Abstract
We present a normally black patterned electrically controlled birefringence [NB-PECB] mode with patterned electrode structure to improve the low contrast ratio of the general electrically controlled birefringence [ECB] mode and the gray inversion of twist nematic mode [TN]. The electrode structure used in the patterned vertical alignment [PVA] electro-optic mode is adopted in our proposed NB-PECB mode to produce two domains that are required for improving viewing angle uniformity. A λ/2 plate is also used to generate normally black state. Simulated results show the proposed mode can improve the gray inversion and the contrast ratio, compared with the two domain TN mode and the two domain ECB mode.
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