Asymmetrical light diffusion element and manufacturing method thereof

Abstract

The invention discloses an asymmetrical light diffusion element and a manufacturing method thereof, wherein the diffusion element is a light transmission film subject to stress extension, and the material of a substrate is mixed with diffusion grains made of different materials; an anisotropic film layer is formed by means of the process of stress extension and has the property of birefractive diffusion; an asymmetrical up-and-down structure is formed on the surface structure of the film layer by means of extrusion or multi-layer co-extrusion and extension, therefore, light passing through the diffusion element is diffused and then forms uniform light, has an anisotropic refractive index difference and can generate the effect of partial polarized scattering; wherein a better embodiment of the diffusion element comprises: a mould is prepared to be used for manufacturing the basic surface structure needed by the asymmetrical diffusion element, the body of the substrate with a surface micro-structure is manufactured by means of a roller wheel transfer printing process, and the body of the substrate undergoes the change of refractive index and the deformation of the basic structure by means of the stress extension process.

Description

technical field [0001] The present invention relates to an asymmetric light diffusion element and its manufacturing method, in particular, in the process of the diffusion element, stress is used to extend the substrate body mixed with particles and a surface structure to produce a diffusion with birefringence and asymmetric diffusion characteristic. Background technique [0002] The prior art uses a backlight module (Backlight) as a light source for flat-panel displays, and the backlight module usually has a light source, a light guide (Light guide) and a diffusion film that can distribute the light evenly, because the light sources in the backlight module are distributed like individual particles. LEDs, or light pipes arranged one by one, such as CCFL, so a diffusion plate and a diffusion film are needed to diffuse the uneven light. For example, a direct backlight (Direct Light) is the main light source of the TFT-LCD TV panel. The display effect is achieved by passing the...

AI Technical Summary

Problems solved by technology

[0006] Another existing technology is the ability to produce light diffusion through the substances in the substrate, but such methods are limited to the requirements of light refraction and scattering to achieve diffusion, and because the structure of the traditional diffusion film is random or close to circular, its The light diffusion is Axial symmetric. For the backlight light source or light box with different two-dimensional horizontal and vertical arrangement distances, such as LED array light source, an asymmetric diffusion film is required for asymmetric light diffusion processing and Effective use of viewing angle and luminance

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