LIQUID CRYSTAL DISPLAY DEVICES

1507030 Liquid crystal compositions DEFENCE SECRETARY OF STATE FOR 15 Oct 1975 [21 Oct 1974]45495/74 Heading C4X [Also in Divisions G2 and G3] A liquid crystal composition consists of 5% by weight of cholesteryl nonanoate in a mixture containing 45% by weight of 4-pentyloxy-4'- cyanobiphenyl, 41% by weight of 4-heptyloxy-4'- cyanobiphenyl and 14% by weight of 4-pentyl-4"- cyano-p-terphenyl. The liquid crystal composition is mixed with a dye mixture containing Sudan Black, Sudan Red and #-carotene.