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. 17, 1981
Filed:
Jul. 25, 1979
Applicant:
Inventors:
Carla J Miner, Nepean, CA;
David R Baraff, Ottawa, CA;
Nur M Serinken, Kanata, CA;
Richard W Streater, Ottawa, CA;
Vladimir F Drobny, Ottawa, CA;
Assignee:
Northern Telecom Limited, Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
350334 ; 357-4 ; 357 76 ; 340719 ; 340784 ;
Abstract
A matrix multiplexed display cell has thin film switch devices at matrix crosspoints to provide a turn-on threshold for electrooptic liquid used in the cell. Each of the switch devices has two parallel branches of diodes, the diodes in one branch being of reverse polarity to those in the other. The cell is operated at low current so that the switch devices, which are deposited on glass, do not degrade rapidly in use.