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Preparation method for Micro LED display device

A display device, one-to-one correspondence technology, applied in the direction of electric solid device, semiconductor device, electrical components, etc., can solve the problems of poor uniformity of quantum dots, lower yield and display quality, large pixel size, etc., to improve the uniformity of light output. performance, avoid mutual influence, and reduce the cost of equipment

Inactive Publication Date: 2017-09-15
SHENZHEN SITAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems in the technology of directly coating quantum dots: (1) Since the surface of Micro LEDs is not flat and uniform after processing, it is difficult to directly coat quantum dots on Micro LEDs, and it is difficult to achieve the accuracy or uniformity of the coating film, which reduces the yield and display quality. (2) Due to the large size of the nozzle in the spraying equipment, the size of the coated pixel point is too large, it is difficult to achieve high-density coating or high-resolution display of quantum dots; (3) the uniformity of the coated quantum dots is poor, and when spraying There will be more defects, and at the same time, the colors of quantum dots of various colors will affect each other, making the coloring quality significantly reduced

Method used

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  • Preparation method for Micro LED display device
  • Preparation method for Micro LED display device
  • Preparation method for Micro LED display device

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The following steps are used to prepare the Micro LED display device:

[0041] (1) Prepare an array of Micro LED chips 2 on the substrate 1, and the structure of the Micro LED chip array is as follows figure 1 shown;

[0042] (2) according to figure 2 The schematic flow chart for preparing the red quantum dot material layer is shown, and a layer of red quantum dot material is prepared on the Micro LED chip 2 array. Technical preparation of transfer template one 3, the prepared transfer template one 3 has a Micro LED chip located in row 2i-1, column 2j-1 (i,j=1,2,3...n) of the Micro LED chip array 2 corresponds to the protrusion 4 pattern, the length of the protrusion 4 is 1.1 times the length of the chip 2, the width is 1.1 times the width of the chip 2, and the height is 2.1 times the height of the chip 2. The length and width of the protrusion are slightly larger than the length and width of the Micro LED chip, which can effectively reduce the blue light leakage o...

Embodiment 2

[0047] The following steps are used to prepare the Micro LED display device:

[0048] (1) Prepare a Micro LED chip 2 array on the substrate 1, the chip array is the same as in Example 1;

[0049] (2) according to Figure 6 The schematic flow chart for preparing the red quantum dot material layer is shown, and a layer of red quantum dot material is prepared on the Micro LED chip 2 array. Preparation of transfer template 3 8 by photolithography, the prepared transfer template 3 8 has an array of Micro LED chips 2 located at row 2i-1, column 2j-1 and row 2i, column 2j (i,j=1,2 , 3...n) Micro LED chip 2 corresponding to the bump 4 pattern, the length of the bump 4 is 1.3 times the length of the chip 2, the width is 1.1 times the width of the chip 2, and the height is 0.9 times the chip 2 The thickness of the transfer template has a raised pattern dipped in the quantum dot material 9, the quantum dot material is an aqueous solution of red quantum dots, the transfer template 3 8 i...

Embodiment 3

[0052] The following steps are used to prepare the Micro LED display device:

[0053] (1) Prepare a Micro LED chip 2 array on the substrate 1, the chip array is the same as in Example 1;

[0054] (2) according to Figure 8 The schematic flow chart for preparing the quantum dot material layer is shown, and a layer of quantum dot material is prepared on the Micro LED chip 2 array: Preparation of transfer template 5 12: Select PDMS as the transfer template material, and use nanoimprint technology to prepare the transfer template. Printing template 5 12, the prepared transfer printing template 5 12 has a pattern of depressions 13 corresponding to all the Micro LED chips 2 in the array of Micro LED chips 2, the length of the depression 13 is 1.1 times the length of the chip 2, and the width is 1.1 times the length of the chip 2 The width is 1 times the thickness of the chip 2 deep. The length and width of the depression are slightly larger than the length and width of the Micro L...

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Abstract

The invention discloses a preparation method for a Micro LED display device. A Micro LED chip array is coated with quantum dot materials by adopting a template transferring mode; the used quantum dots are relatively small in grain diameters, so that light output uniformity can be effectively improved; different quantum dot materials are printed to different concave positions of transferring templates in a dislocation manner by adopting the transferring templates with concave patterns, so that synchronous transferring of different quantum dot materials can be realized; meanwhile, mutual influence between different quantum dots can be avoided; sequential transferring of different quantum dot materials is realized by adopting multiple transferring templates through dislocation transferring in multiple times, so that mutual influence between different quantum dots can be avoided effectively, and high-resolution colorized display quality is improved; and meanwhile, the transferring time is short, so that large-scale and quick production can be realized easily.

Description

technical field [0001] The invention relates to a preparation method of a Micro LED display device. Background technique [0002] Micro LED is a miniaturized LED array structure with self-luminous display characteristics. Its technical advantages include all solid state, long life, high brightness, low power consumption, small size, ultra-high resolution, and can be applied to extreme environments such as high temperature or radiation. . Compared with OLED technology, which is also a self-luminous display, Micro LED not only has higher efficiency and longer life, the material is not easily affected by the environment and is relatively stable, and can also avoid image sticking. [0003] At present, the display mode of Micro LED is usually monochrome display, and the colorization of Micro LED display is the key technology for further expanding its application. The RGB three-color LED method is one of the important technical directions for realizing colorization. The RGB thre...

Claims

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Application Information

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IPC IPC(8): H01L33/50H01L27/15
CPCH01L27/156H01L33/502H01L33/504H01L2933/0041
Inventor 孙小卫王恺刘召军王立铎郝俊杰刘皓宸
Owner SHENZHEN SITAN TECH CO LTD
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