CN211206829U

CN211206829U - Light diffusion film

Info

Publication number: CN211206829U
Application number: CN201821070613.2U
Authority: CN
Inventors: 郭滨刚; 曾俊洋; 杨硕; 陈欣欣; 李州
Original assignee: Shenzhen Guangke Holographic Technology Co ltd
Current assignee: Shenzhen Guangke Holographic Technology Co ltd
Priority date: 2018-07-06
Filing date: 2018-07-06
Publication date: 2020-08-07
Anticipated expiration: 2028-07-06

Abstract

The utility model relates to a light diffusion membrane, light diffusion membrane includes substrate layer and diffusion layer, and the big diffusion particle of diffusion layer is arranged on the substrate according to the matrix mode, does not have the clearance between the adjacent big diffusion particle, and the junction between the big diffusion particle forms the continuous shape of convex-concave, and it has a plurality of little diffusion particles to distribute at its concave position, little diffusion particle distribution range is no longer than the height of the peak value line of two adjacent big diffusion particles of range on the substrate layer. Light diffusion membrane effectively enlarged the regional angle of light diffusion, make light diffusion more even, soft, full, effectively improve the scattering degree of consistency of diffusion membrane.

Description

Light diffusion film

Technical Field

The utility model relates to an optical projection material field, especially a light diffusion membrane.

Background

The light diffusion film is widely applied to devices needing light sources, such as a liquid crystal display, an advertising lamp box, an illuminating lamp and the like, particularly in the application of a liquid crystal display device and a L ED, the L ED and the liquid crystal display device mainly have the problems of nonuniform light rays, dazzling and the like in an optical layer, the application of the light diffusion film in the illumination and display fields is influenced, particularly in the rapid development of the liquid crystal display device and the wide application of the liquid crystal display device in mobile communication display screens, computer displays and large-size liquid crystal televisions in recent years, the performance requirement of the light diffusion film in the display device is gradually improved, the light diffusion film mainly has the function of improving the light brightness and softening the light, a uniform surface light source is provided for the display and the lamp, the visual angle is widened, and the problems of nonuniform light rays, dazzling and the like mainly exist in the optical layer of the L ED and the liquid crystal display device, and the application of the.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome prior art not enough, provide a light diffusion membrane, concrete technical scheme is as follows: the structure of the diffusion film enables light rays to pass through diffusion particles with different particle sizes and refractive indexes and generate refraction, reflection and scattering phenomena, so that the light ray radiation area is increased, the scattered light rays are soft and uniform, the chromaticity is stable, a uniform surface light source is formed, and the optical diffusion effect is achieved.

The technical proposal adopted by the utility model is that the light diffusion film comprises a transparent substrate layer and a diffusion layer, the substrate layer is one or a plurality of mixtures of PU, PP, PMMA, PET, PC and vinyl, the diffusion layer is a plurality of spherical, ellipsoidal, hemispherical, semi-ellipsoidal or triangular large diffusion particles which are arranged on the substrate in a matrix way, the particle diameter of the large diffusion particles is 20-40 um, the refractive index range is 1.4-2.2, there is no gap between adjacent particles, wherein only at most 1/2 spherical and ellipsoidal large diffusion particles are exposed on the surface of the substrate, the cross section forms a convex-concave continuous shape, a plurality of small diffusion particles with the particle size of 1um-7um are distributed at the concave position of the whole plane, the refractive index of the particles is in the range of 1.4-1.65, and the particle distribution range does not exceed the height of a connecting line of peaks of two adjacent large diffusion particles arranged on the substrate.

The utility model relates to a light diffusion membrane, this diffusion membrane have effectively enlarged the regional angle of light diffusion, make light diffusion more even, soft, full, fuzzy site, and clear, bright, vivid sensation is given to whole effect, effectively improves the scattering degree of consistency of diffusion membrane.

Drawings

Fig. 1 is a schematic cross-sectional view of a light diffusion film according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of a light diffusion film according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-2, a light diffusion film 10 for optical projection material, a transparent substrate layer 20 and a diffusion layer 30, wherein large diffusion particles 40 of the diffusion layer 30 are arranged on the substrate in a matrix manner, no gap exists between adjacent large diffusion, the cross section of the diffusion layer forms a convex-concave continuous shape, a plurality of small diffusion particles 50 are distributed in the whole plane concave position, and the distribution range of the small diffusion particles does not exceed the height of a peak connecting line 60 of two adjacent large diffusion particles arranged on the substrate.

The transparent substrate layer is made of transparent material, and is made of one or more of PU, PP, PMMA, PET, PC, vinyl, and the light transmittance of the transparent substrate layer is more than 70%, such AS PMMA, PC, PVC, PS, PET, PETG, transparent ABS, transparent PP, transparent PA, SAN (also called AS) (also called K resin), MS, MBS, PES, J.D series, CR-39, TPX, HEMA, F4, F3, EFP, PVF, PVDF, EP, PF, UP, cellulose acetate, cellulose nitrate, EVA, and the like, and modified derivatives of the above materials, and is made of one or more of the above materials.

As shown in fig. 1-2, the diffusion layer is a plurality of large diffusion particles in the shape of sphere, ellipsoid, hemisphere, triangle or hemi-ellipsoid arranged on the substrate in a matrix, and the embodiment of the present invention only shows the sphere or triangle, but is not limited thereto.

The large diffusion particles are arranged on the base material in a matrix mode, the particle size of the large diffusion particles is 20-40 um, the refractive index range of the large diffusion particles is 1.4-2.2, gaps do not exist between adjacent large diffusion particles, only 1/2 of the large diffusion particles with spherical and ellipsoidal sections are exposed on the surface of the base material layer at most, the sections of the large diffusion particles form a convex-concave continuous shape, a plurality of small diffusion particles with the particle size of 1-7 um are distributed in the whole plane recess, the refractive index range of the small diffusion particles is 1.4-1.65, and the distribution range of the small diffusion particles is not more than the height of a peak connecting line of two adjacent large diffusion particles arranged on the base material layer.

The large diffusion particles with triangular sections are basically exposed on the surface of the base material layer, continuous convex-concave shapes are formed among the triangles, a plurality of small diffusion particles with the particle size of 1-7 um are filled in the concave positions, and the distribution range of the small diffusion particles does not exceed the height of a peak connecting line of two adjacent large diffusion particles arranged on the base material layer.

The diffusion layer and the base material layer are bonded by one or more of a vacuum film forming process, a sol-gel film forming process and/or a self-organizing film forming process. The substrate layer and the diffusion layer are manufactured into a final product through composite processes such as hot pressing, gluing and the like. But is not limited to such methods.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The light diffusion film is characterized by comprising a base material layer and a diffusion layer, wherein large diffusion particles of the diffusion layer are arranged on the base material layer in a matrix mode, gaps do not exist between the adjacent large diffusion particles, the connection positions between the large diffusion particles form a convex-concave continuous shape, a plurality of small diffusion particles are distributed in concave positions of the large diffusion particles, and the distribution range of the small diffusion particles does not exceed the height of a peak connecting line of two adjacent large diffusion particles arranged on the base material layer.

2. The light diffusion film of claim 1, wherein the cross-section of the large diffusion particles of the diffusion layer is one of spherical, ellipsoidal, hemispherical, semi-elliptical, or triangular, and the shape of the small diffusion particles is one of circular, elliptical, and conical.

3. The light diffusion film of claim 2, wherein when the large diffusion particles are spherical or ellipsoidal, only at most 1/2 are exposed on the surface of the base material layer, and the cross section of the large diffusion particles is formed in a continuous convex-concave shape.

4. The light diffusion film of claim 1, wherein the large diffusion particles have a particle size of 20um to 40um and a refractive index ranging from 1.4 to 2.2.

5. The light diffusion film of claim 1, wherein the small diffusion particles have a particle size of 1um to 7um and a refractive index in the range of 1.4 to 1.65.

6. The light diffusion film of claim 1, wherein the large diffusion particles have a refractive index greater than or less than a refractive index of the small diffusion particles.