Diffusion plate with dot-matrix diffusion structures and backlight module utilizing same

Abstract

The invention discloses a diffusion plate with dot-matrix diffusion structures. The dot-matrix diffusion structures are arranged on an out-light surface or an in-light surface of the diffusion plate, and centers of the diffusion structures correspond to light source centers of backlight sources one by one. The diffusion structures include two structures: the first structure includes that the center area of the first diffusion structure is a circular disc, hollow spots arranged in concentric circles are arranged on the circular disc, solid spots arranged in concentric circles are arranged outside the central area, and the first diffusion structure is coated on the solid spots and positions around the hollow spots on the circular disc; the second structure includes that circular rings arranged in concentric circles are distributed in the central area of the second diffusion structure, solid spots arranged in concentric circles are arranged outside the central area, and the second diffusion structure is coated on the circular rings and the solid spot areas. Intensities of diffusion structures on all circles of the first and the second structures become smaller and smaller from the center to the outside.

Description

technical field [0001] The invention relates to a diffusion plate in a backlight module, in particular to a diffusion plate with a dot-matrix diffusion structure applied in a backlight module adopting a dot-matrix backlight source. Background technique [0002] Currently, liquid crystal modules used in flat panel displays mostly use TFT-LCD technology. TFT-LCD is a non-active light-emitting display, usually with a white backlight module (Backlight Module) to provide uniform system brightness, and then through a color filter (Color Filter) to obtain rich color display. [0003] The current white light direct type backlight module includes a light source and an optical film set. Light-emitting diodes (LEDs) have become one of the light sources of LCD backlight modules due to their small size and low energy consumption. The light source of light-emitting diode (LED) has a Lambertian distribution, and its light distribution curve is characterized by a gradual attenuation accor...

AI Technical Summary

Problems solved by technology

In order to overcome the above-mentioned non-uniform light emission of dot-matrix LEDs, the existing technology (patent application number is CN201010002819.3) designs a diffusion structure on the diffusion plate. The diffusion structure is composed of a single pattern and has low production feasibility.

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