Method for improving blue light absorption by ink-jet printing quantum dot layer

A quantum dot layer and blue light absorption technology, which is applied in the manufacture of electrical components, electrical solid devices, semiconductor/solid devices, etc., can solve the problems of ink inward sag, uneven color, and reduced light extraction efficiency, and achieve an increase in absorption value and improvement The effect of blue light absorption

Inactive Publication Date: 2019-09-17
GUANGDONG POLY OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the curing shrinkage of the ink or the volatilization of the solvent, the ink will be sunken inward in the b

Method used

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  • Method for improving blue light absorption by ink-jet printing quantum dot layer
  • Method for improving blue light absorption by ink-jet printing quantum dot layer
  • Method for improving blue light absorption by ink-jet printing quantum dot layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The method for improving the blue light absorption of the inkjet printing quantum dot layer in this embodiment is as follows:

[0049] S1: transfer or attach the blue light source to the TFT substrate to form a substrate with several blue light pixels;

[0050] S2: Preparation of the first layer of quantum dot ink layer (fluorescent layer)

[0051] Filter 5ml of red quantum dot ink with a 220nm filter head, then add it to the ink cartridge, and install the ink cartridge on the printer to remove air bubbles. The quantum dot ink layer is obtained by printing the quantum dot ink into the QDCF device, and then photocuring in nitrogen. In other embodiments, quantum dot inks can also be printed (eg, screen printed) on QDCF devices. Such as Figure 4 As shown, when the quantum dot ink is printed or printed on the substrate 11 of the mold 1 , it is confined between the banks 12 of the mold 1 .

[0052] S3: Preparation of the second light diffusion layer

[0053] Recipe ing...

Embodiment 2

[0062] The method for improving the blue light absorption of the inkjet printing quantum dot layer in this embodiment is as follows:

[0063] S1: transfer or attach the blue light source to the TFT substrate to form a substrate with several blue light pixels;

[0064] S2: Preparation of the first layer of quantum dot ink layer (fluorescent layer)

[0065] Filter 5ml of red quantum dot ink with a 220nm filter head, then add it to the ink cartridge, and install the ink cartridge on the printer to remove air bubbles. The quantum dot ink layer can be obtained by printing the quantum dot ink into the QDCF device, and then curing it in nitrogen. The above curing method can be thermal curing, in one embodiment, the curing energy can be 500mj / cm 2 , The curing temperature is not higher than 150°C.

[0066] S3: Preparation of the second light diffusion layer

[0067] Recipe ingredients:

[0068] Diffusion powder (silicone microspheres): 6.25 parts

[0069] Silicone SCR1011: 93.75...

Embodiment 3

[0075] The method for improving the blue light absorption of the inkjet printing quantum dot layer in this embodiment is as follows:

[0076] S1: transfer or attach the blue light source to the TFT substrate to form a substrate with several blue light pixels;

[0077] S2: Preparation of the first layer of quantum dot ink layer (fluorescent layer)

[0078] Filter 5ml of green quantum dot ink with a 220nm filter head, then add it to the ink cartridge, and install the ink cartridge on the printer to remove air bubbles. The quantum dot ink layer can be obtained by printing the quantum dot ink into the QDCF device, and then curing it in nitrogen.

[0079] S3: Preparation of the second light diffusion layer

[0080] Titanium dioxide R902+: 11.2 parts

[0081] L-21 light curing adhesive: 88.8 parts

[0082] Add the diffusion powder titanium dioxide R902+ into L-21, grind and defoam in the yellow light environment, then scrape the mixed colloid on the surface of the green device t...

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Abstract

The invention provides a method for improving blue light absorption by an ink-jet printing quantum dot layer, and the method comprises the following steps: S1, transferring or attaching a blue light source to a TFT substrate, and forming a substrate with a plurality of blue light pixels; S2, printing quantum dot ink on pixel points of the substrate, and forming a quantum dot ink layer under the protection of inert gas; and S3, preparing a light diffusion adhesive, coating the cured quantum dot ink layer with the light diffusion adhesive, and curing to form the light diffusion layer. Through ingenious application of the diffusion powder, the light diffusion layer covering the quantum dot film layer is formed, the obtained quantum dot composite film layer structure can be used in a display device like a QDCF/Microled or a QD-OLED to replace an existing quantum dot ink layer, the whole blue light absorption value (OD) is improved, and requirements of display fields such as an OLED/Microled or a QD-OLED are met.

Description

technical field [0001] The invention relates to the technical field of quantum dot display, in particular to a method for improving the absorption of blue light by an inkjet printing quantum dot layer. Background technique [0002] Quantum dot display technology has fully upgraded the existing display technology in various dimensions such as color gamut coverage, color control accuracy, and red, green, and blue color purity. It is regarded as the commanding height of global display technology and is also regarded as an influence A global revolution in display technology. The currently developed device technologies such as quantum dot color filter (QDCF), quantum dot microdisplay (QD microledDisplay) and quantum dot-organic electroluminescence (QD-OLED) are relatively cutting-edge ways to achieve high color rendering. . [0003] QDCF is to make quantum dots into a patterned film of red and green quantum dots with certain arrangement rules by inkjet printing, which replaces ...

Claims

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Application Information

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IPC IPC(8): H01L51/56H01L51/52H01L33/50
CPCH01L33/505H01L2933/0041H10K50/85H10K71/00
Inventor 张志坤李阳
Owner GUANGDONG POLY OPTOELECTRONICS
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