A quantum dot display device and its manufacturing method

Abstract

The invention provides a quantum dot display device and a manufacturing method thereof. The quantum dot display device includes an array substrate, a retaining wall, an anode cathode, a green sub-pixel unit made of a green photoluminescence quantum dot material, and a red photoluminescence quantum dot unit. The red sub-pixel unit made of dot material and the blue sub-pixel unit made of blue electroluminescence quantum dot material. In the present invention, the blue electroluminescent quantum dot material is used in combination with the green photoluminescent quantum dot material and the red photoluminescent quantum dot material, and the green light and the blue light are irradiated with high energy for a long time through the mask to make the red light The luminescent quantum dot material and the green photoluminescent quantum dot material are irreversibly quenched to obtain red, green and blue sub-pixel units, and a high-resolution quantum dot layer patterned structure can be realized without the etching process, without the need to purchase expensive High-resolution inkjet printing equipment greatly reduces production costs.

Description

technical field [0001] The invention relates to the technical field of display device manufacturing, in particular to a quantum dot display device and a manufacturing method thereof. Background technique [0002] At present, quantum dot display devices mainly have two modes: one is photoluminescence; the other is electroluminescence. Photoluminescence mainly uses red and green quantum dots to absorb ultraviolet light or blue light and then converts them into red and green light, so it is also called light conversion; while electroluminescence is like OLED, which uses electrons and holes to combine , emitting light of the corresponding energy wavelength. [0003] When the red, green and blue sub-pixels of existing quantum dot display devices are produced, inkjet printing technology is generally used. Since the pixel size of the display screen is generally on the order of microns, the higher the resolution, the smaller the droplet volume and the more accurate the positioning....

AI Technical Summary

Problems solved by technology

[0003] When the red, green and blue sub-pixels of existing quantum dot display devices are produced, inkjet printing technology is generally used. Since the pixel size of the display screen is generally on the order of microns, the higher the resolution, the smaller the droplet volume and the more accurate the positioning. Limited by inkjet printing of R, G, and B sub-pixels, it is easy to affect the resolution that the printing process can achieve due to droplet positioning deviation, movement accuracy, and even environmental factors.

At present, the mass-produced printing resolution is limited to about 200-300ppi, which is far from enough compared to the high resolution of 500ppi in current mobile applications.

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