Piezoelectric control system and piezoelectric control optimization method for printing OLED device

Abstract

The invention discloses a piezoelectric control system and piezoelectric control optimization method for printing an OLED device. The system controls a main pixel ink droplet injection system to inject an organic material through an upper computer so as to print and form an organic light-emitting layer on the surface of an OLED substrate; meanwhile, a vacant pixel monitoring system collects pixel group images of the OLED substrate in the printing process in real time, and sends the pixel group images to the upper computer; and the upper computer finds out vacant pixel points in the images and corresponding positions of the vacant pixel points in the OLED substrate, and controls a vacant pixel compensation system to carry out filling printing on the corresponding positions of the vacant pixel points in the OLED substrate so as to eliminate defects in the organic light-emitting layer and achieve the purpose of optimizing the OLED manufacturing process. The problem of low device yield caused by a small number of vacant pixels in the OLED printing process is avoided, the process stability of OLED printing can be effectively improved, and the progress of replacing the evaporation technology with the OLED printing technology is further promoted.

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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