Backlight module and liquid crystal display device

Abstract

The invention relates to a backlight module and a liquid crystal display device. The backlight module comprises at least a light guide plate, at least a light-emitting unit and a circuit board, wherein each light guide plate is provided with a main plate body and at least an extension part protruding from one side of the main plate body; the light-emitting units are adjacent to the extension parts; and the circuit board is electrically connected with the light-emitting units. The invention has the following beneficial effects: the invention can ensure the light not to cause bright spots or bright lines because of being directly projected on the optical films so as to meet the requirement of uniform light emitting, and the invention can substantially shorten the distances between the optical films and the light guide plates so as to reduce the thickness of the backlight module.

Description

technical field [0001] The invention relates to a liquid crystal display device, in particular to a backlight module in the liquid crystal display device. Background technique [0002] The backlight module converts the light generated by the linear or point light source into uniform planar light through the light guide plate, so as to serve as the plane light source required by the liquid crystal display. Compared with the cold-cathode fluorescent tubes used in the early backlight modules, the light-emitting diodes have obvious energy-saving characteristics and have sufficient brightness. Therefore, there are also increasing numbers of backlight modules using light emitting diodes as light sources. [0003] Such as figure 1 Shown is a prior art backlight module 100 which has a light emitting diode 12 disposed between two light guide plates 11 . The light-emitting diodes 12 inject light laterally toward the light guide plates 11, and the light guide plate 11 is separated f...

AI Technical Summary

Problems solved by technology

but when figure 1 When the light-emitting diode 12 adopts a light-emitting diode with higher brightness, it will cause the gap 15 between the light-emitting diode 12 and the light guide plate 11, and the part of the light guide plate 11 adjacent to the light-emitting diode 12, there will be a higher light density. Therefore, the brightness of the area above the light-emitting diode 12 of the diffusion sheet 13 is obviously higher than that of other areas, and the requirement of uniform light emission cannot be achieved.

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