Backlight module, diffusion plate and curved display device of curved display device

Abstract

The invention discloses a backlight module and a diffusion plate of a curve display device and the curve display device, and aims to saving a light guide plate, reducing the phenomenon of non-uniform light and shade of a displayed image as well as improving the display effect of the display device. The backlight module comprises a rear board with a sunken part, a light source and the diffusion plate, wherein the light source and the diffusion plate are positioned in the sunken part; the light source comprises lighting bodies which are positioned on two opposite sides of the diffusion plate; a light guide structure is arranged on the light incoming surface of the diffusion plate and can be used for reflecting light emitted by the lighting bodies on the two sides as well as diffusing to the side of the light outgoing surface of the diffusion plate. According to the backlight module, the curvature of the diffusion plate, the structure of the light incoming surface and the position of the light source are changed, so that the light generated by the light source can be uniformly reflected by the diffusion plate and diffused to the side of the light outgoing surface of the diffusion plate, and as a result, the phenomenon of concentrated light at two sides can be reduced.

Description

Technical field [0001] The present invention relates to the technical field of displays, in particular to a curved display backlight module, a diffuser and a curved display device. Background technique [0002] With the development of display technology and the increasing requirements for user experience, curved liquid crystal display products have also emerged. The liquid crystal display panel has certain flexibility and can realize a curved liquid crystal display; since the liquid crystal itself cannot emit light, a curved liquid crystal display requires a backlight module with a curved light distribution. [0003] At present, the backlight modules of curved display devices are mainly divided into direct type and side-entry type. Among them, the side-entry type backlight module mainly receives light from double short sides, but in this way, for the curved display device, the light guide plate is directed Curved downwards, a lot of light is emitted on the side of the light-incide...

AI Technical Summary

Problems solved by technology

[0003] At present, the backlight modules of curved display devices are mainly divided into direct-type and side-type. Among them, the side-type backlight module mainly uses double short-side light input, but in this way, for curved display devices, the light guide plate When the light is curved downward, there is a lot of light coming out on both sides of the light guide plate where the light incident surface is located, and the brightness is high, while the brightness of the center of the light guide plate is relatively low, and the center of the screen on the whole display is dark; for the direct type backlight module group, the LED lights used need secondary lenses to diverge the light emitted by them, and the overall cost is very high

And if it is necessary to achieve a small light mixing distance, it is more likely to appear uneven brightness and darkness in the display screen

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