Study of Improvement of Scan Mura in In-Plane Switching Panel Fabricated by the Inkjet Spacer Process

概要

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In this paper, we have investigated the scan mura due to the difference of spacer position in each nozzle of inkjet heads for inkjet spacer process. It was found that the difference of the cell gap was about 0.051 μm between a bright area and a dark area in panel with strong scan mura. The difference of the cell gap means the subtracted value of the cell gap in the dark area from the cell gap in the bright area. In the case of adjusting of dropped ink velocity on each nozzle, the scan mura is improved, but is not perfect. On the other hand, the scan mura is drastically improved by the randomization of spacer position using nozzle mixing method (NMM), where the difference of cell gap is only 0.009 μm. It is considered that the scan mura is strongly influenced by ink dropped position, the inkjet process.
2010-05-25