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. 21, 2006
Filed:
Sep. 24, 2002
Applicants:
Kurt A. Kuhlmann, San Jose, CA (US);
David M. Allen, Blachly, OR (US);
Inventors:
Kurt A. Kuhlmann, San Jose, CA (US);
David M. Allen, Blachly, OR (US);
Assignee:
Laughing Rabbit, Inc., Blachly, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/42 (2006.01);
U.S. Cl.
CPC ...
Abstract
A mirco-controller and boost converter circuit provide constant current to light emitting diode array. A micro-controller operatively coupled with a semiconductor switch and the boost converter circuit measure the ability of a DC power supply to change the inductor. Duty cycles of the semiconductor switch are modified according to the measurement so as to supply substantially constant current to the LED array through an inductor regardless of actual battery voltage.