Reflective Microdisplay Using Anti-Ferroelectric Liquid Crystals

We have characterized the MLC00089 AFLC mixture in terms of tilt angle, reflectance, and response time as a function of applied voltage. The derived highest contrast ration was about 700 to 1. We also applied the simulated TFT-type circuit to direct drive a hardwired Si-based chip filled with the AFLC mixture by varying the values of storage capacitor and gate on-time. We found that adding a storage capacitor is effective to increase the signal if the gate on-time of the TFT is shorter than the AFLC response time. We also used quasi-DC driving with a short gate on-time on the hardwired chip as well as a Si-based reflective SXGA microdisplay using 5-frame quasi-
DC driving with extrapolated polarity-frame inversion at 360 Hz suitable for field-sequential color displays using LED pulsed-light sources as well as optical storage applications.