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:
Jan. 25, 1977
Filed:
Feb. 28, 1975
Isamu Washizuka, Kyoto, JA;
Hirohide Nakagawa, Sakurai, JA;
Sharp Kabushiki Kaisha, Osaka, JA;
Abstract
A general-purpose LSI (large-scale integrated circuit) computation circuit provides segment signals of high frequency at respective ones of its output terminals for displaying the computation results. It is necessary to provide a pulse frequency and pulse width converter in order to adapt the segment signals from the computation circuit to a form compatible with liquid crystal display units. There are provided flip-flops and normally closed switches for feeding the output signals of the flip-flops back to the input terminals of the flip-flops in order to temporarily maintain the segment signals within the converter. The input terminals of the flip-flops are connected with the respective ones of the output terminals of the computation circuit through normally open switches. The input terminals of the flip-flops are also connected with the respective segment electrodes of the liquid crystal display units. Synchronization between closing of the normally open switches and opening of the normally closed switches enables updating of the contents of the flip-flops, thereby achieving the reduction of the necessary number of terminals for the converter.