Liquid crystals for twisted nematic display devices

This article describes the use of nematic liquid crystals in the Twisted Ne matic Liquid Crystal Display (TN-LCD) since the large majority of instrumen ts manufactured currently incorporating a liquid crystal display (LCD) util ise this type of device. The correlation between the electro-optical perfor mance of these devices and the invention and synthesis of nematic liquid cr ystals with a continually improved property spectrum in order to meet const antly changing specifications is illustrated using the TN-LCD as an example of general trends and relationships.