A kind of LED backlight liquid crystal display device and coating method of luminescent material thereof

A technology of liquid crystal display devices and luminescent materials, which is applied in optics, nonlinear optics, instruments, etc., can solve the problems that are not conducive to improving the color gamut of LCD display equipment, the requirements for filter performance of color filters are high, and the purity of incident light sources is low. Achieve the effects of rich display colors, improved spectral color purity, and enhanced color gamut

Active Publication Date: 2015-10-28
北京易美新创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1) The working temperature of the LED chip is high. Due to the thermal quenching of the luminescent material itself, the packaging form of the luminescent material coated on the surface of the chip causes the brightness of the light source to attenuate more seriously at the working temperature than at normal temperature;
[0007] 2) Using white LEDs as the backlight source, the incident light source purity of the RGB color film of the LCD display device is low, and the filter performance of the color film is high, which is not conducive to improving the color gamut of the LCD display device, and the energy loss of the light source is large

Method used

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  • A kind of LED backlight liquid crystal display device and coating method of luminescent material thereof
  • A kind of LED backlight liquid crystal display device and coating method of luminescent material thereof
  • A kind of LED backlight liquid crystal display device and coating method of luminescent material thereof

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Embodiment 1

[0039] Such as figure 1 , 2 As shown, the present invention is composed of LED light source module 1, phosphor substrate 3, TFT substrate 4, liquid crystal 5 and color filter substrate 6, LED chip 2 is packaged in LED light source module 1, and red and green phosphors are coated on On an independent transparent substrate, it has the same shape and corresponding color as the RGB color filter.

[0040] The production method is as follows: 1) Encapsulation glue is used to encapsulate the blue LED chip into the bracket, and after drying, it is welded to the aluminum substrate in series to form an LED light source module; 2) The nano-phosphor is deposited by evaporation Coating on a transparent substrate to prepare a phosphor substrate; 3) Coating frame sealant around the TFT array substrate, and spreading spacers with a size of 5 to 10 m on it as support points; 4) Combining steps 2 and 3 The result is combined in sequence with the phosphor substrate, TFT array substrate and col...

Embodiment 2

[0042] Such as image 3 As shown, the present invention is composed of an LED light source module 1, a TFT substrate 4, a liquid crystal 5 and a color filter substrate 6, an ultraviolet LED chip 2 is packaged in the LED light source module 1, RGB luminescent materials are coated on the TFT array substrate, Same shape and corresponding color as RGB color film.

[0043] The production method is as follows: 1) Encapsulate the ultraviolet LED chip into the bracket with packaging glue, and weld it to the ceramic substrate in series after drying to form an LED light source module; Powder coated on the TFT array substrate; 3) Coat the frame sealant around the TFT array substrate, and spread spacers with a size of 5-10 μm on it as support points; 4) Combine the TFT array substrate and the color filter substrate , forming an empty box between the TFT substrate and the color film substrate, injecting liquid crystal into it to obtain a liquid crystal panel; 5) combining the ultraviolet ...

Embodiment 3

[0045] Such as Figure 4 As shown, the present invention is composed of an LED light source module 1, a TFT substrate 4, a liquid crystal 5 and a color filter substrate 6. The blue LED chip 2 is packaged in the LED light source module 1, and the fluorescent powder is coated on the color filter substrate, and the RGB The color filters have the same shape and corresponding colors.

[0046] The production method is as follows: 1) Use encapsulation glue to package the blue LED chip into the bracket, and after drying, weld it to the aluminum substrate in series to form an LED light source module; 2) Use the evaporation method to combine red and green Nano phosphors are coated on the color film substrate, and the shape and position correspond to the red and green color film; 3) Coat the sealant around the TFT array substrate, and spread 5-10μm spacers on it for support Point; 4) Combine the TFT array substrate and the color film substrate, form an empty box between the TFT substrat...

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Abstract

The invention discloses an LED (light emitting diode) backlight liquid-crystal display device and a coating method for luminescent materials thereof. The LED backlight liquid-crystal display device comprises an LED light source module, a luminescent material substrate, a TFT (thin film transistor) substrate, a liquid crystal and a color film substrate. An LED chip is sealed in the LED light source module, a luminescent layer coated with RGB (red, green and blue) luminescent materials is arranged between the color film and the liquid crystal or between the liquid crystal and the LED light source module, the shapes of the RGB luminescent materials are the same as the shape of an RGB color film, and the colors of the RGB luminescent materials are corresponding to the color of the RGB color film. The invention further discloses a coating method for luminescent materials of the LED backlight liquid-crystal display device. In an LCD (liquid crystal display) device produced by the coating method, the luminescent materials and the chip are sealed and packaged separately, and operating temperatures of the luminescent materials are reduced, so that luminance loss of the luminescent materials caused by temperature quenching is avoided.

Description

technical field [0001] The invention relates to an LED backlight liquid crystal display device and a method for coating the luminescent material thereof, belonging to the field of semiconductor lighting. Background technique [0002] Compared with the traditional cathode ray tube (Cathode Ray Tube, CRT), liquid crystal display (Liquid Crystal Display, LCD) has the characteristics of small size, light weight, long service life, energy saving and environmental protection, and has gradually replaced the traditional CRT display. [0003] Liquid crystal display (LCD) itself cannot emit light, and needs to achieve display effect by modulating external light. Most of the existing LCDs are transmissive, and the backlight source is an indispensable part of it. Therefore, its brightness, power consumption, color performance and other indicators all depend on the performance of the backlight source. Therefore, the backlight module is an indispensable part of the LCD TV. As the main c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357G02F1/1333
Inventor 王涛孙国喜刘国旭
Owner 北京易美新创科技有限公司
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