Miniature OLED display screen and bright spot defect laser repairing method thereof

Abstract

The invention discloses a miniature OLED (Organic Light Emitting Diode) display screen and a bright spot defect laser repair method thereof, a metal doping mode is adopted as an auxiliary layer for laser repair, sub-pixels with bright spot defects in the miniature OLED display screen are scanned by pulse laser, and the bright spot defects in the miniature OLED display screen are repaired by controlling technological parameters such as laser energy. The doped active metal is diffused in the organic functional layer to form a controllable miniature short-circuit channel, and the cathode and the anode of the sub-pixel are short-circuited, so that the repaired sub-pixel does not emit light, and the bright spot defect in the screen is eliminated. According to the method, the whole pixel can be repaired only by processing any position in the pixel through laser, the high-resolution micro OLED display screen can be repaired, the repaired sub-pixel is completely extinguished, the process stability is high, and meanwhile the yield requirement and reliability of the micro OLED display screen are met.

Description

technical field [0001] The invention relates to the field of microelectronics and display technology, in particular to a micro OLED display screen and a laser repair method for bright spot defects. Background technique [0002] OLED, or Organic Light-Emitting Diode (OLED), is a new type of display device developed in the middle of the 20th century. OLED has many advantages such as ultra-thin, all-solid-state, active light-emitting, fast response, high contrast, no viewing angle limitation, wide operating temperature range, low power consumption, low cost, strong shock resistance and flexible display, and is known as " Dream Display". The superior performance and huge market potential of OLED displays have attracted many manufacturers and scientific research institutions all over the world to invest in the production and research and development of OLED devices. [0003] Due to the development of AMOLED (Active Matrix Organic Light Emitting Diode), large-size OLED displays ...

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Problems solved by technology

[0005] Technical purpose: Aiming at the OLED micro-display in the prior art to solve the defect that it is difficult to control the laser energy for the bright spot defect and the laser repair effect is poor, the present invention discloses a micro-OLED display and a laser repair method for the bright spot defect. As an auxiliary layer for laser repair, the laser only needs to process any point in the pixel to realize the repair of the entire pixel. It has a good effect on destroying bad pixels with bright spots, and at the same time does not affect the surrounding normal pixels at all, and has high process stability. sex

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