Light guide plate and backlight module provided therewith

Abstract

The invention relates to a light guide plate and a lateral incident type backlight module. The light guide plate is provided with a light receiving surface which is opposite to a light source and positioned on at least one side of the light guide plate, and a light emergent surface adjacent to the light receiving surface, wherein the light receiving surface is provided with a plurality of horizontal grooves or horizontal embossed strips extending along the thickness direction of the light guide plate; the plurality of horizontal grooves or horizontal embossed strips are arranged along the length direction or width direction of the light guide plate; and the light receiving surface is also provided with longitudinal grooves or longitudinal embossed strips extending along the length direction or width direction of the light guide plate. In the invention, a light beam emitted from the LED light source is incident into the light guide plate and then a divergence angle of the light beam is increased or maintained, so as to shorten a dark band on the light emergent surface of the light guide plate, and increase a visible area of a liquid crystal display; in addition, the longitudinal grooves or longitudinal embossed strips are additionally arranged, so that the structure of the light receiving surface of the light guide plate can be more complicated, and the light receiving area of the light guide plate is increased, thus further improving the rate of incidence of light rays, and the light emitting uniformity of the backlight module.

Description

technical field [0001] The invention relates to a light guide plate used for liquid crystal displays or liquid crystal televisions, and a backlight module with the light guide plate. Background technique [0002] With the advent of the information age, the development of liquid crystal displays (LCDs) has advanced by leaps and bounds. The current backlight module is usually composed of a light guide plate, a diffusion sheet, a prism sheet, a reflector, and a light-emitting element (LED or CCFL, cold cathode lamp) and the like. Traditional backlight modules usually use CCFL light sources, but this light source has problems such as high power consumption, high starting voltage, short service life, and the presence of harmful substances such as mercury, and has been gradually eliminated by the market. [0003] It is replaced by LED light-emitting components. Using LED as a light source has the advantages of low power consumption, stable light emission, long service life, no ha...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new type of light guide plate and backlight module, which can improve the light receiving rate of the light guide plate and solve the problem of uneven brightness existing in ordinary light guide plates

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