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Extensible passive addressing LED micro-display device

A micro-display device, an extended technology, applied in the direction of electric solid-state devices, semiconductor devices, static indicators, etc., can solve the problems of complex process of CMOS active addressing drive substrate, difficulty in preparing large-scale arrays, and high cost. Achieve the effects of cheap price, simple preparation process and guaranteed stability

Active Publication Date: 2016-08-31
SUN YAT SEN UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the CMOS active addressing and driving substrate process is extremely complicated and the cost is high, so it is difficult to prepare a large-scale array

Method used

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  • Extensible passive addressing LED micro-display device

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Embodiment Construction

[0028] The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as a limitation on this patent.

[0029] Choose a blue-violet band LED epitaxial wafer with uniform growth performance, with a sapphire substrate, n-GaN layer 1, GaN-based multiple quantum well layer 2, p-GaN layer 3, and form ZnO or ITO thin film with a thickness of 200nm-500nm. Then use photoresist coating, the thickness is between 2um-3um. The pixels are formed by photolithography, ICP etching and other steps. Th...

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Abstract

The invention discloses the technical scheme of the structure of an extensible passive addressing LED micro-display device and preparation thereof. The LED micro-display device comprises an LED micro-pixel array and a passive addressing silicon-based driving substrate. Interconnection of the n electrodes of row LED pixel points is realized in the LED array. Interconnection of the P electrodes of column LED pixel points is realized on the silicon-based substrate. Then bonding of the LED array and the silicon-based substrate is realized through the mode of flip-chip welding. Besides, all-band visible light secondary radiation material is coated on the transparent electrodes of the LED pixel points, and red, green and blue alignment distributed pixel point color filters are applied for covering or monochrome secondary radiation material is applied for alignment distributed coating. Blue-violet light radiation is acquired through row and column scanning and addressing of power supply micro LED pixel points, all-band visible light is acquired by stimulating the secondary radiation material, and three primary colors are acquired through the color filters or the three primary colors are acquired by directly stimulating the monochrome secondary radiation material so that the objective of micro-display can be achieved. The micro-display device prepared by the method can achieve the advantages of micro device, low-voltage and low-current driving, color display and long service life.

Description

technical field [0001] The invention relates to the technical field of flat panel display, in particular to an expandable passive addressable LED micro-display device. Background technique [0002] Display technology is an indispensable companion in the process of human modernization. It is a display tool that displays certain electronic files on the screen through a specific transmission device and then reflects them to the human eye. It has experienced the evolution of electron gun display, liquid crystal display, plasma display, OLED display, LED display and other processes. At the same time, it has also evolved from a low effective display area, energy consumption, and unsafe form to a light, large effective area, energy-saving and environmentally friendly form. [0003] At present, the existing LED micro-displays are mainly divided into two types: passive addressing type and active addressing type. [0004] Passive addressing is to etch the deep trench to the sapphire ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L23/52H01L27/15H01L33/38G09G3/32
CPCH01L23/52H01L27/156H01L33/387G09G3/32
Inventor 滕东东王钢刘立林杨浩吴明洋
Owner SUN YAT SEN UNIV
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