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. 05, 1994
Filed:
Apr. 12, 1993
Leonid A Beresnev, Moscow, SU;
Richard Buchecker, Zurich, CH;
Nina I Chernova, Moscow, SU;
Vladimir G Chigrinov, Moscow, SU;
Jurg Funfschilling, Basel, CH;
Marina V Loseva, Moscow, SU;
Yury P Panarin, Moscow, SU;
Fvgeniy P Pozhidaev, Moscow, SU;
Martin Schadt, Seltisberg, CH;
Hoffmann-La Roche Inc., Nutley, NJ (US);
Abstract
A bistable ferroelectric liquid crystal display cell utilizes two plates, a chiral ferroelectric smectic liquid crystal sandwiched between the plates, and an electrode for applying an electrical field to the plates. The chiral ferroelectric smectic liquid crystal has a structure which is influenced by the action of an electric field so that its optical anisotropy changes. By using a first polarizer connected to one of the plates and a second polarizer connected to the other plate, the unique bistable ferroelectric display produces dark parallel stripes when the polarizers are in a cross position relative to each other.