Novel supertwisted nematic liquid-crystal-display operating modes and electro-optical performance of generally twisted nematic configurations

摘要

Operation of generally twisted nematic liquid crystal displays (LCDs) in circularly instead of in conventional, linearly polarized operating modes is shown to allow the design of reflective supertwisted nematic (STN)-LCDs with 2-3 times improved multiplexibility and/or shorter response times. One single circular or linear polarizer and in-situ reflectors simplify and improve LCD projection systems. The optical thresholds of low bias tilt, generally twisted nematic LC configurations are shown to agree with their mechanical thresholds.