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Direct light type backlight module

A backlight module and direct-type technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of low QD concentration, poor heat dissipation effect, low color stability, etc., and achieve the effect of increasing efficiency and high recovery

Inactive Publication Date: 2015-11-18
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the backlight module has poor heat dissipation effect and low color stability because the quantum dot film layer is attached to the blue LED backlight. In addition, it also has the problems of low QD concentration and low color conversion efficiency.

Method used

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Examples

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Embodiment Construction

[0036] In order to make the technical content disclosed in this application more detailed and complete, reference may be made to the drawings and the following various specific embodiments of the present invention, and the same symbols in the drawings represent the same or similar components. However, those skilled in the art should understand that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for schematic illustration and are not drawn according to their original scale.

[0037] The specific implementation manners of various aspects of the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] Figure 1A A schematic structural diagram of a direct type backlight module in the prior art is shown. refer to Figure 1A , the existing direct type backlight module mainly includes a blue LED backlight 100, a diffusion plate 102 above the blue LED...

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Abstract

The invention provides a direct light type backlight module which comprises a reflector plate, a plurality of blue LED backlight sources, a vacuum clearance layer and a quantum dot layer. The reflector plate is arranged on the bottom layer of the backlight module. The blue LED backlight sources are placed on the bottom edge of the backlight module. The vacuum clearance layer is arranged above the blue LED backlight sources. The quantum dot layer is used for converting blue light emitted by the blue LED backlight sources to be blue, green and red to enable the blue light to be close to white dots. Multiple irregular holes or porous vacuum clearances are arranged on or in the quantum dot layer, light is made to pass through the quantum dot layer repeatedly through light mixing space formed by the vacuum clearance layer, the irregular holes and the reflector plate, and then the color conversion efficiency is improved. Compared with the prior art, the heat insulation vacuum clearance layer and the irregular holes are utilized for clamping the quantum dot layer, the light emitted by the blue LED backlight sources can repeatedly pass through the quantum dot layer, then high recovery of the light is achieved, the color conversion efficiency is improved, and therefore the blue, green and red obtained after conversion are mixed to be close to white.

Description

technical field [0001] The invention relates to liquid crystal display technology, in particular to a direct-lit backlight module. Background technique [0002] In recent years, solid-state lighting light-emitting diodes (LEDs) have received a great deal of attention. The efficiency of existing LEDs has far exceeded that of traditional incandescent lamps. Generally speaking, solid-state lighting includes two typical architectures: one is a combination of red LEDs, green LEDs, and blue LEDs; the other is a combination of ultraviolet LED chips or blue LED chips with color conversion phosphors. Taking the latter as an example, a light conversion layer containing a color conversion phosphor often requires a high photoluminescence quantum efficiency, a suitable refractive index, good light fastness and the required luminescent color. Since quantum dot (QuantumDot, QD) is a light-emitting semiconductor crystal, it has a narrow and adjustable photoluminescence spectrum, high phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357
CPCG02F1/1336G02F1/133603G02F1/133605G02F1/133606G02F1/133614
Inventor 陈明伦杨承勳李吴重光
Owner AU OPTRONICS CORP
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