Optical film based on incident light source bunching diffusion

Abstract

The utility model discloses an optical film based on incident light source bunching diffusion, which comprises a base layer film group, a light scattering film group and a light gathering film group, the light scattering film group is attached to the upper surface of the base layer film group, the light scattering film group comprises an upper bottom layer film and a light diffusion layer, the upper bottom layer film is attached to the upper surface of the base layer film group, and the light diffusion layer is attached to the upper surface of the light gathering film group. The upper surface of the upper bottom layer film is coated with the light diffusion layer, the light condensation film group is attached to the lower surface of the base layer film group, the light condensation film group comprises a lower bottom layer film and a light condensation layer, the lower bottom layer film is attached to the lower surface of the base layer film group, and the lower surface of the lower bottom layer film is coated with the light condensation layer. Therefore, the light diffusion layer and the light condensation layer which are positioned on the same axis are arranged, so that the incident light is condensed and then diffused, the brightness is improved, and a wider diffusion surface is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of optical films, in particular to an optical film based on the beaming and diffusion of incident light sources. Background Art

[0002] As a core component of mini LED backlight film assemblies, light diffusion films play a crucial role in backlight film assemblies for laptops, cars, monitors, TVs, and other appliances. They not only significantly enhance light brightness but also gently disperse it, ensuring the backlight assembly outputs a uniform, high-quality surface light source.

[0003] As backlight film assemblies pursue thinner profiles, effectively reducing the thickness of light diffusers has become a critical issue that needs to be addressed. While the widely used diffusers with prism structures currently meet this need to a certain extent, their operating principle limits light efficiency. Specifically, only incident light within a specific angle range can successfully pass through the light-entry surface formed by the prism structure. Light outside this range is reflected, which undoubtedly reduces the brightness of the diffuser film. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the purpose of the present invention is to propose an optical film based on the beam-focusing and diffusion of incident light sources, which is provided with a light-expanding layer and a light-collecting layer located on the same axis, so as to focus the incident light and then diffuse it, thereby improving the brightness and achieving a wider diffusion surface.

[0006] To achieve the above-mentioned purpose, the present invention proposes an optical film based on the focusing and diffusion of incident light sources, comprising a base film group, a light-scattering film group and a light-focusing film group, wherein the light-scattering film group is adhered to the upper surface of the base film group, the light-scattering film group comprises an upper base film and a light-expanding layer, wherein the upper base film is adhered to the upper surface of the base film group; the light-expanding layer is coated on the upper surface of the upper base film; the light-focusing film group is adhered to the lower surface of the base film group, the light-focusing film group comprises a lower base film and a light-focusing layer, wherein the lower base film is adhered to the lower surface of the base film group; the light-focusing layer is coated on the lower surface of the lower base film.

[0007] The optical film based on incident light source focusing and diffusion of the present invention is provided with a light expansion layer and a light focusing layer located on the same axis, thereby focusing the incident light and then diffusing it, thereby improving the brightness and achieving a wider diffusion surface.

[0008] In addition, the optical film based on incident light source beam focusing and diffusion proposed in the application may also have the following additional technical features:

[0009] Specifically, the light expansion layer includes an outer convex conical surface and an inner concave conical surface, wherein the outer convex conical surface is linearly arrayed and coated on the upper surface of the upper base film; the inner concave conical surface is linearly arrayed and coated on the upper surface of the upper base film, and the outer convex conical surface and the inner concave conical surface are abutted and connected to each other.

[0010] Specifically, the light-gathering layer includes an outer surface and an inner concave rectangular surface, wherein the outer surface linear array is coated on the lower surface of the light-gathering layer; the inner concave rectangular surfaces are multiple groups, and the multiple groups of inner concave rectangular surfaces are respectively arranged in the corresponding outer surface.

[0011] Specifically, the inner concave surface of the inwardly concave rectangular surface is an inclined end surface, the outer surface is a rectangular surface, and the area of ​​the inner rectangular surface of the inwardly concave rectangular surface is smaller than the area of ​​the outer surface.

[0012] Specifically, the base film group is a PET film, and the thickness of the base film group is 30 to 250 μm.

[0013] Specifically, the centers of each group of the light expansion layers and the corresponding light focusing layers are located on the same axis.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the light-diffusing film group of the utility model;

[0018] Figure 3 This is a schematic diagram of the light expansion layer structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the light-concentrating film group of the utility model;

[0020] Figure 5 This is a schematic diagram of the light-gathering layer structure of the utility model.

[0021] As shown in the figure: 10, base film group; 20, diffuser film group; 201, upper base film; 202, light expansion layer; 2021, convex conical surface; 2022, concave conical surface; 30, focus film group; 301, lower base film; 302, focus layer; 3021, outer surface; 3022, concave rectangular surface. DETAILED DESCRIPTION

[0022] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0023] The optical film based on incident light source beam focusing and diffusion according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0024] like Figure 1-5 As shown, the optical film based on incident light source focusing and diffusion according to the embodiment of the present invention includes a base film group 10 , a light-scattering film group 20 and a light-condensing film group 30 .

[0025] The light-diffusing film assembly 20 is attached to the upper surface of the base film assembly 10 . The light-diffusing film assembly 20 includes an upper base film 201 and a light diffusion layer 202 .

[0026] The upper and lower layers 201 are attached to the upper surface of the base layer assembly 10 , and the light diffusion layer 202 is coated on the upper surface of the upper and lower layers 201 .

[0027] It should be noted that the upper and lower layers 201 are coating layers, and a light diffusion layer 202 is generated during the condensation process of the upper and lower layers 201. The light diffusion layer 202 array is arranged on the upper surface of the base layer group 10, and the light beam is diffused by the light diffusion layer 202 when passing through.

[0028] The light-concentrating film assembly 30 is attached to the lower surface of the base film assembly 10 . The light-concentrating film assembly 30 includes a lower base film 301 and a light-concentrating layer 302 .

[0029] The lower base film 301 is attached to the lower surface of the base film assembly 10 , and the light focusing layer 302 is coated on the lower surface of the lower base film 301 .

[0030] It should be noted that the lower base film 301 and the upper base film 201 are made of the same material. A focusing layer 302 is generated during the coating and condensation process of the lower base film 301. The focusing layer 302 array is arranged on the lower surface of the base film group 10, and the light beam is focused by the focusing layer 302 when passing through.

[0031] In one embodiment of the present invention, Figure 3 As shown, the light expansion layer 202 includes an outer convex conical surface 2021 and an inner concave conical surface 2022 .

[0032] The convex conical surfaces 2021 are linearly arrayed and coated on the upper surface of the upper bottom film 201 , and the concave conical surfaces 2022 are linearly arrayed and coated on the upper surface of the upper bottom film 201 , and the convex conical surfaces 2021 and the concave conical surfaces 2022 are mutually abutted and connected.

[0033] It should be noted that the convex conical surface 2021 and the concave conical surface 2022 described in this embodiment are attached to each other and arrayed together to form a coating surface with alternating convex and concave surfaces.

[0034] In one embodiment of the present invention, Figure 5 As shown, the light-collecting layer 302 includes an outer surface 3021 and an inner concave rectangular surface 3022 .

[0035] The outer surface 3021 is linearly arrayed and coated on the lower surface of the light-collecting layer 302 . There are multiple groups of inwardly concave rectangular surfaces 3022 , and the multiple groups of inwardly concave rectangular surfaces 3022 are respectively arranged in the corresponding outer surface 3021 .

[0036] It should be noted that the light-concentrating layer 302 described in this embodiment is coated on the light-concentrating layer 302 , and the outer diameter of the inner concave surface 3022 gradually decreases toward the inner concave surface.

[0037] In one embodiment of the present invention, Figure 5 As shown, the inner concave surface of the concave rectangular surface 3022 is an inclined end surface, the outer surface 3021 is a rectangular surface, and the area of ​​the inner rectangular surface of the concave rectangular surface 3022 is smaller than the area of ​​the outer surface 3021 .

[0038] It should be noted that the concave rectangular surface 3022 is inclined and is formed on the outer surface 3021 in a proportionally reduced form.

[0039] In one embodiment of the present invention, Figure 1 As shown, the base film assembly 10 is a PET film, and the thickness of the base film assembly 10 is 30-250 μm.

[0040] It should be noted that the base film assembly 10 is made of PET, and the thickness of the base film assembly 10 is 30-250 μm. The specific thickness of the base film assembly 10 is set according to actual needs.

[0041] In one embodiment of the present invention, Figure 1-5 As shown, the centers of each set of light diffusion layers 202 and the corresponding light focusing layer 302 are located on the same axis.

[0042] It should be noted that after the light focusing layer 302 collects the light beam, the light beam passes through the light diffusing layer 202 on the same axis, and the light beam diffuses from the light diffusing layer 202 to achieve the effect of brightening and diffusing the light.

[0043] Specifically, the steps of preparing the diffuser film group 20 and the focusing film group 30 on the base film group 10 are as follows: coating the upper surface of the base film group 10 to generate the upper base film 201, and coating the surface of the base film group 10 to generate the diffuser film group 20 and the focusing film group 30 respectively. In the process of generating the diffuser film group 20 and the focusing film group 30, staggered convex conical surfaces 2021 and concave conical surfaces 2022 are formed, and the concave rectangular surface 3022 is located on the same axis as the center of the convex conical surface 2021 and the concave conical surface 2022, so that the light beam emission is first concentrated to enhance the brightness, and then diffused to scatter the light emission.

[0044] In summary, the optical film based on incident light source focusing and diffusion in the embodiment of the present invention is provided with a light expansion layer and a light focusing layer located on the same axis, thereby focusing the incident light and then diffusing it, thereby improving the brightness and achieving a wider diffusion surface.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present invention.

Claims

1. An optical film based on incident light source focusing and diffusion, characterized in that: It comprises a base film group (10), a light-scattering film group (20) and a light-focusing film group (30), wherein: The light-diffusing film group (20) is attached to the upper surface of the base film group (10). The light-diffusing film group (20) comprises an upper base film (201) and a light-diffusing layer (202), wherein: The upper and lower layers (201) are attached to the upper surface of the base layer film group (10); The light expansion layer (202) is coated on the upper surface of the upper base film (201); The light-concentrating film group (30) is attached to the lower surface of the base film group (10), and the light-concentrating film group (30) includes a lower base film (301) and a light-concentrating layer (302), wherein: The lower base film (301) is attached to the lower surface of the base film group (10); The light-gathering layer (302) is coated on the lower surface of the lower base film (301).

2. The optical film based on incident light source focusing and diffusion according to claim 1, characterized in that: The light expansion layer (202) comprises an outer convex conical surface (2021) and an inner concave conical surface (2022), wherein: The outer convex conical surface (2021) is linearly arrayed and coated on the upper surface of the upper base film (201); The concave conical surfaces (2022) are linearly arrayed and coated on the upper surface of the upper base film (201), and the convex conical surfaces (2021) and the concave conical surfaces (2022) are mutually abutted and connected.

3. The optical film based on incident light source focusing and diffusion according to claim 1, characterized in that: The light-collecting layer (302) includes an outer surface (3021) and an inner concave rectangular surface (3022), wherein: The outer surface (3021) is linearly arrayed and coated on the lower surface of the light-gathering layer (302); There are multiple groups of the inwardly concave rectangular surfaces (3022), and the multiple groups of the inwardly concave rectangular surfaces (3022) are respectively arranged in the corresponding outer surfaces (3021).

4. The optical film based on incident light source focusing and diffusion according to claim 3, characterized in that: The inner concave surface of the inwardly concave rectangular surface (3022) is an inclined end surface, the outer surface (3021) is a rectangular surface, and the area of ​​the inner rectangular surface of the inwardly concave rectangular surface (3022) is smaller than the area of ​​the outer surface (3021).

5. The optical film based on incident light source focusing and diffusion according to claim 1, characterized in that: The base film group (10) is a PET film, and the thickness of the base film group (10) is 30 to 250 μm.

6. The optical film based on incident light source focusing and diffusion according to claim 1, characterized in that: The centers of each group of the light expansion layers (202) and the corresponding light focusing layers (302) are located on the same axis.

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