Backlight module and diffusion plate thereof

Abstract

A diffusion plate is made of a transparent body doped with diffusion particles. The transparent body comprises a first surface and a second surface opposite to the first surface; the first surface is provided with a plurality of micro grooves which are all of rectangular pyramid shapes; every six adjacent micro grooves with a common connection point form a hexagram; the second surface is provided with a plurality of long strip arc grooves. The diffusion plate can improve efficient utilization ratio of light and enjoy high uniformity of light emission. The invention also relates a backlight module adopting the diffusion plate.

Description

technical field [0001] The invention relates to a backlight module and a diffusion plate thereof, in particular to a backlight module for liquid crystal display and a diffusion plate thereof. Background technique [0002] See figure 1 , shows a conventional direct-lit backlight module 100, which includes a frame 11, a plurality of light sources 12 disposed inside the frame 11, and a diffusion plate 13 disposed above the light sources 12 and covering the frame 11. [0003] In use, the light generated by the plurality of light sources 12 can be diffused after entering the diffuser plate 13 . However, after being diffused by the diffuser plate 13, the angles at which light emerges from the diffuser plate 13 become more chaotic, so that its brightness in a specific viewing angle range is not high; It is still often difficult for the plate 13 to directly diffuse the light from the light source 12 evenly, so that the light emitted from the diffuser plate 13 is prone to light sou...

AI Technical Summary

Problems solved by technology

[0005] However, when the light is transmitted in the prism sheet 10 and the upper diffusion sheet 14, part of the light will be absorbed and cause light loss; The number of interfaces increases the interface loss of light transmission and reduces light utilization

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