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. 26, 1982
Filed:
Sep. 27, 1979
Applicant:
Inventors:
Hiroshi Ishida, Tokyo, JP;
Sunao Asahara, Hino, JP;
Assignee:
Fujitsu Fanuc Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
250553 ; 2502 / ;
Abstract
In an LED light source device for a pulse encoder, a plurality of LEDs are divided into a plurality of groups and each of said groups is included in one of the branches connected across the power source. At least one dummy LED or dummy diode is connected in series with the LED in a predetermined one of said branches, so that the voltage drop characteristics of said branches are equalized.
Ishida, Hiroshi. (1982). Led light source device for a pulse encoder (U.S. Patent No. 4313058). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4313058
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile