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:
Jun. 29, 1993
Filed:
Feb. 28, 1991
Dora Plus, South Bound Brook, NJ (US);
Antoine P DuPont, Villingen, DE;
Thomson. S.A., Courbevoie, FR;
Abstract
A display device having a plurality of select lines includes redundant select line scanners. Each scanner includes a plurality of substantially identical stages having an input terminal and an output terminal. The stages and select lines are ordinally numbered and correspondingly numbered stages are connected to opposite ends of the correspondingly numbered select lines by separate line segments. The stages within each scanner are cascaded by connecting the output terminal of each stage to the input terminal of the immediately succeeding stage. The select line scanners are independently operable by the provision separate power supplies and clock generators. During testing, one scanner is made to look like a high impedance to the scanner being tested. Failed stages of a scanner are replaced by the correspondingly numbered stage of the other scanner simply by opening the separate line segment of the failed stage.