Direct illumination-type backlight module and liquid crystal display device

Abstract

The invention discloses a direct illumination-type backlight module and a liquid crystal display device. The direct illumination-type backlight module comprises a reflection sheet, LED light bars, and a backboard. The backboard is provided with a plurality of rectangular rib stations at intervals, the LED light bars are distributed on the rectangular rib stations, and the reflection sheet is provided with a rectangular structure matching the rectangular rib stations. Because the LED light bars are arranged on the rectangular rib stations of the backboard, and the reflection sheet matching the structure of the backboard is configured, angles of light emitting from the LED light bars are not direct to a diffuser plate, while the light exits from slopes of the rectangular rib stations, the actual optical distance is larger than the linear distance between a backboard and a diffuser plate in the prior art, the optical distance can be increased without increase of thickness of a product, and both of the thickness of the product and the visual effect of the product can be considered.

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] Direct type LCD backlight module, such as figure 1 As shown, it mainly includes module backplane, reflector, direct-type LED light strip, diffuser plate, optical film and liquid crystal panel and other components. Direct-type LED light strip mainly includes PCB board, LED and optical lens and other components. [0003] In the traditional direct type LCD backlight module design, the LED is equipped with an optical lens corresponding to the light mixing distance (the light mixing distance is the distance from the reflector to the lower surface of the diffuser plate), and the matched reflector The film uniformly transmits light energy to the liquid crystal panel to form a direct-lit liquid crystal module. [0004] However, in the prior art, after the light mixing distance of the b...

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Problems solved by technology

[0006] In view of the above deficiencies in the prior art, the object of the present invention is to provide a direct-type backlight module and a liquid crystal display device, aiming at solving the problem that the thickness and visual effect of the existing direct-type backlight module are difficult to take into account at the same time

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