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Direct type back light module

A backlight module, direct type technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as the decrease of light uniformity of the LED backlight module and the depression of the auxiliary diffuser plate 22, etc.

Active Publication Date: 2006-01-25
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, if figure 1 and figure 2 As shown, the reflection sheet 16, the diffuser plate 18 and the auxiliary diffuser plate 22 are only erected on the backlight module base 12 by using their respective edge parts. When the area is increased, the added weight will make the diffuser plate 18 and the auxiliary diffuser plate 22 The phenomenon of depression
This concave phenomenon is an unacceptable shortcoming for liquid crystal display products that emphasize light uniformity, because once the flatness of the diffuser plate 18 and the auxiliary diffuser plate 22 is poor, the overall light uniformity of the LED backlight modules 10 and 20 will be serious. decline, and the larger the size of the liquid crystal display product, the more serious this shortcoming will be

Method used

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  • Direct type back light module
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  • Direct type back light module

Examples

Experimental program
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Embodiment Construction

[0022] see image 3 , which is a schematic diagram of the first embodiment of the direct type backlight module of the present invention. The backlight module 30 includes a substrate 32 , a screw cap 33 , an auxiliary diffuser 34 , a support column 35 , a diffuser 36 and a light emitting diode 37 .

[0023] Wherein, the substrate 32 can be a circuit board (PCBA), which is electrically connected to the LEDs 37 and used to control the LEDs 37 . The circuit board is arranged on a backlight module base 39 , and is erected on the backlight module base 39 by its edge portion. Again, this circuit board has a plurality of holes 321, and the upper half of the light-emitting diode 37 has a light-emitting portion 371, and the lower half has a light-emitting diode base 372. The light-emitting diode base 372 is embedded in the hole 321, and the light-emitting portion 371 is exposed on the on this circuit board.

[0024] The nut 33 is disposed on the base plate 32 , and can be disposed on...

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PUM

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Abstract

The invention discloses a vertical downward backlight module, comprising substrate, screw cap, assistant diffusion plate, a support, diffusion plate and at least a LED, where the screw cap is arranged on the substrate, the assistant diffusion plate is carried on the screw cap and the support comprises cone column and screw, the cone column comprises cone top and bottom, the screw stands out of the cone bottom through the assistant diffusion plate and combines with the screw cap. And the diffusion plate is carries on the cone top and these LEDs are arranged under the assistant diffusion plate.

Description

technical field [0001] The invention relates to a direct-down type backlight module, in particular to a direct-down type backlight module with a double-layer diffusion plate. Background technique [0002] Liquid crystal display (LCD) technology has been used in portable electronic products such as notebook computers, mobile phones, digital cameras, camcorders, and PDAs. The liquid crystal panel (LCD panel) is the most critical display component in this field. However, it does not emit light by itself, and needs to be provided with a backlight source for display. Currently, there are many backlight technologies, and in large-size (about 20 inches or more) liquid crystal display products, a direct-type backlight module (bottom lighting module) is often used as the backlight of the liquid crystal panel. Due to the increasing development of electroluminescence technology, it has become a development theme to apply light emitting diodes (Light Emitting Diode, LED) as the light s...

Claims

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Application Information

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IPC IPC(8): G02F1/1335
Inventor 周信宏
Owner AU OPTRONICS CORP