80‐2: Distinguished Paper: Mura‐free G8.5 220ppi Inkjet Printing Technology for QLED and OLED Display Panels

• Published in: SID International Symposium Digest of technical papers Vol. 55; no. 1; pp. 1112 - 1115
• Main Authors: Yoshida, Hidehiro, Nakatani, Shuhei, Inoue, Takashi, Yukiya, Usui, Ohtsuka, Futoshi
• Format: Journal Article
• Language: English
• Published: Campbell Wiley Subscription Services, Inc 01.06.2024
• Subjects: Drive per nozzle; G8.5 inkjet equipment; Glass substrates; Inkjet printing; Line head; Mura‐free; OLED; One‐path printing; Panels; Pixel volume adjustment system; Pixels; QLED
• ISSN: 0097-966X; 2168-0159
• DOI: 10.1002/sdtp.17733

This paper reported on the development of a Mura‐free and high precise printing to realize high resolution QLED and OLED display panels with a G8.5 glass substrate. To realize Mura‐ free printing we developed the single‐path print line head and the new pixel volume adjustment system with a pixel volume variation of ±0.8%. And also, to realize high precise printing we developed the G8.5 table system that compensated for the drop position by changing the ejecting time of each nozzle. And verified a drop position accuracy of ±2.1μm. By combining these technologies, we achieved Mura‐free 220ppi printing on the G8.5 table.