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:
Oct. 09, 1990
Filed:
Mar. 24, 1988
Applicant:
Inventors:
Hideo Hirane, Hitachi, JP;
Kiyohiko Tanno, Katsuta, JP;
Kentaro Yagi, Ichikawa, JP;
Hisao Iitsuka, Hitachi, JP;
Assignees:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340782 ; 340762 ; 340767 ; 3461 / ;
Abstract
A driving circuit for a light emitting diode array, which is divided into a plurality of drivers for every driving output and so constructed that the control of the sum of the currents flowing therethrough is set by selecting one or a plurality of the divided drivers by using digital signals '1' and '0'.