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:
Apr. 22, 2003
Filed:
Oct. 12, 2000
Applicant:
Inventor:
Yasushi Kaneko, Sayama, JP;
Assignee:
Citizen Watch Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/1335 ; G02F 1/1336 ;
U.S. Cl.
CPC ...
G02F 1/1335 ; G02F 1/1336 ;
Abstract
A reflection-type liquid crystal display device of single polarizing film type, comprises a liquid crystal element ( ) comprised of twisted nematic liquid crystal ( ) sandwiched between a first substrate ( ) provided with a reflector ( ) and first electrodes ( ), and a second substrate ( ) provided with second electrodes ( ), and a twisted retardation film ( ), a first retardation film ( ), a second retardation film ( ), a polarizing film ( ) that are disposed in sequence on the outer side of the second substrate ( ), so that black display having a low reflectance is obtained over the all-wavelength region, thereby effecting bright display in high contrast.