Straight-down negative-light module

Abstract

The invention relates to a direct-type backlight module, which includes a light guide plate, several support frames and several light sources. A plurality of support frames are arranged in several grooves on the bottom surface of the light guide plate, and the light guide plate is provided with notches matched with the support frames at both ends of the grooves. The direct-type backlight module with this structure has high and uniform luminous brightness; the overall thickness is reduced to realize thinning of the backlight module; the light source can be replaced without dismantling the backlight module, and maintenance is convenient.

Description

【Technical field】 [0001] The invention relates to a direct type backlight module. 【Background technique】 [0002] Liquid crystal display is a kind of non-self-luminous display device, and its display is mainly realized by controlling the passing or not passing of the light beam emitted by the external light source. Therefore, an external light source and a corresponding light guide device are usually required, such as a backlight module. The light beam emitted by the external light source is directed to the display panel. [0003] Since the innovation of the weight and volume of the display device is achieved by the effective flattening of the display, the backlight module plays an important role in effectively utilizing the light source. On the premise of flattening the size of the display, how to make use of the characteristics of light to make each area of ​​the backlight module have sufficient and uniform brightness is the key direction for improving the structure of th...

AI Technical Summary

Problems solved by technology

However, the light output brightness of the liquid crystal display panel directly above the light source 23 is still brighter than the light output brightness of the area between the two light sources, resulting in the problem that the light output brightness of the plane light source is still not uniform, and the image brightness presented by the liquid crystal display is still not high. uniform

Since the diffusion plate 21 and the light source 23 need to maintain a certain distance, the diffusion plate 21 can show the preset light diffusion effect, and if the diffusion plate 21 is too close to the light source 23, the effect of uniform light diffusion cannot be achieved. Therefore, the direct type backlight module 20 has the problem that the thickness cannot be reduced, and because the backlight module 20 uses a diffusion plate 21, the light energy loss of the diffusion plate 21 is relatively large, and the thickness is relatively thick and the weight is relatively large, so the thinning of the backlight module 20 cannot be realized.

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