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:
Mar. 04, 1980
Filed:
Sep. 16, 1977
Jacques Robert, Saint-Egreve, FR;
Commissariat a l'Energie Atomique, Paris, FR;
Abstract
A liquid crystal film placed between plate electrodes and point electrodes can have a first optical state 1 if the electrical excitation applied between the plate and point electrodes is higher than a threshold value V.sub.s and a second optical state 0 of this excitation is lower than the threshold value. A set of P voltages is applied to the P point connections of the device and a second set of S voltages is applied simultaneously to the S sector connections. In a boundary sector, some points of the liquid crystal are thus in state 1 while other points are in state 0. In the case of each of the other sectors, the points of any one sector are all in one of the two states 1 or 0.