Δε <0のN* LCを用いたねじれ配向双安定LCDにおける固有ピッチの検討

概要

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Novel type of bistable LCD by using the N* LC material with Δε <0 is investigated. There is a possibility that anoptical high contrast ratio is obtained, because the pure black image can be easily obtained by using the vertical alignmentstate. Display holding time and the d/P0 ratio to induce the bistable states are important parameters for the bistableLCD. In this paper, the observation and the evaluation of the display in the wedge shaped cell were carried out toachieve the improvement of display holding time when the cell thickness d and d/p ratio were varied. As a result, theregion of d/P0 for obtaining the bistable state was extended within d/P0=0.52〜0.84 (Δ [d/P0]=0.32) in the cell with P0=12.48μm, however, d/P0=0.68〜0.94 (Δ [d/P0]=0.26) in the cell with P0=7.21μm.
2012-10-30