Direct type backlight module and liquid crystal display comprising the backlight module

Abstract

The utility model discloses a direct backlight module and a liquid crystal display unit which comprises the backlight module; wherein, the backlight module comprises a light guiding plate, a reflector, a plurality of light sources and a plurality of optical films. The light guiding plate comprises a first surface and a second surface; wherein, the first surface comprises a plurality of first grooves; the reflector is positioned under the second surface of the light guiding plate; each light source is positioned between the first surface of the light guiding plate and the reflector, and each light source corresponds with each of the first grooves to fully reflect the light emitted by the light source; the optical films are positioned above the first surface of the light guiding plate. The utility model can effectively reduce the total thickness of the backlight module to avoid uneven brightness caused by the light source.

Description

technical field [0001] The invention relates to a direct-type backlight module and a liquid crystal display device comprising the backlight module, in particular to a direct-type backlight module comprising a light guide plate and a liquid crystal display device comprising the backlight module. Background technique [0002] refer to figure 1 , showing a schematic cross-sectional view of a conventional direct-lit backlight module. The conventional direct type backlight module 1 includes a plurality of lamps 11 , a diffuser plate 12 , a reflector 13 , a housing 14 and a plurality of optical films 15 . The backlight module 1 is located below a liquid crystal panel of a liquid crystal display device. The lamps 11 are cold cathode fluorescent lamps (cold cathode fluorescent lamp, CCFL) or light emitting diode lamps (LED light bar), for providing light. The diffuser plate 12 is disposed above the lamp tubes 11 for uniformly diffusing the light emitted by the lamp tubes 11 to th...

AI Technical Summary

Problems solved by technology

Usually the height of the light mixing area is more than 20 millimeters (mm), and under the known brightness requirements, the total thickness of the existing backlight module 1 cannot be effectively reduced after the number of the lamp tubes 11 is determined.

This shortcoming is an important issue that needs to be improved urgently for thin and light liquid crystal display devices.

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