Full-color muLED display device without electrical contact and mass transfer

Abstract

The invention relates to a full-color muLED display device without electrical contact and mass transfer. The device comprises a lower driving electrode arranged on a surface of a lower transparent substrate, an optical microstructure, an upper driving electrode, a barrier microstructure, muLED crystal grains, a wavelength down-conversion light-emitting layer, an insulating layer and a control module, wherein the optical microstructure and the upper driving electrode are arranged on an upper surface and a lower surface of an upper transparent substrate; the barrier microstructure is connected with the upper transparent substrate and the lower transparent substrate; and the muLED crystal grains, the wavelength down-conversion light-emitting layer, the insulating layer and the control moduleare arranged in the barrier microstructure. And the barrier microstructure successively forms an R unit for red light display, a G unit for green light display and a B unit for blue light display along a direction of the upper driving electrode. In the invention, the upper driving electrode and the lower driving electrode are not in electrical contact with the muLED crystal grains. An alternatingdriving signal and electrical coupling are provided through the control module to lighten the muLED crystal grains. Full-color display is realized by exciting the wavelength down-conversion light-emitting layer so that a complex manufacturing process of a three-primary-color muLED chip in a full-color muLED device and a complex Bonding and mass transfer process of a light-emitting chip and a driving chip can be effectively avoided, a muLED display manufacturing period is shortened, and manufacturing cost is reduced.

Description

technical field [0001] The invention relates to the field of integrated semiconductor display, in particular to a full-color μLED display device without electrical contact and mass transfer. Background technique [0002] In the field of flat panel display technology, micron-scale LED display (referred to as μLED display) refers to the miniaturization of traditional LEDs to form micron-scale pitch LED arrays to achieve ultra-high-density pixel resolution. μLED display has self-luminous characteristics. Compared with OLED and LCD displays, μLED display has low power consumption, high brightness, ultra-high definition, high color saturation, faster response speed, longer service life and higher working efficiency. Efficiency, etc.; In addition, μLED display is the only display device that can integrate drive, light emission, and signal transmission with high luminous efficiency and low power consumption, and realize ultra-large-scale integrated light-emitting units. Due to high...

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Problems solved by technology

Chinese patents CN106356386A, CN108257949A, and CN109256455A realize full-color display by filling red quantum dots and green quantum dot units in blue μLED chips, but blue μLED chips need to make cathodes and anodes, and quantum dots also need to be patterned. After the mass transfer, the blue μLED chip can be driven to emit light only after it is in contact with the driving electrode chip, so as to realize full-color display, resulting in longer production cycle and high production cost of μLED devices

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