The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 1986
Filed:
Aug. 29, 1979
Hitachi, Ltd., Tokyo, JP;
Abstract
A nematic liquid crystal composition comprising (a) at least one compound of the formula: ##STR1## wherein R.sub.1 is n--C.sub.m H.sub.2m+1, n--C.sub.m H.sub.2m+1 --O or n--C.sub.m H.sub.2m+1 --CO; R.sub.2 is n--C.sub.q H.sub.2q+1, n--C.sub.q H.sub.2q+1 --O or n--C.sub.q H.sub.2q+1 --CO; m and q are each an integer of 1 to 10 and n is a symbol indicating that carbons are linked linearly, and (b) at least one compound of the formula: ##STR2## wherein R.sub.3 is n--C.sub.r H.sub.2r+1 or n--C.sub.r H.sub.2r+1 --O; R.sub.4 is n--C.sub.s H.sub.2s+1 or n--C.sub.s H.sub.2s+1 --O; r and s are each an integer of 1 to 10 and n is as defined above, and where necessary (c) at least one nematic liquid crystal compound having positive dielectric anisotropy and/or its homologous compound, and if necessary (d) at least one nematic liquid crystal compound having negative dielectric anisotropy and/or its homologous compound. This liquid crystal composition, when used for a display device, shows excellent properties in that it is oriented with high stability over a wide temperature range, allows wide-range setting of threshold voltage and is small in temperature dependency and quick to respond to the applied voltage.