Backlight module

Abstract

A backlight module comprises a main light source device and a second light source device, wherein the main light source device comprises at least two sub light source devices which are in the same plane and arranged adjacently; the each sub light source device is provided with an individual first light emitting surface, and a first light is emitted from the first light emitting surface; the second light source device is arranged on the main light source device, and provided with a second light emitting surface; the second light emitting surface is far away from the first light emitting surface, and the second light emitting surface contains at least one light emitting area; the each light emitting area is arranged at an adjacent position of the at least two sub light source devices; and the second light source device emits a second light from at least one light emitting area. The backlight module of the present invention can achieve the requirements of high light emitting efficiency, high brightness, high uniformity, high mechanism strength, simple structure, light weight and so on, and has the advantages of low manufacturing cost and easy design for liquid crystal display panels with different sizes.

Description

technical field [0001] The invention relates to a backlight module (back-light module). And in particular, the present invention relates to a backlight module with a double-layer light source structure. Background technique [0002] As is known to all, a liquid crystal display device uses a liquid crystal panel to display images. However, the liquid crystal panel itself does not emit light, and the so-called backlight module must be used to achieve the light emitting function, so the backlight module is an important component of the liquid crystal display device. [0003] Most of the current backlight modules use light-emitting diodes as the light source, and their structures are roughly divided into direct-lit backlight modules and edge-lit backlight modules. The direct-type backlight module has the advantages of high light extraction efficiency, no need for a light guide plate, and fewer components, but it also has disadvantages such as low light uniformity and thicker m...

AI Technical Summary

Problems solved by technology

However, the light guide plate still has considerable thickness, resulting in the edge-lit backlight module still too heavy

Moreover, the design of the microstructure on the light guide plate depends on the size of the LCD panel, that is to say, the design of the light guide plate for small-sized LCD panels cannot be applied to the edge-lit backlight module for large-sized LCD panels.

For large-sized LCD panels, the light guide plates in some edge-lit backlight modules are even composed of multiple small-sized light guide plates, which leads to complex overall structures, difficult positioning of light guide plates, increased assembly difficulty, reduced overall structural strength, and low mass production. Reduction, relative cost increase and other issues

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