Selection and Optimizing of Liquid Crystal Display Modes for the Full Color Active-matrix LCDs

Abstract

We have investigated several liquid crystal display modes from the viewpoint of several display performance characteristics for the application to full color a-Si TFT active matrix LCDs. As the results, the Normally White configuration type TN mode has the best full color display for high contrast ratio and small color shift with changing viewing angle.
Decreasing saturation voltage and improving viewing angle characteristics are residual problems.
A new improved liquid crystal mixture was developed which has relativery large εa, K₃₃/ K₁₁ & K₃₃/ K₂₂ and small K₁₁ & Δn. This mixture has been applied to full color a-Si TFT-LCD which has high contrast ratio (more than 100 : 1) and wide viewing angle (Up-Down 65°, Right-Left 80°, more than 10 : 1 contrast ratio).