Direct backlight module

Abstract

The invention relates to a direct backlight module which comprises a frame, a plurality of light-emitting diodes, a diffusion plate and an optical plate, wherein the optical plate is arranged above the diffusion plate at intervals; the diffusion plate comprises a first surface and a second surface which is opposite to the first surface, and the second surface of the diffusion plate is close to thelight-emitting diodes; the optical plate comprises a transparent body which comprises a first surface and a second surface that is opposite to the first surface, and the second surface of the opticalplate is close to the light-emitting diodes; the first surface of the diffusion plate is a plane, and the diffusion plate comprises a plurality of long-strip V-shaped ridge structures which are formed at the second surface and extend along at least two different directions; and the optical plate comprises a plurality of parallel long-strip arc-shaped heaves which are formed on the first surface and a plurality of parallel long-strip arc-shaped grooves which are formed on the second surface. The direct-lighting backlight module has better exit ray uniformity and is suitable for thinned design.

Description

Technical field [0001] The invention relates to a direct type backlight module, in particular to a direct type backlight module applied to liquid crystal display. Background technique [0002] Liquid crystal display devices are widely used in electronic products such as personal digital assistants, notebook computers, digital cameras, mobile phones, and LCD TVs. However, since the liquid crystal display device itself cannot emit light, it needs a backlight module to produce a display function. [0003] See figure 1 , A direct type backlight module 100, which includes a frame 10, a reflective plate 12, a plurality of light emitting diodes 14, a diffuser plate 16, and a plurality of optical sheets 18. A plurality of light-emitting diodes 14 are arranged on the bottom plate of the frame 10, and a plurality of optical sheets 18 are arranged at the opening of the frame 10. The diffusion plate 16 is arranged at intervals between the light emitting diode 14 and the plurality of optical ...

AI Technical Summary

Problems solved by technology

However, increasing the depth of the frame will reduce the brightness of the outgoing light

If the number of light-emitting diodes 14 is increased correspondingly, the production cost and power consumption during use will be increased, and increasing the depth of the frame 10 will make it difficult for the backlight module 100 to meet the requirements of thin design

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