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. 19, 1996
Filed:
Aug. 17, 1993
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A liquid crystal display device is disclosed. The display device uses a phase transition type guest-host mode. The device is made with a pair of substrates (31, 45). One substrate is a transparent substrate and having a transparent electrode (47) and an aligning film (48) formed in this order. The other substrate is located opposite to the transparent substrate and has an insulating film (34), a reflection plate (38), and an aligning film (44) formed in this order. The reflection plate has projections (42a,b) at the surface. The aligning films are subjected to a vertical aligning treatment relative to the respective substrates. A liquid crystal composition is disposed between the aligning films, and has a nematic liquid crystal, a chiral additive and a two-tone pigment. A helical pitch (P.sub.o) of the liquid crystal composition and the cell thickness (d) of the liquid crystal display device satisfy the relation of 1.5<d/P.sub.o .gtoreq.4.