Mura‐free G8.5 220ppi inkjet printing technology for OLED and QLED display panels
Hidehiro Yoshida, Shuhei Nakatani, Takashi Inoue, Yukiya Usui, Futoshi Ohtsuka
Abstract
Abstract This paper reported on the development of a Mura‐free and high precise printing to realize high‐resolution organic light‐emitting diode and quantum dot light‐emitting diode 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 to realize high precise printing, we developed the G8.5 table system that compensated for the drop position by changing the jetting time of each nozzle. And verified a drop position accuracy of ±2.1 μm. By combining these technologies, we achieved Mura‐free 220‐ppi printing on the G8.5 table.