Influence of Ball Spacer Size and Density on Liquid Crystal Margin of In-Plane Switching Panel Fabricated by the Inkjet Process

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In this paper, we investigated the influence of ball spacer size and density on liquid crystal (LC) margin of in-plane switching (IPS) panel fabricated by the inkjet process. In the case of using 3.0 μm ball spacer alone, LC margin is decreased rapidly with increasing the ball spacer density. Also, the good condition is not achieved, even though we adjust the ball spacer density for the several conditions. However, it is possible to get LC margin of 8.7% and the push strength of 6.0 kgf by mixing ball spacers of 2.75 μm and 3.0 μm. In condition with 100 number/mm2 of 3.0 μm, we achieved higher LC margin without the decrease of the push strength by increasing the ball spacer of 2.75 μm.
2010-05-25