A piezoelectric control system and optimization method for printing oled devices

Abstract

The invention discloses a piezoelectric control system and optimization method for printing OLED devices. The system controls the main pixel ink drop ejection system to spray organic materials through a host computer to print and form an organic light-emitting layer on the surface of an OLED substrate. At the same time, the vacancies The pixel monitoring system collects the pixel group image of the OLED substrate in the printing process in real time, and sends the pixel group image to the host computer; the host computer finds out the vacancy pixels in the image and the corresponding positions of the vacancy pixels in the OLED substrate, and controls the vacancy The pixel compensation system fills and prints the corresponding positions of vacant pixels in the OLED substrate to eliminate defects in the organic light-emitting layer, achieve the purpose of optimizing the printing OLED process, and avoid the low yield rate of devices caused by a small number of vacant pixels in the process of printing OLEDs The problem can effectively improve the process stability of printed OLED, and further promote the progress of printed OLED technology instead of evaporation technology.

Description

technical field [0001] The invention relates to the technical field of printed electronics, in particular to a piezoelectric control system and optimization method for printing OLED devices. Background technique [0002] Nowadays, the display technology is updated very fast, and OLED technology has become a hot spot in the industry. However, due to the immaturity and instability of the manufacturing process, the cost of OLED-related products is too high and the output is insufficient, resulting in a large panel gap. Meet the needs of the market. At present, there are two main production processes for OLED panels: evaporation and inkjet printing, among which evaporation is the main method for OLED panel preparation. When the organic light-emitting layer is manufactured by evaporation technology, a vacuum device is needed. The solid organic raw material is added to the device, and then vaporized by heating, and then re-condensed at the designated substrate position to form th...

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Problems solved by technology

[0005] The first purpose of the present invention is to solve the problem of interruption of ink droplet ejection due to some inkjet head failures in the process of inkjet printing OLEDs, and finally form vacant pixels on the OLED substrate, and propose a piezoelectric device for printing OLED devices. The control system can quickly obtain defective pixels in the spraying process in real time, and accurately judge their quantity and precise positioning, and then automatically fill the defects through the vacant pixel compensation system, avoiding the low yield rate of devices caused by a small number of vacant pixels during the printing OLED process It can effectively improve the process stability of the current printed OLED, and further promote the progress of printing OLED technology to replace evaporation technology.

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