Light guiding plate and backlight module

Abstract

The invention discloses a light guiding plate and a backlight module. The backlight module comprises a light source device and a light guiding plate. The light source device comprises a plurality of point light sources arranged along an extension direction, and the point light sources can be respectively used to provide a light beam. The light guiding plate comprises a rectangular main body and two triangular protruding parts. The main body is provided with a first light-incoming surface, a light-outgoing surface, and a bottom surface with respect to the light-outgoing surface. The first light-incoming surface is adjacent to the bottom surface and the light-outgoing surface, and the first light-incoming surface is in the shape of a rectangle, and is extended along the extension direction. The protruding parts are respectively protruded from one of the two short edges of the first light-incoming surface toward the extension direction. Each of the protruding parts is respectively provided with a second light-incoming surface and a reflective side surface, and the second light-incoming surface is adjacent to the first light-incoming surface, and is parallel to the first light-incoming surface. The light guiding plate and the backlight module can be used to provide the surface light source with high uniformity.

Description

technical field [0001] The present invention relates to an optical component, and in particular to a light guide plate and a backlight module thereof. Background technique [0002] With the progress of the display technology, the flat panel display has become the mainstream of the display and has replaced the position of the traditional cathode ray tube (CRT). Among the flat panel displays, a liquid crystal display (LCD) is most widely used by consumers. A general liquid crystal display is mainly composed of a backlight module and a liquid crystal panel. Since the liquid crystal panel itself does not emit light, a backlight module is required to provide a surface light source required for display. [0003] Generally speaking, the known backlight modules can be divided into direct-lit backlight modules and side-lit backlight modules. Taking the side-illuminated backlight module as an example, a light guide plate is generally used to guide the light emitted by a light-emitt...

AI Technical Summary

Problems solved by technology

These bright and dark areas will lead to uneven surface light source provided by the light guide plate, which is the so-called hot spot phenomenon.

Therefore, the dark and bright areas produced by the hot spot phenomenon will reduce the overall uniformity of the surface light source provided by the backlight module, and make it difficult to improve the overall optical quality of the liquid crystal display.

Although the hot spot phenomenon can be reduced by increasing the number of LEDs, however, increasing the number of LEDs will not only increase the cost, but also increase the overall temperature and reduce the service life of the LEDs

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