J. Chen et al., 4-DOMAIN TWISTED NEMATIC LIQUID-CRYSTAL DISPLAY FABRICATED BY REVERSERUBBED POLYIMIDE PROCESS, Journal of applied physics, 80(4), 1996, pp. 1985-1990
In Appl. Phys. Lett. 67, 1990 (1995), we proposed a particularly simpl
e four-domain (4-D) twisted nematic(TN) liquid crystal display(LCD) de
vice, which is composed of two left-handed and two right-handed TN sub
pixels. The two members of each pair of same handedness subpixels are
rotated 180 degrees with respect to each other, resulting in four doma
ins that spatially average one another optically to provide a wide ang
le of viewing with no gray scale inversion. The optical performance of
the 4-D TN LCD was confirmed by studies of a test cell fabricated by
a two-step SiOx oblique evaporation technique. In this article, we rep
ort the realization of our four-domain TN display by a reverse rubbing
technique that should be suitable for mass production in the display
industry. The optical simulation of our 4-D TN cell was performed and
the effect of disclinations at subpixel boundaries on display contrast
investigated. A simple model was developed to evaluate the stability
of our 4-D structure. (C) 1996 American Institute of Physics.