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:
Sep. 10, 1991
Filed:
Jan. 28, 1991
Jun Nakanowatari, Miyagi, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A ferroelectric liquid crystal device, in which orientation is applied for either one of both or two substrates having transparent electrodes formed thereon for arranging the liquid crystal molecules in parallel with the substrate and a ferroelectric crystal is filled into the gap between two sheets of the substrates, wherein the ferroelectric liquid crystal has a helical texture pitch in the smectic phase not less than 1 um and not greater than 3.5 micrometers, while having a pitch in the cholesteric phase of not less than 25 micrometers. Also, the length of the gap between the substrates ranges from 6 to 13 micrometers. The light scattering type liquid crystal device capable of storing the state of display and displaying a large picture area at high contrast can be obtained.