Mura-free G8.5 220ppi inkjet printing technology for OLED and QLED display panels

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.