AR brightness enhancement film

Abstract

The utility model discloses an AR brightness enhancement film, and relates to the technical field of brightness enhancement films, the AR brightness enhancement film comprises a base film layer, a prism structure layer and an AR film layer, the prism structure layer and the AR film layer are arranged on two sides of the base film layer, and the AR film layer is provided with a particle structure; the particle structure comprises large particles and small particles, and the number ratio of the large particles to the small particles is (1: 10)-(1: 50). According to the AR brightness enhancement film, the AR film layer is arranged on the base film layer, and the particle structure is arranged on the AR film layer, so that the AR brightness enhancement film provided by the utility model has better brightness enhancement and light transmission capability than a common brightness enhancement film with single lower light enhancement, and the problem that the brightness enhancement capability of the existing brightness enhancement film is bottleneck due to material limitation is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of brightness enhancement films, and in particular mainly relates to an AR brightness enhancement film. Background Art

[0002] Brightness enhancement film is also called prism film or focusing film. It uses the special prism structure on the surface to concentrate light from all directions to the central viewing angle of the film through optical effects such as refraction, reflection, total reflection, and light accumulation, thereby improving the brightness of the display panel and controlling the viewing angle. Therefore, brightness enhancement film is widely used in TFT-LCD backlight modules to improve the luminous efficiency of the entire backlight system.

[0003] With the rapid development of science and technology, the functions of electronic products are becoming more and more powerful, and the requirements for the brightness of LCD display devices are also getting higher and higher. The prism structure on the surface of the brightness enhancement film is formed by the resin glue coated on the base film and cured by high-energy ultraviolet light. Therefore, the brightness enhancement ability of the brightness enhancement film is determined by factors such as the refractive index of the resin glue, the shape of the prism structure, and the transmittance of the base film. The improvement of the existing brightness enhancement film in terms of the above factors has almost reached the limit. It is very difficult to improve the brightness enhancement ability of the brightness enhancement film by improving the refractive index of the resin glue, the shape of the prism structure, and the transmittance of the base film.

[0004] In view of this, it is necessary to improve the structure of the existing brightness enhancement film. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides an AR brightness enhancement film to improve the brightness enhancement capability of the brightness enhancement film.

[0006] The utility model discloses an AR brightness enhancement film, which comprises a base film layer, a prism structure layer and an AR film layer. The prism structure layer and the AR film layer are arranged on both sides of the base film layer, and a particle structure is arranged on the AR film layer.

[0007] Preferably, the prism structure layer comprises a plurality of prisms extending and distributed along a plane.

[0008] Preferably, the prism is a triangular prism, and the edges at the top of the triangular prism are in a corrugated undulating structure.

[0009] Preferably, the particle structure comprises large particles and small particles, and the number ratio of the large particles to the small particles is between 1:10 and 1:50.

[0010] Preferably, the particle size of the large particles is 6 μm, and the particle size of the small particles is 1 μm.

[0011] Preferably, the material of the AR film layer includes one of zirconium dioxide, titanium dioxide, magnesium fluoride, silicon dioxide, aluminum oxide or ZnSe.

[0012] Preferably, the thickness of the AR film layer (3) is in the range of 0.1 to 5 μm.

[0013] Preferably, the thickness of the base film layer ranges from 38 to 250 μm.

[0014] Preferably, the base film layer has a thickness of 50 μm.

[0015] Preferably, the height of the prisms is between 10-100 μm.

[0016] The beneficial effects of the utility model are:

[0017] Since the AR film layer has a good effect of reducing reflection and improving the refractive index of the film, by arranging the AR film layer on the base film layer and arranging the particle structure on the AR film layer, the AR brightening film of the utility model has better brightening and light transmittance capabilities than ordinary single-bottom brightening films, solving the bottleneck problem of the brightening capacity of the existing brightening films caused by material limitations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a front view of the utility model.

[0021] Explanation of the accompanying drawings: 1. base film layer; 2. prismatic structure layer; 21. prism; 3. AR film layer; 31. particle structure. DETAILED DESCRIPTION

[0022] The following will disclose multiple embodiments of the present invention with diagrams. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the diagram, some conventional structures and parts will be depicted in a simple schematic manner in the diagram.

[0023] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish between parts or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0026] Reference Figure 1 and Figure 2 , is an AR brightness enhancement film disclosed in the utility model, comprising a base film layer 1, a prism structure layer 2 and an AR film layer 3, wherein the prism structure layer 2 and the AR film layer 3 are respectively arranged on both sides of the base film layer 1, wherein the base film layer 1 is used as a carrier for the prism structure layer 2 and the AR film layer 3, the material of the base film layer 1 is PET, i.e. polyethylene terephthalate, the thickness range of the base film layer 1 is between 38 and 250 μm, the typical thickness of the base film layer 1 includes 38 μm, 50 μm, 75 μm, 100 μm, 125 μm, 188 μm, 150 μm, 188 μm, 250 μm, the preferred thickness is 50 μm, and the transmittance of the base film layer 1 is 92%.

[0027] Reference Figure 1 and Figure 2 The prism structure layer 2 includes a plurality of continuously and densely arranged prisms 21 extending and distributed along a plane of the base film layer 1. The height of the prisms 21 of the prism structure layer 2 ranges from 10 to 100 μm, and it can improve the brightness of the surface of the brightness enhancement film by refraction, reflection, total reflection, light accumulation, etc.; specifically, the prism structure layer 2 is made of liquid modified zirconium dioxide acrylic resin by high-energy ultraviolet light, i.e., UV curing, wherein the modified zirconium dioxide acrylic resin includes acrylate, zirconium oxide and an initiator, which are mixed; the prism 21 preferably adopts a triangular prism 21, and the edge of the top of the triangular prism 21 is a corrugated undulating structure along its length direction.

[0028] Reference Figure 1 and Figure 2 The AR film layer 3 is made of AR material, which is Anti-Reflection material. It can reduce reflection and improve the refractive index, reflection transmittance and light resistivity of the film. The principle of the AR film is that the light can produce secondary reflection on the surface of the AR film, which will interfere with the original reflected light, thereby utilizing the interference effect to eliminate the incident light and the reflected light, weaken the reflected light, and achieve the anti-reflection function; specifically, the AR film layer 3 is formed by back coating on the base film layer 1, and the material of the AR film layer 3 includes one of zirconium dioxide, titanium dioxide, magnesium fluoride, silicon dioxide, aluminum oxide or ZnSe. The thickness range of the AR film layer 3 is 0.1 to 5 μm, and the preferred thickness is 0.16 μm.

[0029] Reference Figure 1 and Figure 2 A plurality of particle structures 31 are arranged on the AR film layer 3. The particle structure 31 is a transparent material. The particle structure 31 includes large particles and small particles. The particle size of the large particles is 6 μm, the particle size of the small particles is 1 μm, and the number ratio of the large particles to the small particles is between 1:10 and 1:50. The particle structure 31 can generate a gap between the brightness enhancement film and the lower film, thereby improving the transmittance.

[0030] Take two samples of the AR brightness enhancement film of the utility model, namely sample 2 and sample 3, and one sample of the ordinary single bottom brightness enhancement film, namely sample 1, wherein the difference between the AR brightness enhancement film and the ordinary brightness enhancement film is that the AR brightness enhancement film is provided with an AR film layer 3 and a particle structure 31, and the rest of the structure is exactly the same. The BM-7 brightness colorimeter is used for testing, and the test results are shown in Table 1:

[0031] Table 1 BM-7 brightness and colorimeter test results

[0032]

[0033] As can be seen from Table 1, the brightness enhancement effect of the AR brightness enhancement film of the utility model is improved by more than 4.1% compared with the ordinary single-down brightness enhancement film, and there is no obvious chromaticity deviation;

[0034] In addition, the transmittance and haze tests were conducted on the AR brightening film of the utility model and the ordinary single-down brightening film. The results showed that the transmittance of the ordinary single-down brightening film was 88.5%, and the haze was 0.83%. The transmittance of the AR brightening film of the utility model was 92%, and the haze was 0.36%. It can be seen that the transmittance and haze of the AR brightening film of the utility model are better than those of the ordinary single-down brightening film.

[0035] It can be seen that since the AR film layer 3 has a good effect of reducing reflection and improving the refractive index of the film, by arranging the AR film layer 3 on the base film layer 1 and arranging the particle structure 31 on the AR film layer 3, the AR brightening film of the utility model has better brightening and light transmittance than the ordinary single-bottom brightening film, which solves the bottleneck problem of the brightening ability of the existing brightening film caused by material limitations.

[0036] The above is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. An AR brightness enhancement film, characterized in that: The invention comprises a base film layer (1), a prism structure layer (2) and an AR film layer (3), wherein the prism structure layer (2) and the AR film layer (3) are arranged on both sides of the base film layer (1), and a particle structure (31) is arranged on the AR film layer (3); the particle structure (31) is used to generate a gap between the brightness enhancement film and the underlying film; The prism structure layer (2) comprises a plurality of prisms (21) extending and distributed along a plane; the prisms (21) are triangular prisms (21), and the edges of the tops of the triangular prisms (21) present a corrugated undulating structure along their length direction.

2. The AR brightness enhancement film according to claim 1, characterized in that: The particle structure (31) includes large particles and small particles, and the number ratio of the large particles to the small particles is between 1:10 and 1:

50.

3. The AR brightness enhancement film according to claim 2, characterized in that: The particle size of the large particles is 6 μm, and the particle size of the small particles is 1 μm.

4. The AR brightness enhancement film according to any one of claims 1 to 3, characterized in that: The material of the AR film layer (3) includes one of zirconium dioxide, titanium dioxide, magnesium fluoride, silicon dioxide, aluminum oxide or ZnSe.

5. The AR brightness enhancement film according to any one of claims 1 to 3, characterized in that: The thickness of the AR film layer (3) is in the range of 0.1 to 5 μm.

6. The AR brightness enhancement film according to any one of claims 1 to 3, characterized in that: The thickness of the base film layer (1) ranges from 38 to 250 μm.

7. The AR brightness enhancement film according to claim 6, characterized in that: The thickness of the base film layer (1) is 50 μm.

8. The AR brightness enhancement film according to any one of claims 1 to 3, characterized in that: The height of the prism (21) is between 10-100 μm.

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