TWM364862U - Light diffuser - Google Patents

Abstract

A light diffuser is disclosed. The light diffuser includes a substrate, a diffusing layer having a plurality of primary bumps, and a plurality of secondary bumps protruding from the plurality of primary bumps. The diffusing layer is disposed on the substrate, and each of the primary bump has a protrusive height of no more than about 40 μm, and each of the secondary bumps has a protrusive height of no more than about 15 μm.

Description

M364862 V. New description: [New technical field] The present invention relates to an optical diffusing element, and in particular to an optical diffusing film applied to a display. [Prior Art] 'Liquid crystal display (LCD) cannot self-illuminate, and a backlight module' is required to provide the required light source. In the back module, a set of _ optical film is usually set to evenly distribute the brightness of the backlight module in the display area and improve the brightness performance of the liquid crystal display. The so-called optical film usually comprises a diffusion film. The diffusion film is disposed between the light source and the liquid crystal panel to uniformly distribute the light generated by the light source in the display area. For the diffusion film which is uniform in brightness uniformity, a conventional technique such as Taiwan Patent No. 583084, 1296338, M299302, etc. is prepared by adding a medium particle, and each of the fine particles is used to achieve diffusion. The effect of light. The material added to the diffusion layer is mostly glass, and its hardness is usually much larger than that of a general resin, so that scratches on the surface of the optical diffusion film are often caused in the manufacturing process. Another type of optical diffusing film, such as the patent of Taiwan Patent No. M338358, discloses the use of a concave and convex structure which forms an irregular condensation on the surface of the diaphragm to achieve the effect of diffusing light. Although, using irregularities

Claims (1)

M364862 VI. Patent application scope: 1. An optical diffusion film comprising: a substrate; a diffusion layer having a plurality of primary coagulations disposed on the substrate, and each of the main coagulation groups having a protrusion The height is not more than 40 μπι; and a plurality of secondary condensation groups are protruded on the main condensation groups, and each of the secondary condensation groups has a convex height of not more than 15 /xm. 2. The optical diffusing film of claim 1, wherein each of the primary coacervates has a width of from 20/xm to 80/mi. 3. The optical diffusion film of claim 1, wherein each of the secondary coacervates has a width of from 5 μm to 30 ptm. 4. The optical diffusing film of claim 1, wherein a ratio of a height of each of the secondary agglomerates to a height of protrusion of each of the primary coagulations is from 1/10 to 1/2. 5. The optical diffusion film of claim 1, wherein the distribution of the secondary coacervates is irregularly distributed. The optical diffusing film of claim 1, wherein the material of the diffusion layer is a photohardenable transparent resin. 7. The optical diffusion film of claim 1, wherein the secondary agglomerated material is a photohardenable transparent resin. 8. The optical diffusing film of claim 1, wherein the substrate is a transparent polycarbonate (PC) substrate or a transparent polyethylene terephthalate (PET) substrate. 18