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:
Nov. 15, 1988
Filed:
Nov. 24, 1986
Fukuo Sekiya, Tokorozawa, JP;
Citizen Watch Company Limited, Tokyo, JP;
Abstract
A drive circuit for producing scanning pulses to successively select row or column conductors of a matrix display device of the type having an active element provided for each display element in the matrix, the drive circuit comprising a shift register made up of a set of cascade-connected master-slave flip-flops, with both the master outputs and the 'slave' outputs being utilized to form the scanning pulses. The number of flip-flop stages required is reduced by 1/2, by comparison with prior art drive circuits using master-slave flip-flops, and the frequency of the clock pulse signal required to drive the shift register is 1/2 of that required in the case of a prior art circuit.