29.1: Unified Study of Twisted Nematic Reflective Modes for LCoS

Abstract

We present a unified study of the field-on and field-off states of NB and NW twisted nematic modes for reflective LCoS devices using an approximation called the uniform layer model. This model is used to determine the conditions to achieve reflective modes with both high brightness and high contrast ratio. By applying this model we discovered a new series of NB modes with thin cell gaps.

L-5: Late-News Paper: Small Digital 1080p LCOS for TrIM® Technology

“…The use of UV and a new vertically aligned normally black LC mode allows a small LC cell gap for very fast LC response 8 . While the transmissive image modulator needs to have high contrast, the LCOS only needs to achieve a contrast of ~300:1.…”