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. 30, 1979
Filed:
May. 19, 1976
Fumiaki Mukaiyama, Suwa, JP;
Kabushiki Kaisha Suwa Seikosha, Tokyo, JP;
Abstract
An improved digital display driving circuit for driving digital display cells forming a ditigal display is provided. The driving circuit includes an interfacing circuit that in response to being energized receives a first data signal for selectively energizing certain of the display cells and a second drive signal for effecting AC driving of the display cells selectively energized by the data signal. The improved driving circuit is characterized by a DC supply coupled to the interfacing circuit, the AC supply being adapted to energize the interfacing circuit, and a detecting circuit coupled intermediate the DC supply and the interfacing circuit for selectively controlling the energizing of the interfacing circuit by the DC supply in response to the presence or absence of the drive signal being applied to the interfacing circuit to thereby prevent DC driving of the display cells.