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:
Dec. 30, 1986
Filed:
Dec. 05, 1983
Fukuo Sekiya, Tokorozawa, JP;
Citizen Watch Company Limited, Tokyo, JP;
Abstract
A row conductor drive circuit for a matrix display device, to be formed directly upon one substrate of a display panel, is divided into a number of circuit sections connected in series each comprising at least two shift registers. Only one shift register in a circuit section is made operable to produce row conductor scanning signals, the operable shift register being selected based on testing performed after manufacture and with shift registers being selectively set in the operable or non-operable states by potentials applied to control terminals provided in the circuit sections. A set of properly operating shift registers are thereby effectively connected in series to produce row conductor scanning signals even if some shift registers of the circuit sections are defective. Manufacturing yield of the display device is thereby substantially increased.