A full-color μled display device without electrical contact and mass transfer

Abstract

The invention relates to a full-color μ LED display device without electrical contact and mass transfer. It includes a lower driving electrode arranged on the surface of the lower transparent substrate, an optical microstructure and an upper driving electrode arranged on the upper and lower surfaces of the upper transparent substrate, a barrier microstructure connecting the upper and lower transparent substrates, and a μLED in the barrier microstructure Crystal grains, wavelength down-converting light-emitting layer and insulating layer, and control module; the microstructure of barrier ribs along the direction of the upper driving electrode sequentially constitute the R unit for red light display, the G unit for green light display and the B unit for blue light display. In the present invention, the upper and lower driving electrodes are not in electrical contact with the μLED grains, and the control module provides alternating driving signals and electrical coupling to realize the lighting of the μLED grains, and the excitation wavelength down-converts the light-emitting layer to realize full-color display, which can effectively Avoid the complex manufacturing process of the three-color μLED chip in the full-color μLED device, as well as the complex bonding and mass transfer process of the light-emitting chip and the driver chip, shorten the μLED display production cycle, and reduce the production cost.

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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