Direct type backlight module and liquid crystal display device

Abstract

The invention discloses a direct type backlight module and a liquid crystal display device. The direct type backlight module comprises at least two light sources, a diffusion plate arranged above the light sources, a reflection sheet arranged below the light sources, an optical film arranged above the diffusion plate, a plurality of through holes arranged at the position between two adjacent corresponding light sources and a liquid crystal panel arranged above the optical film. Through the mode, thinning of the liquid crystal display device can be achieved in the condition of uniform brightness of the direct type backlight module.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to a direct-lit backlight module and a liquid crystal display device. Background technique [0002] With the rise of flat-panel TVs, flat-panel TVs basically replace CRT (Cathode Ray Tube, cathode ray tube display), wherein, LCD TV is a kind of flat-panel TV. [0003] Since the liquid crystal panel itself of the liquid crystal TV cannot emit light, a backlight module needs to provide a light source to realize image display on the liquid crystal panel. According to the different installation positions of the light sources, there are two types of backlight modules in the prior art: direct-type and side-type. Such as figure 1 as shown, figure 1 It is a structural schematic diagram of a direct-lit backlight module in the prior art, and the direct-lit backlight module includes an optical film 101 , a diffusion plate 102 and a light source 103 . figure 1 The optical film 101 is c...

AI Technical Summary

Problems solved by technology

However, the thickness of the direct-lit backlight module will be relatively thick, which is not conducive to the thin design of LCD TVs

If the light mixing distance D is reduced, the thickness of the direct-lit backlight module can be reduced, but this will lead to uneven brightness of the backlight module

like figure 2 As shown, the light above the corresponding light sources 203 will be brighter, while the light above the corresponding light sources 203 will be relatively dark, resulting in uneven brightness

Wherein, the luminescence corresponding to the upper part between the light sources 203 is relatively dark, the main reason is that less light reaches the upper part between the light sources 203, and such a small light is absorbed by the optical film 201, so that the emitted light from this position The light will be reduced again, resulting in a darker glow at this location

[0005] The existing technology usually increases the number of light bars to try to solve the technical problem of uneven lighting, but this will increase the cost

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