CN211180272U

CN211180272U - Optical imaging film

Info

Publication number: CN211180272U
Application number: CN201922416825.2U
Authority: CN
Inventors: 郑伟伟; 申溯
Original assignee: Shine Optoelectronics Kunshan Co Ltd
Current assignee: Shine Optoelectronics Kunshan Co Ltd
Priority date: 2019-12-29
Filing date: 2019-12-29
Publication date: 2020-08-04
Anticipated expiration: 2029-12-29

Abstract

The utility model provides an optical imaging film, this optical imaging film includes, picture and text layer, it disposes at least two sets of sub-pictures and texts, every group the sub-picture and text sets up to the partial pattern of presetting the picture and text, each the sub-picture and text corresponds respectively the different regions of presetting the picture and text; a focusing layer which is arranged in a laminating way with the image-text layer and is provided with a plurality of focusing structures; the focusing structure is respectively matched with each group of sub-images of the image-text layer and has different corresponding relations, so that the optical imaging film presents different amplified images of preset images and texts in different visual angle ranges, and the visual angles of the amplified images have non-overlapping positions or the visual angles of the amplified images have no overlapping positions. The preset pattern displayed by the optical imaging film changes with the visual angle, and is novel visual sense when being hidden and appearing, so that the dense effect of periodic arrangement is avoided, and a plurality of 'unique suspensions' can be realized.

Description

Optical imaging film

Technical Field

The utility model relates to an optical film technical field specifically relates to an optical imaging membrane.

Background

The imaging and display technology is receiving more and more attention, the imaging technology realized based on the micro lens (micro lens array) has great potential and development prospect by virtue of the advantages of complete parallax, continuous viewpoint, no need of any observation glasses and special illumination and the like, and gradually develops into the automatic display technology with the most potential and prospect, and the imaging usually adopts the moire imaging technology to form an optical imaging film. The optical imaging film generally includes a graphic layer and a focusing layer, wherein the graphic layer includes a plurality of micro-graphics, and the focusing layer generally includes a plurality of micro-lenses, and the micro-lenses interact with the graphic layer to form an image with a magnifying effect. The micro lens has the characteristic dimension of micron or nanometer scale, has a functional structure arranged according to a specific mode, has the characteristics of light weight, high design freedom, flexible structure and the like, and has remarkable advantages in the field of optical imaging. The display modes are roughly divided into two types, one type is a periodic image, and the whole period is the same or similar; the other is a single image, primarily used to display commercial logos or for special symbol identification. The unity of the display effect can cause aesthetic fatigue of people, and the logo which is only suspended has strong visual effect but relatively large manufacturing difficulty at present. Moire images of "periodic" arrays appear to be over emphasized and can cause "dense phobia" in humans.

Thus, there is a need in the art for new optical imaging films.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: the novel optical imaging film is provided, the structures of the micro-lens array and the sub-image array are optimized, the sub-images and texts are arranged periodically or randomly, a novel visual sense that the imaging is hidden and appearing when the imaging is changed along with the visual angle is displayed, the dense effect of periodic arrangement is avoided, a plurality of 'unique suspensions' can be realized, and the manufacturing difficulty of the film is reduced.

In order to achieve the purpose, the technical scheme adopted by the application is as follows,

an optical imaging film, comprising: the image-text layer is provided with at least two groups of sub-images-texts, each group of sub-images-texts is set as a part of a preset image-text pattern, and each sub-image-text corresponds to different areas of the preset image-text; a focusing layer which is arranged in a laminating way with the image-text layer and is provided with a plurality of focusing structures; the focusing structure is respectively matched with each group of sub-images of the image-text layer and has different corresponding relations, so that the optical imaging film presents different amplified images of preset images and texts in different visual angle ranges, and the visual angles of the amplified images have non-overlapping positions or the visual angles of the amplified images have no overlapping positions. The visual angles corresponding to the plurality of groups of sub-texts are different, so that when the visual angle is changed, the preset images of the plurality of groups of sub-texts are visually presented, and sometimes the preset images are hidden, and the effect similar to starry sky flickering is achieved.

Preferably, when any one of the focusing structures corresponds to one of the sub-images of each group of sub-images of the image-text layer, the corresponding relations are mutually offset.

Preferably, the focusing layer includes a plurality of focusing units, each focusing unit includes a plurality of focusing structures, and each focusing unit is disposed corresponding to one group of sub-images.

Preferably, the graphic parts presented by each group of adjacent sub-graphics are the same.

Preferably, in the image-text layer, each sub-image-text of each group is set as a partial pattern of a preset image-text; and partial patterns of at least two preset images and texts are different.

Preferably, the plurality of sets of sub-images include one or more of a printing pattern, a relief pattern, and a filling pattern.

Preferably, the plurality of sub-images are disposed on the same layer of the image-text layer, or at least 2 or more sub-images are disposed on the same layer of the image-text layer.

Preferably, the plurality of sub-images are arranged periodically or randomly.

Preferably, the focusing structure is matched and corresponding to each group of the sub-images; and the distance between the sub-image-text and the focal plane of the focusing structure is 0.7-1.3 times of the focal length.

Preferably, the focusing structures are arranged periodically or randomly.

Preferably, the optical imaging film further comprises a substrate, along the thickness direction of the substrate, a plurality of sets of the sub-patterns are formed on one side of the substrate, and the focusing structure is formed on the other side of the substrate.

Advantageous effects

Compared with the scheme in the prior art, the optical imaging film provided by the embodiment of the application has the advantages that the sub-images are arranged periodically or randomly, the displayed patterns are changed along with the visual angle, the imaging is hidden and appearing, and the novel visual sense is hidden and appearing, so that the dense effect of periodic arrangement is avoided, and a plurality of 'unique suspensions' can be realized.

Drawings

In order to more clearly illustrate the embodiments of the present specification 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 described below, it is obvious that the drawings in the following description are only some embodiments described in the specification, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise:

FIG. 1 is a schematic view of an observation optical imaging film according to an embodiment of the present application;

FIG. 2 is a schematic representation of the imaging of the optical imaging film of FIG. 1;

FIG. 3a and FIG. 3b are schematic front views of embodiments of the present application;

fig. 4a and 4b are schematic views illustrating a first viewing angle according to an embodiment of the present disclosure;

fig. 5a and 5b are schematic diagrams illustrating a second viewing angle according to an embodiment of the present application.

Detailed Description

In order to make those skilled in the art better understand the technical solution proposed by the present invention, the technical solution in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only a part of the embodiments in the present specification, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from one or more embodiments of the present disclosure without any inventive step, shall fall within the scope of protection of the present disclosure.

The application provides an optical imaging film, which is characterized in that sub-images of an image-text layer are arranged for the second time, at least two groups of sub-images are configured, each group of sub-images is set as a part of image patterns of preset images-texts, and each sub-image corresponds to different areas of the preset images-texts respectively; a focusing layer which is arranged in a laminating way with the image-text layer and is provided with a plurality of focusing structures; the focusing structure is respectively matched with each group of sub-images of the image-text layer and has different corresponding relations (each group of images corresponds to different observation visual angles), so that the optical imaging film presents different amplified images of preset images and texts in different visual angle ranges, and the visual angles of the amplified images have non-overlapping positions or the visual angles of the amplified images have no overlapping positions. When the viewing angle (change) is shifted in this way, some images appear and some disappear, and thus the effect of flickering is visually exhibited. The angle (visual angle) of sub-images at different positions relative to the observation position of an observer is different from the observation position of the optical imaging film, so that a plurality of groups of pre-set images of the sub-images are visually presented, and the pre-set images are sometimes 'visible' or 'invisible', and are similar to the effect of starry sky flickering.

The optical imaging film proposed in the present application is described in detail below with reference to the accompanying drawings.

As shown in fig. 1, which is a schematic view of an optical imaging film viewed by human eyes, different positions of the optical imaging film are sometimes "apparent" and sometimes "hidden" relative to an image of a sub-text preset at different viewing angles (see fig. 2).

The application proposes an optical imaging film comprising: a graphics layer configured with a plurality of sub-graphics; the focusing layer is arranged on the upper side of the image-text layer and is provided with a plurality of focusing structures which are arranged according to a certain rule; the focusing structure is respectively matched with each group of sub-images of the image-text layer and has different corresponding relations, so that the optical imaging film presents different amplified images of the preset images and texts in different visual angle ranges, and the visual angles of the amplified images have non-overlapping positions or the visual angles of the amplified images have no overlapping positions. In this way, different images (moving) or the same image are seen in different viewing angles. Preferably, the device further comprises a substrate located between the image-text layer and the focusing layer. The substrate can be a PET layer, a PC layer, a PI layer, a PMMA layer or a CPI layer, and the image-text layer and the focusing layer are respectively positioned on two sides of the substrate along the thickness direction. The focusing structure comprises a micro lens (micro lens array) or a Fresnel lens (Fresnel lens array), and the plurality of groups of sub-pattern arrays are respectively matched with the corresponding focusing structure arrays one by one. The plurality of sub-teletext arrays may have the same content, such that in front view it is in the middle of the sub-teletext array, and in the first view it is moved "to one side of the sub-teletext array, and in the second view it is not visible.

Next, imaging at different viewing angles will be described with reference to the drawings, taking a group of sub-images and an image "a" formed by the focusing structure as an example, as shown in fig. 3a, when the focusing structure 11 is viewed from the front at a viewing angle, the image layer 13 is configured with a plurality of groups of sub-images 131; a focusing layer arranged on the upper side of the image-text layer 13 and provided with a plurality of focusing structures 11 arranged according to a certain rule; the focusing structure of the focusing layer is matched with each group of sub-images 131 of the image-text layer, so that the matched sub-images have amplified images presenting preset images and texts in different visual angle ranges seen from the focusing structure. The image is visually seen in the middle of the sub-text array (see fig. 3 b). When the viewing angle is shifted to one side (e.g., the viewing angle is a first viewing angle (see fig. 4a), the image visually seen is on one side of the sub-image array (see fig. 4b), and when the viewing angle is shifted (and the viewing angle is continuously increased), e.g., the viewing angle is a second viewing angle (see fig. 5a), the image visually not seen (see fig. 5 b). in one embodiment, when a plurality of groups of sub-images are provided to form an enlarged image of a plurality of preset images, each group of sub-images has a different viewing angle, so that some images appear to disappear and have a flickering effect when the viewing angle is shifted, preferably, the plurality of groups of sub-images are disposed on the same layer of the image-image layer, and may be disposed layer by layer, or 2 or more than 2 groups of sub-images are disposed on the same layer of the image-image layer, the plurality of groups of sub-images are periodically or randomly disposed, each group of sub-images includes the sub-, and each group of sub-graph arrays are respectively matched with the focusing structure.

Different sets of sub-teletext arrays are arranged by different offsets of the sub-teletext arrays relative to the focus structure. Compared with the prior art, the optical imaging film in the application moves within 0-180 degrees of observation visual angle, and different (moving) images or the same image can be seen visually.

In one embodiment, the distance between each group of sub-images and the focal plane of the focusing structure is 0.7 to 1.3 times of the focal length.

In one embodiment, the focusing structure is in matching correspondence (or one-to-one matching correspondence) with each group of sub-images (sub-image array).

In one embodiment, the correspondence is offset when any of the focusing structures corresponds to one of said sub-images of each group of sub-images of the image-text layer. I.e. one set of said focusing structures corresponds to at least two sets of sub-images.

In one embodiment, the focusing structures are arranged periodically or randomly.

In one embodiment, the optical imaging film further comprises a reflective layer disposed outside the focusing layer for reflecting light entering the optical imaging film, thereby facilitating light to exit from the focusing layer and improving imaging effect.

In one embodiment, the optical imaging film further comprises a protective layer disposed outside the image-text layer and/or outside the focusing layer to improve the lifetime of the optical imaging film.

In one embodiment, the optical imaging film further includes an ink layer disposed outside the image-text layer.

The optical imaging film in the above embodiments can be used as an anti-counterfeiting film, a decorative film, and the like. The optical imaging film can also be used in other fields, for example, the optical imaging film can be used for shells of household appliances, various outer packages and various anti-counterfeiting occasions, or can be used for realizing anti-counterfeiting function and decoration.

In the design of the focusing layer, it includes a focusing structure, and the focusing structure is preferably formed by stamping and curing to form a protrusion or a recess with a hemispherical shape or smaller than a hemispherical shape, and the shape of each focusing structure is the same, or the focusing structure is formed by other methods such as etching, etc., so as to implement the focusing function, which is not limited herein. Preferably, the focusing structures have the same shape and size, are all hemispherical protrusions, and the diameter of the hemispherical protrusions can be between 20 μm and 1000 μm.

The design of the image-text layer can comprise a plurality of groups of sub-images-texts, and during molding, the sub-images-texts are formed by printing or corresponding sub-images are extruded by a mold, and the image-text layer can also have colors. The plurality of groups of sub-images are matched with the focusing structure, and the sub-images are positioned on or near the focal plane of the corresponding focusing structure, so that the focusing structure has a good imaging effect on the sub-images. Wherein, for a focusing structure (such as a microlens), the focal plane is defined as: the plane through the focal point and perpendicular to the main optical axis of the system is the focal plane. Preferably, the distance between the sub-image and the focal plane of the corresponding focusing structure is 0.7 to 1.3 times of the focal length. The total thickness of the optical imaging film is between one half of the curvature radius of the focusing structure and three times of the curvature radius of the focusing structure; in order to make the application field of the optical imaging film wider, the total thickness of the optical imaging film is less than 5000 μm, for example, the thickness of the optical imaging film is (20 μm, 200 μm) for high-end fields and fields requiring ultra-thin design, or the thickness of the optical imaging film is (300 μm, 500 μm) for general small-volume products and fields requiring no high thickness, or the thickness of the optical imaging film is (600 μm, 1000 μm), or even thicker, such as 1200 μm, 1300 μm, 1500 μm, 2000 μm, 2500 μm, 3500 μm, or 4500 μm.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. An optical imaging film, comprising:

the image-text layer is provided with at least two groups of sub-images-texts, each group of sub-images-texts is set as a part of a preset image-text pattern, and each sub-image-text corresponds to different areas of the preset image-text;

a focusing layer which is arranged in a laminating way with the image-text layer and is provided with a plurality of focusing structures;

the focusing structure is respectively matched with each group of sub-images of the image-text layer and has different corresponding relations, so that the optical imaging film presents different amplified images of preset images and texts in different visual angle ranges, and the visual angles of the amplified images have non-overlapping positions or the visual angles of the amplified images have no overlapping positions.

2. The optical imaging film as claimed in claim 1, wherein the correspondence between any one of the focusing structures corresponding to one of the sub-images of each sub-image of the image layer is offset from the correspondence between the focusing structures corresponding to the other sub-images of each sub-image of the image layer.

3. The optical imaging film of claim 1,

the focusing layer comprises a plurality of focusing units, each focusing unit comprises a plurality of focusing structures, and each focusing unit corresponds to one group of sub-images.

4. The optical imaging film of claim 1, wherein the graphic portions presented by each group of adjacent sub-graphics are the same.

5. The optical imaging film as claimed in claim 1, wherein each of the sub-images of each set in the image-text layer is provided as a partial pattern of a predetermined image-text; and partial patterns of at least two preset images and texts are different.

6. The optical imaging film of claim 1, wherein the plurality of sets of sub-graphics comprise one or more of a printed pattern, a relief pattern, and a fill pattern.

7. The optical imaging film as claimed in claim 6, wherein a plurality of the sub-patterns are disposed on the same layer of the image-text layer, or at least 2 or more sub-patterns are disposed on the same layer of the image-text layer.

8. The optical imaging film of claim 1, wherein the focusing structures are in matching correspondence with each set of the sub-images; and the distance between the sub-image-text and the focal plane of the focusing structure is 0.7-1.3 times of the focal length.

9. The optical imaging film of claim 1, wherein the focusing structures are arranged periodically or randomly, and the plurality of sub-images in each group are arranged periodically or randomly.

10. The optical imaging film as claimed in claim 1, further comprising a substrate, wherein a plurality of sets of the sub-patterns are formed on one side of the substrate and the focusing structure is formed on the other side of the substrate along a thickness direction of the substrate.