P‐72: The Relation Between the Delay Time and the Gray Scale in Antiferroelectric Liquid Crystals

Abstract

Experimentally, the propagating fingers are observed distinctly under triangular AC pulse, but not under waveforms for gray scale such as SWBR (selection voltage-well bias reset) and SBR-AC (selection bias reset signal AC). Therefore, many researchers don't accept yet that the gray scale in AFLCs is obtained as a mixture of switched and unswitched areas. So, we have investigated the switching of AFLC under waveforms for gray scale by means of CCD camera pictures and electro-optic measurements. From our experiments, we have proved that the propagating fingers appear as the form of a delayed reponse time under waveforms for gray scale and the delay time makes possible to perform the gray scale under passive matrix driving in the high resolution condition which the selection pulse width is shorter than it's response time.