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:
Nov. 12, 2013
Filed:
Sep. 01, 2008
Teru Shimada, Chiba, JP;
Masahide Kobayashi, Chiba, JP;
Teru Shimada, Chiba, JP;
Masahide Kobayashi, Chiba, JP;
JNC Corporation, Tokyo, JP;
JNC Petrochemical Corporation, Tokyo, JP;
Abstract
The invention provides a liquid crystal compound having stability to heat, light and so forth, a wide temperature range of a nematic phase, a small viscosity, a suitable optical anisotropy, a suitable elastic constant K, a suitable and negative dielectric anisotropy, and an excellent compatibility with other liquid crystal compounds. The invention provides a liquid crystal composition containing the compound described above and having stability to heat, light and so forth, a small viscosity, a suitable optical anisotropy, a suitable and negative dielectric anisotropy, a suitable elastic constant K, a low threshold voltage, a high maximum temperature of a nematic phase, and a low minimum temperature of the nematic phase. The invention also provides a liquid crystal display device having a short response time, a small power consumption, a low driving voltage, and a large contrast, and containing the composition described above which can be used in a large temperature range. For example, a liquid crystal compound having four or more rings in which the central ring has 2,3-difluorophenoxy such as trans-4'-[2,3-difluoro-4-(trans-4-propylcyclohexyl)phenoxymethyl]-trans-4-pentylbicyclohexyl is provided. Further provided is a liquid crystal composition containing the compound, and a liquid crystal display device using this liquid crystal composition.