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:
Jul. 07, 2009
Filed:
Dec. 15, 2006
Applicants:
Robert Elsheimer, Fort Collins, CO (US);
Robert M. Thelen, Fort Collins, CO (US);
Inventors:
Robert Elsheimer, Fort Collins, CO (US);
Robert M. Thelen, Fort Collins, CO (US);
Assignee:
Avago Technologies ECBU IP (Singapore) Pte. Ltd., Singapore, SG;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J 1/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A driver circuit for driving a light source of an optical pointing device includes a first transistor coupled to the light source. The driver circuit includes a controller coupled to the first transistor for monitoring a first current through the light source, comparing the first current to a reference current, and generating a control signal based on a result of the comparison, wherein the control signal causes the first transistor to change the first current.