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Back light module and liquid crystal display

A technology of backlight module and light beam, which is applied in the direction of static indicators, semiconductor devices of light-emitting elements, instruments, etc., can solve the remaining 45% of the problems, and achieve the effect of improving the overall brightness and increasing the utilization rate of photons

Active Publication Date: 2009-07-08
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when applying the existing backlight module or liquid crystal display, the utilization rate of photons after the white light-emitting diode passes through the polarizer is only about 45%.

Method used

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  • Back light module and liquid crystal display
  • Back light module and liquid crystal display
  • Back light module and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0048] Please refer to Figure 1A , which shows a schematic structural view of the first embodiment of the backlight module according to the present invention. The backlight module of this embodiment includes: a reflective base 10 , a red fluorescent material layer 20 , a plurality of LED assemblies 30 and an optical film 40 .

[0049] The red fluorescent material layer 20 is disposed on the bottom surface or the side surface of the reflective base 10, and the LED assembly 30 is disposed above the reflective base 10 and the red fluorescent material layer 20, and can emit a first light beam P 1 +S 1 ; Wherein, the light-emitting diode assembly 30 is composed of blue light-emitting diodes and green light-emitting diodes, or blue light-emitting diodes and green phosphors, so as to generate blue light and green light, the first light beam P 1 +S 1The wavelength range is between 420 nanometers (nm) and 580 nanometers (nm). The optical film 40 is disposed above the reflection ba...

no. 2 example

[0054] Please refer to Figure 2A , which shows a schematic structural view of the second embodiment of the backlight module according to the present invention. The backlight module of this embodiment includes: a reflective base 10 , a fluorescent material layer 22 including red fluorescent materials and green fluorescent materials, a plurality of LED components 32 and an optical film 42 .

[0055] The fluorescent material layer 22 is disposed on the bottom surface or the side surface of the reflective base 10, and the LED assembly 32 is disposed above the reflective base 10 and the fluorescent material layer 22, and can emit a first light beam P 1 +S 1 ; Wherein, the light-emitting diode assembly 32 is made up of blue light-emitting diodes, the first light beam P 1 +S 1 The wavelength range is between 420 nanometers (nm) and 500 nanometers (nm). The optical film 42 is disposed above the reflection base 10 , the fluorescent material layer 22 and the LED assembly 32 . Ther...

no. 3 example

[0059] Please refer to image 3 , which shows a schematic structural view of the third embodiment of the backlight module according to the present invention. In this embodiment, the yellow fluorescent material layer 24 is used to replace the fluorescent material layer (red and green fluorescent materials) 22 of the second embodiment of the present invention, and the reflected S polarized light S 1 The wavelength range is also between 420 nanometers (nm) and 500 nanometers (nm), and the arrangement and characteristics of other components are the same as those of the second embodiment, please refer to the second embodiment of the present invention, and will not repeat them here.

[0060] The first light beam P of the first, second and third embodiments of the invention 1 +S 1 Both contain blue light with the strongest wavelength range between 440 nanometers (nm) and 490 nanometers (nm).

[0061] Various embodiments of the present invention are described below, which adjust or...

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Abstract

The invention relates to a backlight module and a liquid crystal display comprising the same. The backlight module is provided with a reflecting base, and a fluorescent material layer is arranged on the reflecting base; and a plurality of blue light emitting dioxide components are arranged above the reflecting base and the fluorescent material layer and emit first light beams. An optical membrane is arranged above the reflecting base, the fluorescent material layer and the blue light emitting dioxide components, is used for P polarization light of the first light beams to transmit, and reflects S polarization light of the first light beams to the fluorescent layer so as to excite the fluorescent layer to generate second light beams with different wave length from that of the first light beams. The second light beams are reflected to the optical membrane through the reflecting base, then can transmit the optical membrane, and are mixed with the first light beams to generate white light.

Description

【Technical field】 [0001] The invention relates to a backlight module and a liquid crystal display, in particular to a backlight module and a liquid crystal display capable of improving photon utilization. 【Background technique】 [0002] A liquid crystal display (Liquid Crystal Display; LCD) is one of the most widely used display technologies at present. The components that make up the liquid crystal display include many optical components, such as polarizers and color filters. Generally speaking, the polarizing plate will cause about 50% of the incident light loss, and the color filter will cause about 60% of the incident light loss. Therefore, when the light passes through these components, only about 20% of the incident light remains, which will cause a loss of the brightness of the backlight module or the liquid crystal display. [0003] Due to rising awareness of environmental protection, white light-emitting diodes (Light-Emitting Diodes; LEDs) have the advantages of ...

Claims

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Application Information

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IPC IPC(8): F21S8/00F21S19/00F21V7/00F21V7/22F21V9/14G02F1/13357G02F1/133F21Y101/02F21Y113/02F21Y115/10
Inventor 林俊良徐雅玲王英力王俊杰廖烝贤
Owner AU OPTRONICS CORP
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