Fabrication method of quantum dot lens-type direct LED backlight source

A technology of LED backlight source and manufacturing method, applied in optics, nonlinear optics, instruments, etc., can solve the problems of complex manufacturing process of quantum dot backlight source, easy agglomeration failure of materials, low light conversion efficiency, etc., so as to reduce the difficulty and product quality. The effect of defective rate, improved color gamut value, and simple process

Inactive Publication Date: 2017-05-31
WUHU JUFEI PHOTOELECTRIC TECH CO LTD
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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 existing quantum dot backlight has complex manufacturing process, high cost, low light conversion efficiency, easy agglomeration of materials and unsatisfactory color gamut value, thus proposing a simple manufacturing process and low cost Method for manufacturing quantum dot lens type direct-lit LED backlight with low cost and excellent color rendering effect

Method used

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  • Fabrication method of quantum dot lens-type direct LED backlight source
  • Fabrication method of quantum dot lens-type direct LED backlight source
  • Fabrication method of quantum dot lens-type direct LED backlight source

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Effect test

Embodiment 1

[0030] This embodiment provides a method for manufacturing a quantum dot lens type direct LED backlight, which includes the following steps:

[0031] a. Weigh 0.08g of luminescent material A, which is CsPbCl with an emission wavelength of 530nm 3 , CsPbI 3 Green light quantum dot phosphor, wherein, the CsPbI 3 Fluorescent powder is 0.04g, weigh 24g of epoxy packaging glue, mix it with luminescent material A, and vacuum defoam and stir to obtain fluorescent glue A. The quantum dot phosphor is in powder form, or it can be dispersed in a solvent shape;

[0032] b. Drop the fluorescent glue A into the LED bracket fixed with the light-emitting chip, control the volume of the fluorescent glue A to account for 90% of the cup shell volume of the bracket, the light-emitting chip is a blue light chip with a wavelength of 455nm, and drop The LED bracket with fluorescent glue A is placed in an oven, baked at 80°C for 8 hours to obtain LED lamp beads; then select a suitable FPC accordin...

Embodiment 2

[0038] This embodiment provides a method for manufacturing a quantum dot lens type direct LED backlight, which includes the following steps:

[0039] a. Weigh 1.86g of luminescent material A, said luminescent material A includes 0.52g of silicate green phosphor powder with emission wavelength of 540nm, 1.34g of fluoride red phosphor powder with emission wavelength of 625nm, and weigh 1.86g of organic Silicone encapsulating glue, mixing it with luminescent material A, vacuum defoaming and stirring, to obtain fluorescent glue A;

[0040] b. Drop the fluorescent glue A into the LED bracket fixed with the light-emitting chip, and control the volume of the fluorescent glue A to account for 100% of the volume of the cup shell of the bracket. The light-emitting chip is an ultraviolet light chip with a wavelength of 290nm, and The LED bracket dripped with fluorescent glue A is placed in an oven, baked at 160°C for 0.5h to obtain LED lamp beads; then select a suitable FPC according to ...

Embodiment 3

[0046] This embodiment provides a method for manufacturing a quantum dot lens type direct LED backlight, which includes the following steps:

[0047] a. Weigh 0.12g of luminescent material A, said luminescent material A includes 0.02g of ZnTe green light quantum dot phosphor powder with emission wavelength of 526nm, 0.1g of nitride red light phosphor with emission wavelength of 526nm, and weigh 3.05g of epoxy Encapsulation glue, and mix it with luminescent material A, vacuum defoaming and stirring, to obtain fluorescent glue A, the quantum dot fluorescent powder is in powder form, or can also be in a solvent dispersed form;

[0048] b. Drop the fluorescent glue A into the LED bracket fixed with the light-emitting chip, control the volume of the fluorescent glue A to account for 95% of the cup shell volume of the bracket, the light-emitting chip is a blue light chip with a wavelength of 440nm, and drop The LED bracket with fluorescent glue A is placed in an oven, baked at 120°C...

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Abstract

The invention discloses a fabrication method of a quantum dot lens-type direct LED backlight source. The method comprises the following steps of firstly preparing a fluorescent adhesive A and dropping the fluorescent adhesive A into an LED bracket; preparing a quantum dot fluorescent adhesive B and coating the surface of an LED lens with the quantum dot fluorescent adhesive B and then coating the surface of the quantum dot fluorescent adhesive B with an ultraviolet-curing adhesive protection layer. A quantum dot fluorescent material is adopted by the quantum dot fluorescent adhesive B and the half-wave width is small, so that the color gamut value of the LED backlight source can be greatly improved and the color gamut value can reach over 96% of NTSC. Quantum dot fluorescent powder is prepared in the fluorescent adhesives, so that the problem of agglomeration and failure of the quantum dot fluorescent powder is solved. The fabrication method is simple in process and low in cost, and industrial production is easy to implement. Meanwhile, the quantum dot fluorescent adhesive B coats the LED lens, and is coated with packaging glue for protection, so that erosion of moisture and oxygen to the quantum dot fluorescent material is reduced, meanwhile, the quantum dot fluorescent material is prevented from being in direct contact with a light-emitting chip and being affected by a high temperature of the light-emitting chip, and the reliability of a lamp bead is improved.

Description

technical field [0001] The invention belongs to the technical field of LED backlight sources, and relates to a method for manufacturing a backlight source, in particular to a method for manufacturing a quantum dot lens type direct-lit LED backlight source. Background technique [0002] As the mainstream display technology in various fields in today's society, liquid crystal display is more and more favored by people. With the advancement of technology and the improvement of people's living standards, people's requirements for the quality of liquid crystal display equipment are also getting higher and higher, especially in terms of color gamut and In terms of brightness. In order to improve the performance of liquid crystal display, light-emitting diodes (LEDs) have gradually replaced traditional cold-cathode fluorescent tubes and become a new generation of liquid crystal display due to their advantages of small size, low energy consumption, low heat generation, long life, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/48H01L33/50H01L33/54G02F1/13357
CPCG02F1/133603G02F1/133606G02F1/133607G02F1/133614H01L33/486H01L33/504H01L33/508H01L33/54H01L2933/0041H01L2224/48091H01L2924/181H01L2924/00014H01L2924/00012
Inventor 高丹鹏张志宽邢其彬苏宏波
Owner WUHU JUFEI PHOTOELECTRIC TECH CO LTD
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