Full spectrum LED light source module for LCD backlight

Abstract

The invention discloses a full spectrum LED light source module for LCD backlight. The full spectrum LED light source module for the LCD backlight comprises an LCD panel and LED backlight, and the component parts of the LCD panel comprise a polaroid, an upper glass substrate, a color filter, an alignment film, a liquid crystal unit, a TFT substrate, a lower glass substrate and a polaroid from top to bottom in sequence. The LED backlight comprises a fluorescent powder converting plate, a diffuser plate, a light guide plate, a reflector plate and LED chips. The fluorescent powder light turning plate comprises substrate materials and fluorescent powder. An LED chip array is placed on the side edge of the LED backlight by adopting a side edge mode. The fluorescent powder is a single zinc oxide system or one or more semiconductor nanocrystal fluorescent powder of zinc selenide, cadmium sulfide and cadmium selenide. The fluorescent powder converting plate is far away from the LED chip array, and an integral encapsulating mode is adopted by the LED chips. The full spectrum LED light source module for the LCD backlight reduces contact thermal resistance of the chips, is beneficial to overall heat dissipation of a light source, effectively lowers the using temperature of the fluorescent powder, and improves the consistency and color saturation of the spectrum in a long-term using process.

Description

technical field [0001] The invention relates to a full-spectrum LED light source module used for an LCD backlight source, and belongs to the field of luminescent materials or semiconductor lighting. Background technique [0002] LCD liquid crystal display is the abbreviation of Liquid Crystal Display. It is a flat and ultra-thin display device. It consists of a certain number of color or black and white pixels, which are placed in front of the light source or reflective surface. Liquid crystal displays consume very little power, making them favored by engineers for electronic devices that run on batteries. LCD overcomes the shortcomings of CRT (traditional cathode ray tube Cathode RayTube) bulky, power consumption and flickering, and now LCD has replaced CRT to become the mainstream. [0003] LCD backlight is mainly composed of light source, light guide plate, optical diaphragm, and structural parts. Among them, the backlight types mainly include EL, CCFL and LED. EL is el...

AI Technical Summary

Problems solved by technology

[0005] (1) The commonly used white light LED light source is mainly obtained by dispensing and coating, that is, the phosphor powder is directly coated on the surface of the chip. Due to the large heat generation of the chip, it will cause the phosphor to be heated after long-term use. Fluorescence quenching effect; at the same time, the white light prepared by this traditional method also has uneven light color caused by phosphor precipitation, which affects the visual effect of the display

[0006] (2) At present, most of the phosphors used in the preparation of white LEDs are red, green, and yellow phosphors of different systems. Due to the differences in the chemical and physical properties of the phosphors of each system, the aging attenuation and stability of each system during long-term use Inconsistencies in sex, easy to cause bad phenomenon of light and color mismatch

[0007] (3) The multiple white LEDs used in the LCD device are usually fixed on the light bar by means of a single white light series-parallel combination. This form of packaging increases the thermal resistance between the chip and the light bar. The adverse consequences of high chip temperature; at the same time, the cost is relatively high

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