Diffusion plate, backlight module and display device

Abstract

The invention discloses a diffusion plate, a backlight module and a display device, and relates to the technical field of liquid crystal display. The diffusion plate comprises a light incident surface and a light emergent surface. Concave surfaces for receiving incident light rays are formed in the light incident surface, and convex surfaces which correspond to the concave surfaces and are used for emerging light rays are arranged on the light emergent surface. The diffusion plate, the backlight module and the display device have the advantages that the backlight module is thin, and the diffusion plate is used for the backlight module.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a diffusion plate, a backlight module and a display device. Background technique [0002] Liquid crystal display, as a non-self-luminous display device, needs to be used together with a backlight module to display images normally. At present, the backlight module usually uses LED (Light Emitting Diode, light emitting diode), CCFL (Cold Cathode Fluorescent Lamp, cold cathode fluorescent tube) as light-emitting elements, in the direct-lit backlight module, in order to make the light emitted by the backlight more uniform and provide sufficient and uniform light source for the liquid crystal display, a diffuser plate is generally installed in the backlight module to diverge the light More uniform, so as to provide a uniform surface light source for the liquid crystal display. [0003] figure 1 It is a schematic diagram of the structure of the existing backlight modul...

AI Technical Summary

Problems solved by technology

[0003] figure 1 It is a schematic diagram of the structure of the existing backlight module. The diffusion plate 1 in the existing backlight module is a flat structure. On the diffuser plate 1, since the existing backlight modules usually use light-emitting elements such as LEDs as light sources, and light-emitting elements such as LEDs have a certain light-emitting angle, there needs to be a sufficient light mixing distance, that is, to maintain a certain distance between the light source and the diffuser plate. In order to make the light emitted by the light source evenly irradiate the diffuser plate, it is conducive to the divergence of light and avoid bright spots on the backlight module due to insufficient light mixing distance, but when the number of light sources is larger or the spacing is smaller , the existing backlight module using a flat diffuser plate needs to increase the light mixing distance to make the light uniformly diverge, which will increase the thickness of the backlight module, making it difficult to thin the entire backlight module

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