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. 08, 1990
Filed:
Nov. 18, 1988
Shinichi Sawada, Ichiharashi, JP;
Toyoshiro Isoyama, Ichiharashi, JP;
Tetsuya Matsushita, Sodegauramachi, JP;
Hideo Saito, Ichiharashi, JP;
Chisso Corporation, , JP;
Abstract
A liquid crystal composition for twist nematic mode having improved reduction in threshold voltage and temperature dependency of the threshold voltage in a liquid crystal display element using the composition, and a liquid crystal display element are provided, which composition comprises a compound of the formula ##STR1## wherein R.sub.1 is 1-8C alkyl, R.sub.2 is F or CN and n is 1 or 2; or comprises the compound of the formula (I) as a first component and at least one member as a second component selected from compounds of the following formulas (II), (III) and (IV); ##STR2## wherein R.sub.3 is 1-8C alkyl and R.sub.4 is H or F, ##STR3## wherein R.sub.5 is 1-8C alkyl, R.sub.6 is 1-8C alkoxy or F, m is 1 or 2 and X is single bond or --COO--, and ##STR4## wherein R.sub.7 is 1-8C alkyl, R.sub.8 is 1-8C alkyl or alkoxy, F or CN and ##STR5##