a, both ends of the first light blocking layer 15a may protrude from both ends of the second light blocking ink 15b 'in the operation of transferring the second light blocking ink 15 b'.

Next, an operation (S220) of forming the third light blocking layer 15c on the base member 12 provided with the first light blocking layer 15a and the second light blocking layer 15b will be described.

Fig. 18 is a flowchart illustrating an exemplary embodiment of a method of forming a third light blocking layer. Fig. 19 to 21 are sectional views according to the flowchart of fig. 18.

Referring to fig. 18 to 21, the operation (S220) of forming the third light blocking layer 15c may include: an operation (S221) of contacting the second pad 102 to at least a portion of the chamfered region CA of the base member 12 to transfer the third light blocking ink 15c' to the contact region, the second pad 102 contacting the chamfered region CA and having a shape different from that of the first pad 101; and an operation of drying the third light blocking ink 15c' to form a third light blocking layer 15c (S222).

In the operation (S221) of forming the third light blocking layer 15c, unlike the first pad 101, a concavely recessed central portion may be defined in the second pad 102. In an exemplary embodiment, the second pad 102 may be the printing pad 100 of fig. 5-8. That is, the second pad 102 may include a body portion 125 and outer frame portions 121, 122, 123, and 124. Since the shape of the second pad 102 is substantially the same as that of the printing pad 100, a detailed description thereof will be omitted.

In an exemplary embodiment, at least the second pad 102 (i.e., the printing pad 100) may be brought into contact with the chamfered area CA of the base member 12, and one end of each of the outer frame portions 121, 122, 123, and 124 of the printing pad 100 may be brought into contact with the chamfered area CA. As shown in the drawing, only the ink I supplied from the ink supplier 300 is transferred to one end of the outer frame portions 121, 122, 123, and 124, and this end is selectively brought into contact with the chamfered region CA to transfer the ink I onto the contacted chamfered region CA, thereby obtaining the third light blocking ink 15 c'. Then, an operation of drying the third light blocking ink 15c' to form the third light blocking layer 15c is performed (S222). Since a method of forming the third light blocking layer 15c by transferring the third light blocking ink 15c 'and drying the third light blocking ink 15c' is substantially the same as the method of forming the first and second light blocking layers 15a and 15b, a detailed description thereof will be omitted.

In the exemplary embodiment of the printing pad 100, the ink I transferred to one end of each of the outer frame portions 121, 122, 123, and 124 may be selectively printed on the chamfered area CA, and the third light blocking layer 15c may be selectively provided in the chamfered area CA of the base member 12. Unlike the first pad 101, the printing pad 100 may apply a high pressure to the chamfered area CA having a relatively narrow area, and thus the third light blocking layer 15c disposed in the chamfered area CA may have a high adhesive force to the base member 12.

In an exemplary embodiment, the operation of drying the third light blocking ink 15c' may be performed at a temperature of, for example, about 150 ℃ to about 180 ℃ (S222). In an exemplary embodiment, drying the third light blocking ink 15c 'may be performed by heat H'. Since the operation of drying the third light blocking ink 15c ' is performed at a higher temperature (S222) than the operation of drying the first light blocking ink 15a ' (S212) and the operation of drying the second light blocking ink 15b ' (S214), the first light blocking ink 15a ' and the second light blocking ink 15b ' that are not completely dried may be dried. However, the invention is not limited thereto.

By the above method, the cover glass 10 in the exemplary embodiment can be manufactured. On the base member 12 including the flat area SA and the chamfered area CA, the light blocking member 15 may be provided on each of the flat area SA and the chamfered area CA using the first pad 101 and the second pad 102 or the first pad 101 and the printing pad 100 having different shapes from each other. That is, when pads having different shapes from each other are used so that sufficient pressure can be applied to specific regions of the base member 12 having different shapes, the light blocking member 15 disposed on each region may have sufficient adhesive force.

The method of manufacturing the cover glass using the pad printing apparatus 1000 is not limited thereto. In some cases, the process of forming the first and second light blocking layers 15a and 15b may be performed after the process of forming the third light blocking layer 15 c.

FIG. 22 is a flow chart illustrating another exemplary embodiment of a method of manufacturing a cover glass.

Referring to fig. 22, the operation of forming the third light blocking layer 15c may be prior to the operation of forming the first and second light blocking layers 15a and 15 b. That is, the method of manufacturing the cover glass 10 (i.e., operation S300) in another exemplary embodiment may include: an operation (S310) of providing the base member 12; an operation (S320) of forming a third light blocking layer 15 c; and an operation (S330) of forming the first and second light blocking layers 15a and 15 b. In the method of manufacturing the cover glass 10, as shown in fig. 22, a third light blocking layer 15c, a first light blocking layer 15a, and a second light blocking layer 15b may be sequentially provided on the base member 12.

When the third light blocking layer 15c is disposed in the chamfered area CA of the base member 12 using the printing pad 100, the outer frame portions 121, 122, 123, and 124 of the pad portion 120 of the printing pad 100 are in contact with the first and second light blocking layers 15a and 15b, and thus the third light blocking layer 15c may be stepped. Therefore, in the process of attaching the cover glass 10 to another member (for example, the display member 20), bubbles may be generated due to the step provided by the light blocking member 15. Therefore, in a method of manufacturing the cover glass 10 in another exemplary embodiment, the third light blocking layer 15c is first disposed on the chamfered area CA, and the first and second light blocking layers 15a and 15b are disposed on the flat area SA, thereby minimizing steps that may be disposed on the cover glass 10.

In this case, although not shown in the drawings, for example, the operation of drying the third light blocking ink 15c 'may be performed at a temperature of about 60 degrees celsius (° c) to about 80 ℃, and the operation of drying the second light blocking ink 15b' may be performed at a temperature of about 150 ℃ to about 180 ℃. That is, in the method of manufacturing the cover glass 10, the operation of drying the light blocking ink to form the final light blocking layer may be performed at a higher temperature than the operation of drying the light blocking ink to form the other light blocking layer. However, the invention is not limited thereto.

Further, as described above, in the exemplary embodiment of the cover glass 10, the base member 12 on which the light blocking member 15 is disposed may include two long sides LS1 and LS2 and two short sides SS1 and SS 2. Therefore, in the operation of forming the third light blocking layer 15c, the third light blocking layer 15c may be provided on both long sides LS1 and LS2 of the base member 12, and the third light blocking layer 15c may also be provided on both short sides SS1 and SS2 of the base member 12 using another printing pad 100. That is, the outer frame portions 121, 122, 123, and 124 of the pad portion 120 having different lengths from each other may be separated by the printing pads 100 different from each other, thereby forming the third light blocking layer 15c, respectively.

Fig. 23 and 24 are schematic views illustrating other exemplary embodiments of the printing pad.

Referring to fig. 23 and 24, the printing pad 100_1 may include a first printing pad 100a _1 for printing the chamfered areas CA (refer to fig. 3) of the two long sides LS1 and LS2 (refer to fig. 2) of the base member 12 and a second printing pad 100b _1 for printing the chamfered areas CA of the two short sides SS1 and SS2 (refer to fig. 2) of the base member 12. That is, in an exemplary embodiment, the length L1 that each of the outer frame portions 122a and 124a of the pad portion 120a _1 of the first print pad 100a _1 extends in one direction may be longer than the length L2 that each of the outer frame portions 121b and 123b of the pad portion 120b _1 of the second print pad 100b _1 extends in one direction.

Accordingly, the operation of forming the third light blocking layer 15c (refer to fig. 3) may include an operation of forming a 3-1 light blocking layer on the two long sides LS1 and LS2 of the base member 12 using the first printing pad 100a _1 and an operation of forming a 3-2 light blocking layer on the two short sides SS1 and SS2 of the base member 12 using the second printing pad 100b _ 1. That is, the method of manufacturing the cover glass 10 may include an operation of forming the first light blocking layer 15a, an operation of forming the second light blocking layer 15b, an operation of forming the 3-1 light blocking layer, and an operation of forming the 3-2 light blocking layer, and, in the method, a total of four printing and transfer processes may be performed.

As described above, the pad portion 120 (refer to fig. 5) of the printing pad 100 may not be provided with the main body portion 125. In this case, the pad portion 120 may include only the outer frame portions 121, 122, 123, and 124, and the outer frame portions 121, 122, 123, and 124 may be provided by separate pads, respectively, and may be spaced apart from each other.

FIG. 25 is a schematic diagram illustrating another exemplary embodiment of a print pad.

Referring to fig. 25, the print pad 100_2 may include only the outer frame portions 121_2, 122_2, 123_2, and 124_2 of the pad portion 120_2 without providing the body portion 125. Since the printing pad 100_2 of fig. 25 is the same as the printing pad 100 of fig. 5 except that the main body portion 125 is not provided, a detailed description thereof will be omitted. The shape of the printing pad 100_2 not provided with the main body portion 125 is not limited thereto, and in some cases, the printing pad 100a _1 of fig. 23 and the printing pad 100b _1 of fig. 24 may not be provided with the main body portion 125.

In the cover glass 10 (refer to fig. 1), a greater number of regions may be inclined or rounded in addition to the chamfered regions CA (refer to fig. 3) provided outside the base member 12.

Fig. 26 is a schematic view showing another exemplary embodiment of a cover glass. Fig. 27 is a sectional view taken along line Ib-Ib' of fig. 26.

Referring to fig. 26 and 27, the base member 12_3 of the cover glass 10_3 in another exemplary embodiment may further include a bent area BA _3 inclined at a predetermined angle between the flat area SA _3 and the chamfered area CA _ 3. Accordingly, the third light blocking layer 15c _3 of the cover glass 10_3 is disposed only in the chamfered area CA _3 without defining the first and second light blocking areas NDA1_3 and NDA2_ 3. The first and second light blocking layers 15a _3 and 15b _3 of the first light blocking region NDA1_3 may be disposed only in the curved region BA _3, and the first and second light blocking layers 15a _3 and 15b _3 of the second light blocking region NDA2_3 may be disposed on the flat region SA _3 and the curved region BA _ 3. That is, since the width W1_3 of the first light blocking region NDA1_3 disposed on the two long sides LS1 and LS2 of the base member 12_3 is narrower than the width W2_3 of the second light blocking region NDA2_3, the first light blocking layer 15a _3 and the second light blocking layer 15b _3 of the first light blocking region NDA1_3 may be disposed only in the bending region BA _ 3. Therefore, when the first pad 101 forming the first and second light blocking layers 15a _3 and 15b _3 is in contact with the long sides LS1 and LS2 and the short sides SS1 and SS2, different amounts of ink I can be transferred.

However, in the case of the third light blocking layer 15c _3 provided on the chamfered area CA _3, the ink I may be transferred only to the chamfered area CA _3 having a relatively narrow area. The more detailed description thereof is the same as described above.

As described above, in an exemplary embodiment of the cover glass printing pad, the light blocking ink may be printed on the partially inclined or rounded cover glass.

In addition, the cover glass may be manufactured using a cover glass printing pad, on which light blocking ink is easily printed on a partially inclined or rounded region of the cover glass.

The effects of the invention are not limited by the foregoing, and other various effects are contemplated herein.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

At the conclusion of the detailed description, those skilled in the art will appreciate that many changes and modifications may be made to the preferred embodiments without substantially departing from the principles of the invention. Accordingly, the disclosed preferred embodiments of the invention are used in a generic and descriptive sense only and not for purposes of limitation.