阅读说明：本技术 成像薄膜 (Imaging film ) 是由 张健 于 2015-10-14 设计创作，主要内容包括：本申请实施例公开了一种成像薄膜。该成像薄膜包括：本体,由聚合物制成,所述聚合物为光固化胶或热固化胶；聚焦结构,形成于所述本体的一侧；图文结构,形成于所述本体的内部,所述图文结构的材料为着色材料、染色材料、金属材料或导电材料,所述图文结构的颜色与所述聚合物的颜色不同；其中,所述图文结构与所述聚焦结构相适配,所述图文结构通过所述聚焦结构成像。本申请实施例所提供的技术方案,可以减小成像薄膜的厚度,有利于成像薄膜的转印。(The embodiment of the application discloses an imaging film. The imaging film includes: the body is made of polymer, and the polymer is light curing glue or heat curing glue; the focusing structure is formed on one side of the body; the picture and text structure is formed inside the body, the material of the picture and text structure is a coloring material, a dyeing material, a metal material or a conductive material, and the color of the picture and text structure is different from that of the polymer; the image-text structure is matched with the focusing structure, and the image-text structure is imaged through the focusing structure. According to the technical scheme provided by the embodiment of the application, the thickness of the imaging film can be reduced, and transfer printing of the imaging film is facilitated.)

1. An imaging film, comprising:

the body is made of polymer, and the polymer is light curing glue or heat curing glue;

the focusing structure is formed on one side of the body;

the picture and text structure is formed inside the body, the material of the picture and text structure is a coloring material, a dyeing material, a metal material or a conductive material, and the color of the picture and text structure is different from that of the polymer;

the image-text structure is matched with the focusing structure, and the image-text structure is imaged through the focusing structure.

2. The imaging film as claimed in claim 1, wherein the graphic structure is formed inside the body by evaporation, sputtering, screen printing, transfer printing, embossing or trench filling.

3. An imaging film as claimed in claim 1, wherein the body is formed from a first portion and a second portion of the polymer, the graphic structure being formed in the first portion, the graphic structure being located between the first portion and the second portion, the first portion and the second portion being fused together by the same polymer.

4. The imaging film as claimed in claim 3, wherein a receiving structure is formed on one side of the first portion, the receiving structure is filled with a filler to form the graphic structure, the second portion is formed on the side of the first portion where the graphic structure is located, and the filler is a material having a refractive index difference with the polymer with respect to light.

5. An imaging film according to claim 1 wherein the graphic structure comprises a plurality of identical graphic elements in the form of graphics, text, numbers, grids, landscapes, trademarks and/or logos.

6. The imaging film as claimed in claim 1, wherein the image-text structure includes micro-patterns, the focusing structure includes micro-lenses, and the micro-patterns and the micro-lenses are disposed in a one-to-one correspondence.

7. The imaging film of claim 1, wherein a spacing structure is formed between the focusing structure and the body.

8. An imaging film according to claim 1, wherein the graphic structure comprises a plurality of graphic elements, the focusing structure comprises a plurality of focusing elements, the position coordinates of the graphic elements are obtained from the position coordinates of the focusing elements through a predetermined transformation, and the predetermined transformation comprises a coordinate scaling transformation or a coordinate rotation transformation, or a combination thereof.

9. The imaging film according to claim 8, wherein the ratio of the area of the focusing structure on the surface of the body to the total area of the surface of the body is called duty ratio, and the total area occupied by the focusing units in the focusing structure is more than 60% of the total area of the surface of the body.

10. The imaging film as claimed in claim 8, wherein the focusing units are randomly arranged, the image-text units are randomly arranged, the imaging film presents a unique floating image, and the height of the floating image satisfies:

wherein d is_iIs the height of the suspended image of the graphic unit, R is the curvature radius of the focusing unit, f is the focal length of the focusing unit, x_MLACoordinate value, x, representing a focusing element_MPACoordinate values representing the teletext cells.

Technical Field

The invention relates to the technical field of optical films, in particular to an imaging film.

Background

Moir technology is an attractive new type of visual security technology. The method utilizes the focusing effect of the micro-lens array to amplify the micro-pattern with high efficiency, and realizes the pattern with certain depth of field and peculiar dynamic effect.

Disclosure of Invention

It is an object of embodiments of the present application to provide an imaging film that achieves the goal of reducing the thickness of the imaging film.

In order to solve the above technical problem, an embodiment of the present application provides an imaging film implemented by:

the embodiment of the application provides an imaging film, includes:

the body is made of polymer, and the polymer is light curing glue or heat curing glue;

the focusing structure is formed on one side of the body;

the picture and text structure is formed inside the body, the material of the picture and text structure is a coloring material, a dyeing material, a metal material or a conductive material, and the color of the picture and text structure is different from that of the polymer;

the image-text structure is matched with the focusing structure, and the image-text structure is imaged through the focusing structure.

In one embodiment, the image-text structure is formed inside the body by evaporation, sputtering, screen printing, transfer printing, embossing or groove filling.

In one embodiment, the body is formed from a first part and a second part of the polymer, the graphic structure being formed in the first part, the graphic structure being located between the first part and the second part, the first part and the second part being fused together by the same polymer.

In an embodiment, a receiving structure is formed on one side of the first portion, a filler is filled in the receiving structure to form the graphic structure, the second portion is formed on the side of the graphic structure in the first portion, and the filler is a material having a refractive index difference with the polymer to light.

In one embodiment, the graphic structure comprises a plurality of same graphic units, and the graphic units are patterns formed by graphics, characters, numbers, grids, scenic drawings, trademarks and/or logos.

In an embodiment, the image-text structure includes a micro pattern, the focusing structure includes micro lenses, and the micro pattern and the micro lenses are arranged in a one-to-one correspondence.

In an embodiment, a spacing structure is formed between the focusing structure and the body.

In an embodiment, the teletext structure comprises a plurality of teletext elements, the focus structure comprises a plurality of focus elements, and the position coordinates of the teletext elements are obtained from the position coordinates of the focus elements through a preset transformation, which may comprise a coordinate scaling transformation or a coordinate rotation transformation, or a combination thereof.

In one embodiment, a ratio of an area of the focusing structure on the surface of the body to a total area of the surface of the body is called a duty ratio, and the total area occupied by the focusing units in the focusing structure is more than 60% of the total area of the surface of the body.

In one embodiment, the focusing units are randomly arranged, the image-text units are randomly arranged, the imaging film presents a unique suspended image, and the height of the suspended image satisfies:

wherein d is_iIs the height of the suspended image of the graphic unit, R is the curvature radius of the focusing unit, f is the focal length of the focusing unit, x_MLACoordinate value, x, representing a focusing element_MPACoordinate values representing the teletext cells.

According to the technical scheme provided by the embodiment of the application, the image-text structure is formed in the body, so that the purpose of reducing the thickness of the imaging film is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without any creative effort.

FIG. 1 is a schematic diagram of a structure of an imaging film provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of another structure of an imaged film provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of another structure of an imaged film provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of another structure of an imaged film provided by an embodiment of the present application;

FIG. 5 is a schematic view of another embodiment of an imaged film provided by embodiments of the present application;

FIG. 6 is a schematic diagram of a graphic element in an imaging film according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of an imaging film with reflective structures provided in an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a focusing structure in an imaging film provided by an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of another configuration of a focusing structure in an imaging film provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of a structure corresponding to the focus structure of FIG. 8;

FIG. 11 is a schematic diagram of a structure corresponding to the focus structure of FIG. 9;

FIG. 12 is a schematic diagram of imaging thin film floating imaging provided by embodiments of the present application;

FIG. 13 is a diagram of 3D imaging visual effects of an imaged film provided by embodiments of the present application;

FIG. 14 is a flowchart illustrating steps in a method for forming an imaged film according to an embodiment of the present disclosure.

FIG. 15 is a flowchart illustrating steps in a method for forming an imaged film according to an embodiment of the present disclosure.

FIG. 16 is a flow chart illustrating steps in another method for forming an imaged film as provided in an embodiment of the present application.

FIG. 17 is a flow chart illustrating steps in another method for forming an imaged film as provided in an embodiment of the present application.

Detailed Description

The embodiment of the application provides an imaging film and a preparation method thereof.

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The embodiment of the application provides an imaging film, includes: a body made of the same polymer; a focusing structure is formed on one surface of the body; an image-text structure is formed inside the body and is imaged through the focusing structure. Therefore, the imaging film provided by the embodiment of the application has no substrate, so that the aim of reducing the thickness of the imaging film can be fulfilled.

The following provides a detailed description of the imaging film provided in the embodiments of the present application with reference to the drawings.

As shown in fig. 1, the imaging film includes a body 101 made of a polymer, a focusing structure 201 formed on one surface of the body 101, and a pattern structure 301 formed inside the body 101. The teletext structure 301 may be imaged by the focus structure 201.

The polymer can be a single polymer or a mixed polymer formed by mixing a plurality of non-reactive single polymers. The polymer may have a light transmission of greater than 70%, i.e., the polymer is a transparent color or visually appears transparent. The polymer may be a resin material such as PET (polyethylene terephthalate), PVC (Polyvinyl chloride), PC (Polycarbonate), or PMMA (Polymethyl Methacrylate), or a photo-curable or thermosetting adhesive such as uv (ultravioletalys) adhesive, oca (optical Clear adhesive).

The body 101 is a polymer layer, wherein the polymer may be uniformly distributed or may not be uniformly distributed. The focusing structure 201 may be formed directly on a surface of the polymer layer on which the body 101 is located, as shown in fig. 1, when there is no interface between the focusing structure 201 and the body 101, i.e. the focusing structure 201 and the body 101 are an integral structure. The focusing structure 201 may also be formed on a polymer layer different from the body 101, i.e. the focusing structure 201 may be formed in a polymer layer coated on a surface of the body. At this point, there is an interface between the focusing structure 201 and the body 101, as shown in FIG. 2. In addition, as shown in fig. 3, a spacing structure 100 may be formed between the focusing structure 201 and the body 101 to support the focusing structure 201 and the body 101.

The polymer from which the focusing structure 201 is made may be the same as or different from the polymer from which the body 101 is made. When the polymer from which the focusing structure 201 is made is different from the polymer from which the body 101 is made, for example, the body 101 is made of a first polymer and the focusing structure 201 is made of a second polymer, adjacent portions (i.e., contact portions) between the two polymers are formed with a fused portion 302 (as shown in fig. 4). Thus, the focusing structure 201 and the body 101 may be regarded as a unitary structure, and no interface exists between the focusing structure 201 and the body 101, or no distinct layer-to-layer boundary exists between the focusing structure 201 and the body 101 in the cross-section of the imaged film or the boundary is present as a regular and orderly boundary. The fused portion may be a region where the two polymers are fused at a predetermined ratio. The preset proportion can be N: M, wherein N and M are the contents of two polymers at the joint of adjacent parts of the focusing structure 201 and the body 101 respectively, and the values of the N and M are 0-100% respectively, but not 0 and 100%. The content of the first polymer in the bulk is 100%; the content of the second polymer in the focusing structure 201 is 100%.

The focusing arrangement 201 may be used for imaging a teletext structure and may comprise one or more focusing elements. The focusing unit may be a micro lens or a fresnel lens. There may be no gaps between the plurality of focusing elements (as shown in fig. 1) in order to reduce the overall volume of the imaging film. Gaps may also exist among the plurality of focusing units (as shown in fig. 5), so that the integrity of the cut focusing units can be ensured when the imaging film is cut, and the subsequent imaging effect of the focusing units can be ensured. In one embodiment, the spacing between adjacent focusing elements may be between 1 micron and 200 microns.

The focusing structure 201 may be formed on a surface of the body 101, and specifically, the focusing unit in the focusing structure 201 may be formed on a surface of the body 101.

The graphic structure 301 may include one or more of the same or different graphic elements, which may be patterns or micro-patterns (i.e., patterns on the micrometer scale), such as patterns of easily distinguishable shapes, such as graphics, text, numbers, grids, landscapes, trademarks, and/or logos. As shown in fig. 6, the graphic structure 301 is a "smiling face" pattern. The different text elements may be of different sizes of (micro) patterns; or the shape of the (micro) pattern may be different; it is also possible that the (micro) patterns are different in their composition, e.g. the first (micro) pattern is the company name and the second (micro) pattern is the company Logo.

The graphic structure 301 may be formed inside the body 101 by evaporation, sputtering, screen printing, transfer printing, embossing, gravure printing, trench filling, and the like. The process of forming the pattern structure in the body will be described by taking the way of filling the trench as an example. The body may be obtained by first forming a receiving structure on one side of a first portion of a polymer for forming the body, then filling the receiving structure with a filling material according to a predetermined pattern to form a pattern structure, then coating a second portion of the polymer on the side of the pattern structure in the first portion of the polymer, and curing the second portion of the polymer. The body is comprised of a first portion and a second portion of the polymer. The formed image-text structure is positioned in the body, and because the periphery of the image-text structure is the same polymer, the surface where the image-text structure is positioned disappears due to the fusion of the polymer, and an interface cannot be formed in the body. In addition, because the image-text structure is completely positioned in the body, the body can protect the image-text structure.

The filler may be a material having a refractive index difference with respect to light from the polymer, and includes a coloring material, a dyeing material, a metal material, a conductive material, and the like, such as a conductive ink. It should be noted that the color of the filler may be different from the color of the polymer, so that when one views the image of the graphic structure, one can clearly distinguish the pattern in the graphic structure.

The preset pattern may refer to a shape of the formed graphic structure. For example, the cross-sectional view of the graphic structure may be a rectangle, a triangle, a trapezoid, or other polygons.

The teletext structure 301 may be adapted to the focus structure 201, which may mean that the teletext structure 301 may be imaged by the focus structure 201, which may be understood as that the teletext elements are imaged by the corresponding focus elements.

The graphic structure 301 may be adapted to the focusing structure 201, and may specifically include that the graphic structure 301 is matched with the position of the focusing structure 201, for example, a micro pattern in the graphic structure 301 is aligned with a focusing unit (e.g., a micro lens) in the focusing structure 201, so as to improve the utilization rate of the polymer material. The adaptation of the image-text structure 301 to the focusing structure 201 may also include that the focusing units in the focusing structure 201 and the image-text units in the image-text structure 301 are arranged in a one-to-one correspondence, which is beneficial to ensuring that each imaging film unit cut by cutting at least one complete focusing unit and image-text unit.

The teletext structure 301 may be located near a focal plane of the focus structure 201, which may be imaged by the focus structure 201, and a magnified image of the teletext structure 301 may be observed on the opposite side of the focus structure 201 from the teletext structure 301. Specifically, each micro pattern in the image-text structure 301 may be located near a corresponding focal plane in the focusing structure 201, each micro pattern may be imaged by a corresponding focusing unit, and a magnified image of the corresponding micro pattern may be observed on the other side of each focusing unit. The focal plane may represent a plane that passes through the focal point of the focusing unit and is perpendicular to the main optical axis of the focusing unit.

The distance between the top of the focusing structure 201 and the top of the teletext structure 301 may be in the range of 2-150 microns. When the distance between the focusing structure and the image-text structure is small, it can be understood that the image-text structure is embedded in the microlens structure. The smaller the distance between the focusing structure and the image-text structure is, the thinner the thickness of the imaging film is, so that the cost can be saved, and the imaging film can be cut off more easily during hot stamping.

As can be seen from the above description, in the embodiment of the present application, the image-text structure is disposed inside the main body, so as to achieve the purpose of reducing the thickness of the imaging film. In addition, because the body can completely cover the image-text structure, an additional protective layer is not required to be arranged. In addition, the imaged film in the embodiments of the present application has no mechanically good substrate, which allows the imaged film to be easily cut when hot stamped.

The imaging film in the embodiment of the application has thin thickness which can reach less than tens of micrometers, even can reach several micrometers, and is easy to cut, so that the imaging film is easy to transfer, and the weight and the cost can be reduced.

In another embodiment, the imaging film further comprises a reflective structure 401 disposed on an outer surface of the focusing structure 201 remote from the teletext structure 301, as shown in fig. 7. The reflecting structure 401 is used to reflect light rays of the teletext structure 301 reflected back through the focusing structure 201 again, which allows a user to observe an image of the teletext structure 301 on its side.

The reflective structure 401 may be a transparent material, an opaque material, or a semi-transparent material. The reflective structure 401 may have a thickness of 0.02 to 5 microns. The reflective structure 401 may be formed by magnetron sputtering, evaporation, inkjet printing, or the like.

The reflection structure is arranged on the surface of the focusing structure, so that the image-text structure side of the imaging film can be attached to an actual application product in actual application, the image of the image-text structure is observed from the image-text structure side, the problem that the user experience effect is influenced due to the fact that the concave and convex of the focusing structure side is uneven when the image of the image-text structure is observed from the focusing structure side can be avoided, and the user experience feeling is improved.

In another embodiment, a protective structure may be disposed on an outer surface of the focusing structure to isolate the focusing structure from the outside, so as to avoid the focusing structure from being affected by the external environment, and thus the imaging effect of the imaging film is not affected.

In another embodiment, the focusing units in the focusing structure are arranged asymmetrically, and the teletext units in the teletext structure may comprise a lattice having an on and/or off state; the graphic unit can also be a pattern formed by evaporation, sputtering, screen printing, transfer printing, embossing, gravure printing, groove filling and the like. Different patterns or micrographs can be formed by switching on or off different dot matrices. The (micro) graphic may be a mono-channel pattern or a multi-channel pattern. The lattice can be a pixel point, and can also be a single or a plurality of luminous sources. The pixel points may be obtained from an LCM display, an OLED (organic Light-Emitting Diode) display, or an LED (Light-Emitting Diode) display, or may be obtained from other display devices with pixels. The one or more light emitting sources may be LEDs. The LED display panel herein is a backlight source using LEDs. The LEDs may be individual diodes, such as some light box display devices. Therefore, whether the pixel points or the single or a plurality of luminous sources, the graph and text unit formed by the pixel points or the luminous sources is formed by discrete points. Combinations of different discrete points may form different images and texts. The plurality of text units may have a common lattice, for example, a first text unit includes a first lattice in an on state and a second lattice in an off state, a second text unit includes a second lattice in an on state, and the first text unit and the second text unit have a common second lattice.

The position coordinates of the image-text unit are associated with the position coordinates of the focusing unit, so that all the dot matrixes in the connected state form at least one floating image through the focusing unit, namely, the image-text unit forms at least one floating image through the focusing unit. The association may be that the position coordinates of the graphic unit are obtained from the position coordinates of the focusing unit through a preset transformation, which may include a coordinate scaling transformation or a coordinate rotation transformation, or a combination thereof, but is not limited to the above transformation.

For example, see FIGS. 8-9. Fig. 8 shows the focusing units 22 arranged randomly, and fig. 9 shows the square lattice transformed according to the following predetermined function:

ξ_i＝-x_oi-arg sinh(y_oi)，

η_i＝y_oi-arg sinh(x_oi)；

then, the non-periodic arrangement of the focusing elements is obtained by taking the dot matrix coordinates as the center of the focusing element 24. Wherein ξ_iAnd η_iThe position coordinates after the transformation of the focusing unit; x is the number of_oiAnd y_oiThe position coordinates before the transformation for the focusing unit. The ratio of the area of the focusing structure on the surface of the body to the total area of the surface of the body is called the duty cycle. The higher the duty cycle, the higher the contrast of the resulting magnified image. Preferably, the total area occupied by all the focusing units in the focusing structure is more than 60% of the total area of the surface of the body on which the focusing units are arranged.

Please refer to fig. 10 and fig. 11. Fig. 10 is an arrangement of the graphic elements obtained by the magnification transformation of the randomly arranged dot matrix coordinates in fig. 8. The amplified transform is:

α_i＝0.99x_oi

β_i＝0.99y_oi

wherein alpha is_iAnd beta_iThe position coordinates of the image-text unit after transformation; x is the number of_oiAnd y_oiThe position coordinates of the focusing unit can be regarded as the position coordinates before the transformation of the graphic unit. The image-text units are arranged in the image-text structure without symmetry axes and are randomly arranged. FIG. 11 is a graph of FIG. 9 according to a predetermined function

ξ_i＝-x_oi-arg sinh(y_oi)

η_i＝y_oi-arg sinh(x_oi)

The dot matrix coordinates of the arranged focusing units are subjected to counterclockwise rotation transformation (for example, rotation is 2 °, but not limited to this value), and the obtained image-text unit arrangement is obtained. Wherein x is_oiAnd y_oiIs the position coordinates of the focusing unit. The image-text units have no symmetrical axis in the image-text structure and are distributed in a non-periodic manner.

In the above zooming and rotating transformation, there may be one and only one transformed motionless point pair between the surface of the body where the focusing structure is located and the text structure (i.e. one point is selected as the motionless point on the surface of the body where the focusing structure is located, and a point corresponding to the motionless point is selected in the text structure, and these two points constitute the motionless point pair), for example, point 21-point 31 (as shown in fig. 8 and 10), point 23-point 33 (as shown in fig. 9 and 11). In practical applications, the coordinate transformation used may include, but is not limited to, coordinate scaling transformations and coordinate rotation transformations, or combinations thereof. Of course, the transformation function (i.e. the predetermined transformation) of the position coordinates of the teletext element may also be another function with one and only one stationary point. Because the focusing units are asymmetrically arranged on the surface of the body and have only one fixed point, and in addition, the transformation function of the position coordinates of the image-text unit is also the function of only one fixed point, the unique position coordinates formed after the image-text unit is transformed can be determined, and the imaging film only can present a unique image. Although the image will have a certain deflection and size change during the rotation of the film, the definition of the image is still ensured since no overlapping or other images will be generated.

The imaging film provided by all the embodiments of the present application realizes the principle of suspended enlarged image, as shown in fig. 12. The curvature radius of the focusing unit is R, the focal length is f, and the height of the suspended image of the image-text unit is d_i. Then according to the geometric relationship in figure 12:

the height of the floating image can be obtained:

wherein beta represents the angle between the light passing through the center of the focusing unit and the vertical direction, delta represents the vertical distance between the boundary of the focusing unit and the center of the focusing unit and x represents_MLACoordinate value, x, representing a focusing element_MPACoordinate values representing the teletext cells. When in useThen, the magnified image of the floating image-text unit is obtained. In the invention, the image-text image with dynamic three-dimensional suspension effect can be obtained by carrying out scaling transformation or rotation transformation on the position coordinates of the focusing unit.

FIG. 13 is a schematic diagram illustrating the 3D imaging visual effect of an imaged film in an embodiment of the present application. The outer surface of the focusing structure in the imaging film is provided with a reflecting structure (not shown in the figure). As can be seen in fig. 13, the imaging film can enlarge the graphic unit 44 originally hidden in the graphic structure to be directly distinguished by naked eyes. The viewer views from the side opposite the focusing structure and will see only one magnified image 45 suspended between the viewer and the body. No further magnified image of the second teletext element enters the viewing area, either when the imaging film is rotated along the horizontal axis 41 or when it is rotated along the vertical axis 42.

It should be noted that the "one and only one" floating image is not a conventional icon or text, such as a multi-channel pattern. The image must have a primary image element, which is understood to be the image formed by the primary image element through the action of the optical device. The original image unit is a complete image or an image capable of expressing a complete meaning, for example, a company Logo composed of an english letter or a plurality of english letters, so "there is and only one" is defined according to the original image unit, and the formed image is only one original image unit, that is, "there is and only one" cannot judge the number of images according to the connected domain. In addition, the fact that the floating image is only one and the same does not mean that the imaging film can only form a single floating image, but means that for the same graphic element (a graphic element means one or more same graphic elements), the dot matrix in the on state in all the graphic elements can form a single floating image corresponding to the graphic element through the focusing unit. For different types of graphic and text units (different types of graphic and text units can mean that the graphic and text formed by the dot matrix in the on state in each type of graphic and text unit are different), the only one floating image formed by each type of graphic and text unit is different.

The embodiment of the present application further provides a method for preparing an imaging film, as shown in fig. 14, the method includes the following steps:

S1A: a first portion of a polymer having a focusing structure and a containment structure formed on opposite sides thereof, respectively, is obtained.

The polymer may be a single polymer, such as a curable resin or a UV glue, or a mixed polymer of a plurality of polymers that do not react with each other. The polymer can be in a colloidal state at normal temperature and pressure.

The step may specifically include the following sub-steps:

s11: a first portion of the polymer is obtained.

S12: a focusing structure and a receiving structure are formed on opposite sides of the first portion, respectively.

In an embodiment, after obtaining a first portion of the polymer for forming the body, a first side of the first portion may be imprinted using a first mold having a predetermined focusing structure pattern to form a focusing preliminary structure, and a second side of the first portion may be imprinted using a second mold having a predetermined receiving structure pattern to form a receiving preliminary structure. The resulting focusing and containment preliminary structures may then be cured to form focusing and containment structures.

In another embodiment, after obtaining a first portion of the polymer (e.g., a first polymer) for forming the body, obtaining a polymer (e.g., a second polymer) for forming the focusing structure, a first side of the second polymer may be imprinted using a first mold having a predetermined focusing structure pattern, and simultaneously or within a first predetermined time interval, a second side of the first portion of the first polymer may be imprinted using a second mold having a predetermined receiving structure pattern, adjacent portions between the first polymer and the second polymer contacting during imprinting to form a fusion, and forming the focusing preliminary structure and the receiving preliminary structure. The resulting focusing and containment preliminary structures may then be cured using a radiation or heat source to form focusing and containment structures. The first side and the second side are opposite.

In another embodiment, after obtaining a first portion of the polymer for forming the body, a second side of the first portion may be imprinted using a second mold having a predetermined pattern of containment features to form a containment preliminary structure. And then, curing the preliminary accommodating structure to form the accommodating structure. Coating a polymer on one side of the first part opposite to the accommodating structure, stamping one side of the coated polymer far away from the accommodating structure by using a first mould with a preset focusing structure pattern to form a focusing primary structure, and finally curing the focusing primary structure to form the focusing structure. The polymer to be coated may be the same as or different from the polymer to be obtained.

S2A: filling a filler in the accommodating structure to form a graph-text structure, wherein the filler and the polymer have different refractive indexes for light.

After forming the containment structure on the first portion of the polymer, a filler may be filled into the containment structure in a predetermined pattern and then dried to form the graphic structure.

S3A: fusing the obtained second portion of the polymer with the side of the graphic structure in the first portion of the polymer to form a body.

After the image-text structure is formed, a second part of the polymer obtained in advance or in real time can be coated on the side of the image-text structure in the first part of the polymer, and then the second part of the polymer is solidified, and the solidified first part and the second part of the polymer form a body to obtain the imaging film.

The process of curing the second part of the polymer applied to the side of the graphic structure in the first part may be understood as a process of fusing the second part of the polymer to an adjacent part between the first part of the polymer.

It should be noted that the execution sequence between the step of obtaining the second part of the polymer and the above steps S1-S2 is not limited.

Through the steps, the image-text structure is formed inside the body in the preparation method of the imaging film provided by the embodiment of the application, so that the thickness of the imaging film can be reduced. In addition, the method has simple process, saves materials, reduces the cost and is suitable for industrial production.

The embodiment of the present application further provides a method for preparing an imaging film, as shown in fig. 15, the method includes the following steps:

S1B: a first portion of a polymer formed with a containment structure is obtained.

After obtaining a first portion of the polymer for forming the body, a containment structure may be formed on one side of the first portion. The specific process of this step can refer to step S1A, which is not described herein in detail.

S2B: filling the containing structure with a filler to form a pattern structure, wherein the filler and the polymer have different refractive indexes for light.

The specific implementation of this step can refer to S2A, which is not described herein in detail.

S3B: and fusing the obtained first side of the second part of the polymer with the side of the image-text structure in the first part of the polymer to form a body, and forming a focusing structure on a second side, opposite to the first side, in the second part of the polymer in the fusing process.

After the graphic structure is formed, a second part of the polymer, which is obtained in advance or in real time, can be coated on the side of the graphic structure in the first part of the polymer, and then the second part of the polymer is solidified to form the body. During the curing process, the contact area between the second part of the polymer and the first part of the polymer is fused, i.e. the first side of the second part is fused with the side of the first part where the graphic structure is located. The process of curing may thus be understood as a process in which the second part of the polymer is fused with the first part of the polymer. Furthermore, during curing, a focusing structure may be formed at the second side of the second portion of the polymer. In particular, the method comprises the following steps of,

after coating the second portion of the polymer on the side of the image-text structure, the coated second side of the polymer may be imprinted using a first mold having a predetermined focusing structure pattern to form a focusing preliminary structure, and then the second portion of the polymer is cured, and the focusing preliminary structure is cured to form a focusing structure. The first and second portions of the polymer after curing constitute a body.

Through the steps, the image-text structure is formed inside the body in the preparation method of the imaging film provided by the embodiment of the application, so that the thickness of the imaging film can be reduced. In addition, the method has simple process, saves materials, reduces the cost and is suitable for industrial production.

The embodiment of the present application further provides a method for preparing an imaging film, as shown in fig. 16, the method includes the following steps:

S1C: a first portion of a polymer formed with a containment structure is obtained.

S2C: filling a filler into the containing structure to form a pattern structure, wherein the filler and the polymer have different refractive indexes for light;

the above two steps are the same as S1B-S2B and are not described in detail herein.

S3C: obtaining a second portion of the polymer formed with the focused preliminary structure.

After the second portion of the polymer is immediately or pre-acquired, one side (e.g., the second side) of the second portion may be imprinted using a first mold having a predetermined pattern of focusing structures to form a focusing preliminary structure.

S4C: and fusing the side of the second part of the polymer, which is opposite to the focusing preliminary structure, with the side of the first part of the polymer, on which the image-text structure is positioned, so as to form a body, wherein in the fusing process, the focusing preliminary structure is formed into a focusing structure.

After forming the focused preliminary structure on the second portion of the polymer, a side (e.g., a first side) of the second portion of the polymer opposite the focused preliminary structure may be fused to a side of the first portion of the polymer on which the graphic structure is located to form a body, and during the fusing, the focused preliminary structure is cured into a focused structure. In particular, the method comprises the following steps of,

a second portion of the polymer may be coated on the side of the graphic structure in the first portion of the polymer, wherein the first side of the second portion is in contact with the side of the graphic structure in the first portion; the second portion of the polymer is then cured and the focused preliminary structure is formed into a focused structure. The second part and the first part of the cured polymer constitute the body. During the curing process, the first side of the second part merges with the side of the first part on which the image-text structure is located.

Through the steps, the image-text structure is formed inside the body in the preparation method of the imaging film provided by the embodiment of the application, so that the thickness of the imaging film can be reduced. In addition, the method has simple process, saves materials, reduces the cost and is suitable for industrial production.

The embodiment of the present application further provides a method for preparing an imaging film, as shown in fig. 17, the method includes the following steps:

S1D: the obtained substrate (e.g., PET, PC, PMMA, glass, etc.) is coated with a first portion of a polymer (e.g., a gel of UV, OCA, etc.) and the first portion of the polymer is cured.

S2D: printing a pattern structure on the surface of the first part of the solidified polymer, wherein the pattern structure is a convex structure.

S3D: coating a second part of the polymer on the surface of the graphic structure, and forming a focusing preliminary structure on the second part of the polymer far away from the graphic structure by using a mold.

S4D: and solidifying the focusing preliminary structure to form a focusing structure, and separating the mould.

S5D: peeling the substrate from the first portion of the polymer.

It should be noted that the sequence between S5D and S2D-S4D is not limited.

By the above steps, the first part and the second part of the polymer after curing constitute a body. The picture and text structure is formed inside the body, and the focusing structure is formed on one surface of the body. The focusing structure and the body with the image-text structure formed inside form the imaging film.

Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail. In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Moreover, the technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.