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:
Jul. 31, 1990
Filed:
Oct. 14, 1988
Tetsushi Yoshida, Tokyo, JP;
Ken Kozima, Tokyo, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A liquid crystal display device of this invention includes a pair of opposing substrates, a plurality of electrodes arranged on the inner surfaces of the pair of opposing substrates so as to oppose each other, aligning films formed on the inner surfaces of the pair of substrates on which the plurality of electrodes are formed, a nematic liquid crystal sealed between the pair of opposing substrates, and a pair of polarizing plates arranged to sandwich the nematic liquid crystal. The nematic liquid crystal has a value of dielectric ratio .DELTA..epsilon./.epsilon..sub..perp. of 0.5 or less, a value of elastic constant ratio K.sub.33 /K.sub.11 of 0.8 or less, and values of liquid crystal layer thickness d and optical anisotropy .DELTA.n with which a value of product .DELTA.n.multidot.d of the liquid crystal layer thickness d and optical anisotropy .DELTA.n becomes 0.5 (.mu.m) or more and 0.7 (.mu.m) or less.