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Method for obtaining high-color-gamut white-light LED through red-light fluorescent powder

A technology of red phosphor powder and realization method, applied in the field of white light LED backlight, can solve the problems of low color gamut value of white light LED backlight source, difficult particle size control, poor color reproduction degree, etc., and achieves simple packaging process and high excitation efficiency , the effect of low equipment requirements

Active Publication Date: 2016-04-20
SHENZHEN JUFEI OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that the color gamut value of the white light LED backlight source in the prior art is low, the degree of color reproduction is poor, the excitation efficiency is low, and the particle size is difficult to control. High color gamut white LED realization method

Method used

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  • Method for obtaining high-color-gamut white-light LED through red-light fluorescent powder
  • Method for obtaining high-color-gamut white-light LED through red-light fluorescent powder

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Embodiment 1

[0038] This embodiment provides a method using MASiO 4 :Eu 3+ A method for realizing a white light LED with a high color gamut of red phosphor powder, comprising the following steps:

[0039] 1) Weigh 5.40g of encapsulation glue A and 2.70g of encapsulation glue B according to the mass ratio of 2:1, and mix them evenly to obtain a mixed encapsulation glue. The encapsulation glue A and the encapsulation glue B are epoxy A type of encapsulation glue, the viscosity of the mixed encapsulation glue is 8000mPa·S, and the refractive index is 1.43;

[0040] 2) Weigh the fluorescent powder according to the emission wavelength of the chip: the chip is an ultraviolet chip, and the emission peak value is 350nm. According to the mass ratio of 1:1:2.5, weigh 1.53g of MASiO with a peak wavelength of 635nm 4 :Eu 3+ Red phosphor, 1.53g of silicate green phosphor with a peak wavelength of 544nm and 3.83g of aluminate blue phosphor with a peak wavelength of 480nm, the three phosphors were add...

Embodiment 2

[0044] This embodiment provides a method using MASiO 4 :Eu 3+ A method for realizing a white light LED with a high color gamut of red phosphor powder, comprising the following steps:

[0045] 1) According to the mass ratio of 3:1, weigh 7.20g of packaging glue A and 2.40g of packaging glue B, and mix them evenly to obtain a mixed packaging glue. The packaging glue A and the packaging glue B are silicone Class encapsulation glue, the viscosity of the mixed encapsulation glue is 600mPa·S, and the refractive index is 1.45;

[0046] 2) Weigh the fluorescent powder according to the emission wavelength of the chip: the chip is an ultraviolet chip, and the emission peak value is 365nm. According to the mass ratio of 4:1:5, weigh 1.28g of MASiO with a peak wavelength of 640nm 4 :Eu 3+ Red phosphor, 0.32g of silicate green phosphor with a peak wavelength of 540nm and 1.60g of nitride blue phosphor with a peak wavelength of 458nm, the three phosphors are added to the mixed encapsulan...

Embodiment 3

[0050] This embodiment provides a method using MASiO 4 :Eu 3+ A method for realizing a white light LED with a high color gamut of red phosphor powder, comprising the following steps:

[0051] 1) Take 5.80g of encapsulation glue A and 0.58g of encapsulation glue B according to the mass ratio of 10:1, and mix them evenly to obtain a mixed encapsulation glue. The encapsulation glue A is an epoxy-type encapsulation glue, and the encapsulation glue Glue B is a silicone-based packaging glue, the viscosity of the mixed packaging glue is 3700mPa·S, and the refractive index is 1.51;

[0052] 2) Weigh the fluorescent powder according to the emission wavelength of the chip: the chip is an ultraviolet chip, and the emission peak value is 300nm. According to the mass ratio of 10:1:4.5, weigh 4.00g of MASiO with a peak wavelength of 645nm 4 :Eu 3+ Red phosphor, 0.40g of silicate green phosphor with a peak wavelength of 525nm and 1.80g of a nitride blue phosphor with a peak wavelength of ...

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Abstract

The invention discloses a method for obtaining a high-color-gamut white-light LED through red-light fluorescent powder. The red-light fluorescent powder is red-light fluorescent powder MAlSiO4:Eu3+. The method includes the following steps of firstly, weighing different types of fluorescent powder according to the transmitting wavelength of a chip, and adding the fluorescent powder to mixed package resin, wherein the chip is an ultraviolet chip or a blue-light chip; secondly, evenly stirring a mixture obtained in the first step, dropwise adding the mixture into an LED support cup shell with the chip; thirdly, curing the package resin to obtain a white-light LED lamp bead. The adopted red-light fluorescent powder is red-light fluorescent powder MAlSiO4:Eu3+ and has high color purity, the color gamut value of the LED backlight lamp bead can be remarkably increased to be 88% or above, and after the high-color-gamut white-light LED is used for a liquid crystal backlight, the color revivification degree of a display screen can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of white LED backlights, and in particular relates to a method for realizing a high color gamut white LED using red phosphor powder. Background technique [0002] At present, the global white LED backlight industry continues to flourish, especially in the application of mobile phone and computer backlight, which has infinite potential. Compared with traditional CCFL backlight, LED backlight has high color gamut, high brightness, long life, energy saving and environmental protection, With many advantages such as real-time color control, the high-color-gamut LED backlight makes the screens of electronic products such as TVs, mobile phones, and tablet computers that use it have more vivid colors and a higher degree of color reproduction. [0003] In order to make the color of the display screen more perfect, richer in color, and closer to real-world colors, many R&D technicians are committed to finding and impr...

Claims

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Application Information

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IPC IPC(8): H01L33/50
CPCH01L33/502H01L2933/0041
Inventor 高丹鹏邓炼健邢其彬
Owner SHENZHEN JUFEI OPTOELECTRONICS
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