Title :
Improved contrast uniformity in twisted nematic liquid-crystal electro-optic display devices
Author_Institution :
Royal Radar Establishment, Malvern, UK
Abstract :
It has already been shown that one source of the patched appearance in twisted nematic displays is reverse twist; we now demonstrate the existence of another. Both types of patches have been eliminated by the use of cholesteric additives in combination with particular types of surface alignment.
Keywords :
display systems; liquid crystal devices; display systems; electrooptic display devices; liquid crystal devices;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19740108
