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:
Feb. 22, 2000
Filed:
Oct. 31, 1997
Applicant:
Inventors:
Georg Weber, Erzhausen, DE;
Harald Hirschmann, Darmstadt, DE;
Volker Reiffenrath, Rossdorf, DE;
Ursula Patwal, Rossdorf, DE;
Dagmar Zimmermann, Gross-Gerau, DE;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ; C09K / ; C09K / ;
U.S. Cl.
CPC ...
349182 ; 25229961 ; 25229963 ; 25229966 ; 25229967 ;
Abstract
The invention relates to TN liquid-crystal displays and supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependences, and to the novel nematic liquid-crystal mixtures used therein, which are distinguished by the fact that they comprise at least one compound o the formula IA ##STR1## and at least one compound of the formula IB ##STR2## in which R.sup.a, R.sup.b, R.sup.c, Ring A*, L, l and r are as defined in claim 1.