White light LED light source, backlight module and display device

An LED light source and backlight module technology, applied in the field of liquid crystal display devices, can solve the problems affecting the display effect of the liquid crystal display device, low color gamut and low color purity of the display device, etc., so as to improve the display effect, improve the color purity, and expand the color domain effect

Inactive Publication Date: 2014-10-22
BEIJING BOE VISION ELECTRONICS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the fluorescent powder in the fluorescent module is a mixed fluorescent powder of green fluorescent powder and red fluorescent powder, and because the color purity of the red fluorescent powder in the white LED light source is low, the light emitted by the white LED light source is neutral. The color purity of red light is low, so that the color gamut of the liquid crystal display device using the white LED light source as the backlight is low, generally about 30% under the CIE1976 standard, which affects the display effect of the liquid crystal display device

Method used

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  • White light LED light source, backlight module and display device
  • White light LED light source, backlight module and display device
  • White light LED light source, backlight module and display device

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Experimental program
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Effect test

Embodiment 1

[0026] Please refer to figure 2 , the first embodiment provides a white LED light source, including a light bar 1 with a plurality of LED lights 2;

[0027] Each LED lamp 2 has a chip that emits first color light and a fluorescent module that is excited by the first color light to emit second color light;

[0028] The light bar 1 is also provided with a plurality of lasers 3 that emit light of a third color to mix with light emitted by the LED lamp 2 to form white light.

[0029] In the above-mentioned white LED light source of Embodiment 1 of the present invention, the positive and negative pins of each LED lamp 2 are connected between two mutually insulated conductive metals that can be connected to the positive and negative poles of the power supply inside the light bar 1, and each The positive and negative terminals of the laser 3 are also connected across two mutually insulated conductive metals that can be connected to the positive and negative terminals of the power s...

Embodiment 2

[0039] Embodiment 2 provides a backlight module, which includes at least one white LED light source provided in Embodiment 1 above.

[0040] Since the color purity of the third color light part in the light generated by the white LED light source provided in Embodiment 1 is relatively high, therefore, in the backlight module provided in Embodiment 2 having the white LED light source provided in Embodiment 1 above, the backlight The color purity of the third color light part in the backlight emitted by the module is relatively high, so that the color gamut of the liquid crystal display device can be expanded, and the display effect of the liquid crystal display device can be improved.

[0041] In a preferred embodiment, the backlight module is a side-in type, and also includes a light guide plate, and the light-emitting surface of the white LED light source is opposite to the side of the light guide plate, wherein a lens for expanding the beam of the laser is embedded in the lig...

Embodiment 3

[0043] Embodiment 3 provides a liquid crystal display device, which includes the backlight module provided in Embodiment 2 above.

[0044] Based on the advantages of the backlight module provided in the above-mentioned embodiment two, the liquid crystal display device provided in the third embodiment with the above-mentioned backlight module can display more color gamuts, thereby increasing the liquid crystal display provided in the third embodiment. The brightness of the displayed color of the device improves the display effect of the liquid crystal display device.

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Abstract

The invention discloses a white light LED light source, a backlight module and a liquid-crystal display device. The white light LED light source comprises a lamp bar provided with a plurality of LED lamps; each LED lamp is provided with a chip and a fluorescence module, wherein the chip emits first color light, and the fluorescence module is excited by the first color light to emit second color light. The lamp bar is further provided with a plurality of laser devices, and third color light is emitted by the laser devices and mixed with the light emitted by the LED lamps to form white light. According to the white light LED light source, the laser devices are used for replacing fluorescent powder which can emit the third color light after being excited by the chip in the fluorescence module in the prior art, the third color light in the light emitted by the white light LED light source is directly provided by the laser devices, and the color purity of the third color light in the light emitted by the white light LED light source is improved, so that the color gamut of the liquid-crystal display device with the white light LED light source is widened, and then the display effect of the display device is improved.

Description

technical field [0001] The invention relates to the field of liquid crystal display devices, in particular to a white LED light source, a backlight module and a display device. Background technique [0002] A liquid crystal display device usually includes a display panel and a backlight module, and the display panel itself does not emit light, and usually needs to be connected to the backlight module to provide it with the light source required for normal display. In this way, the luminous effect of the backlight module directly affects the display. The display effect of the panel further affects the visual effect of the liquid crystal display device during use. At present, the light source of the backlight module in the liquid crystal display device mainly adopts: Cold Cathode Fluorescent Lamp (CCFL) and Light Emitting Diodes (Light Emitting Diodes, LED). Because LED light sources have many advantages such as high brightness, high color purity, long life, good reliability,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V19/00F21V23/00G02F1/13357F21Y101/02
CPCG02B6/0068G02B6/0073G02B6/0026
Inventor 张晓何建民张丽杰
Owner BEIJING BOE VISION ELECTRONICS TECH
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