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Preparation method of high-gamut white-light LED by using green fluorescent powder matched with red fluorescent powder

A technology of red fluorescent powder and fluorescent powder, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of low color reproduction, low color saturation, and low color gamut coverage of white LED backlight. Achieve the effect of adjustable color gamut coverage and high light efficiency

Inactive Publication Date: 2016-12-14
YICHANG HUIKE TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of low color gamut coverage of white LED backlights in the prior art, low color reproduction and low color saturation of the display screen

Method used

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  • Preparation method of high-gamut white-light LED by using green fluorescent powder matched with red fluorescent powder
  • Preparation method of high-gamut white-light LED by using green fluorescent powder matched with red fluorescent powder
  • Preparation method of high-gamut white-light LED by using green fluorescent powder matched with red fluorescent powder

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Embodiment Construction

[0022] A mixed phosphor that uses green light and red light, and the green phosphor is Si 6-Z Al Z o Z N 8-Z :Eu green phosphor,

[0023] Red phosphor is K x GeF y :Mn 4+ Red phosphor.

[0024] The emission wavelength of the blue light chip used to excite green light phosphors and red light phosphors is 445-465nm: Si used in the present invention 6-Z Al Z o Z N 8-Z :Eu green phosphor and K x GeF y :Mn 4+ Red light phosphor, its excitation peak is located in the range of 280-480nm; because the strong blue light and ultraviolet light produced when it is less than 445nm will cause harm to human eyes, further the wavelength used in the present invention is greater than 445nm, and when the wavelength of blue light is greater than 465nm, it will reduce In order to reduce the quantum efficiency of the fluorescent powder due to the excitation photon energy, the present invention further requires that the emission wavelength of the used blue light chip is 445-465nm.

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Abstract

The invention discloses a preparation method of a high-gamut white-light LED by using green fluorescent powder matched with red fluorescent powder. The green fluorescent powder is Si<6-Z>Al<Z>O<Z>N<8-Z>: Eu green fluorescent powder, and the red fluorescent powder is K<x>GeF<y>: Mn<4+> red fluorescent powder. By the preparation method, the problems of low gamut coverage rate of a backlight source of an existing white-light LED and low color reduction degree and low color saturation degree of a displayed picture are solved, and the gamut coverage rate reaching 80% or more can be achieved.

Description

technical field [0001] The invention discloses a method for preparing a high-color gamut white LED using green phosphor powder and red phosphor powder, which is used to improve the color gamut coverage of LED light sources in display device backlights. Background technique [0002] In LCD display devices, the liquid crystal itself does not emit light, but relies on the backlight LED light source to realize the screen light emission. Therefore, the key to improving the color gamut coverage of display devices is to increase the color gamut value of LED lamp beads. The color gamut coverage refers to the proportion of the color of the display in the visible light range of CIE1931. From the perspective of human perception of visible light, the higher the color gamut coverage, the higher the color saturation and the better the color reproduction. [0003] The color gamut coverage rate of conventional display equipment is about 72%. figure 1 As shown, it is realized by using a bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50
CPCH01L33/504H01L2933/0041
Inventor 丁仁雄敬鑫清杨涛
Owner YICHANG HUIKE TECH
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