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Ultra-thin and large-size direct-lit backlight module

A technology of backlight module and large size, applied in the field of ultra-thin and large-size direct-lit backlight modules, can solve the problems of high cost, thick thickness, increased cost, etc., and achieve the effect of reducing thickness, thin thickness and simple structure

Active Publication Date: 2017-08-15
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the traditional direct-type backlight module is not only costly, but also relatively thick, and the current thickness is generally greater than 25mm
On the other hand, it also increases the cost due to the need to use two to three diffusion films to achieve uniform light effect

Method used

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  • Ultra-thin and large-size direct-lit backlight module
  • Ultra-thin and large-size direct-lit backlight module
  • Ultra-thin and large-size direct-lit backlight module

Examples

Experimental program
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Embodiment Construction

[0049] see figure 1 to Figure 3. The ultra-thin and large-size direct-lit backlight module of the present invention includes a circuit board 41 , a surrounding frame 42 , a bottom reflection sheet, several lenses 100 and at least one diffusion film 6 .

[0050] Several LEDs 43 are arranged on the circuit board 41 . The surrounding frame 42 is fixed on the peripheral side of the circuit board 41 and forms a box shape together with the circuit board 41 . The top end of the surrounding frame 42 is provided with a groove, which can be used to fit structures such as a liquid crystal panel or a diffuser plate. The bottom reflector is fixed on the circuit board 41, and the bottom reflector has several installation through holes 50 corresponding to the several LEDs 43, so that the several LEDs 43 are respectively exposed from the several installation through holes 50. Several lenses 100 are installed on the circuit board 41 , and are respectively located in corresponding installati...

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Abstract

The invention provides an ultra-thin and large-size direct-lit backlight module, comprising: a circuit board, a surrounding frame, a bottom reflection sheet and a diffusion film, a plurality of LEDs are arranged on the circuit board; the surrounding frame is fixed on the periphery of the circuit board; the bottom reflection sheet It is fixed on the circuit board and has several installation through holes, and the several installation through holes correspond to several LEDs respectively; several lenses are installed on the circuit board and are respectively located in the corresponding installation through holes, and the top surfaces of the several lenses are On the same plane; the diffusion film is laid on the top surfaces of several lenses. The present invention greatly reduces the thickness of the backlight module on the basis of uniform light output, so the thickness of the ultra-thin large-size direct-lit backlight module of the present invention can be made very thin. At the same time, the present invention can use a smaller number of LEDs and a smaller number of diffusion films, which is beneficial to reduce costs.

Description

technical field [0001] The invention relates to a direct-down type backlight module, in particular to an ultra-thin large-size direct-down type backlight module suitable for an ultra-thin large-size liquid crystal display. Background technique [0002] LED (Light Emitting Diode) backlight modules can be roughly divided into two types: direct type and edge type. The direct-lit LED backlight module does not require a light guide plate. The LED array is placed at the bottom of the light box. The light emitted from the LEDs is reflected from the bottom and sides, and then evenly emitted through the surface diffusion plate and optical module. Compared with the side light source, the direct-lit backlight LED can dynamically control the backlight lighting area, so that when expressing images of some dark scenes, only the necessary backlight area (appears as black or darker parts on the screen) needs to be adjusted. Local lighting can show high-quality image effects with natural li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357F21Y115/10
Inventor 杜雪王波张家儁李荣彬李敏行王文奎黄卓明郑伯龙郑小虎寇晓君李力行何熙
Owner THE HONG KONG POLYTECHNIC UNIV