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:
Feb. 20, 1990
Filed:
Mar. 30, 1988
Jean Dijon, Grenoble, FR;
Christine Ebel, Grenoble, FR;
Commissariat a l'Energie Atomique, Paris, FR;
Abstract
Bistable ferroelectric smectic liquid crystal display device. This device comprises a tight cell inserted between two polarizers formed from two glass walls, each provided with a display-appropriate electrode connected to an electric power supply for applying an electric field for controlling the liquid crystal to a chiral ferroelectric smectic liquid crystal film inserted between the electrodes. To obtain bistability and storage of the liquid crystal, one of the walls is covered with a material constituted by a stack of a silica layer, a polyimide layer, an optionally rubbed organosilane film in contact with the liquid crystal and the other wall is provided with a silica film covered with a Nylon film.