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:
Mar. 09, 2004
Filed:
Mar. 27, 2001
Applicant:
Inventor:
Kenneth R. Stafford, Ft Collins, CO (US);
Assignee:
Agilent Technologies, Inc., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 3/08 ; H01L 3/100 ;
U.S. Cl.
CPC ...
H02H 3/08 ; H01L 3/100 ;
Abstract
A bias circuit for preventing excessive emission from light emitting diodes includes a switch connected to power. A light emitting diode connects to the switch output. Two bias current legs, electrically connected in parallel, interpose the light emitting diode and ground. A fault comparator connects to the bias current legs and a logic OR gate. Four fault comparators can be implemented, each detecting a unique fault condition. The logic OR gate has an output connected to the input of the switch.
Stafford, Kenneth. (2004). Fault detection in a led bias circuit (U.S. Patent No. 6704183). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6704183
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile