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:
Nov. 09, 2010
Filed:
Jan. 31, 2007
Applicants:
Kenneth K. Smith, Boise, ID (US);
Craig T. Johnson, San Diego, CA (US);
Stuart Allman, San Diego, CA (US);
Inventors:
Kenneth K. Smith, Boise, ID (US);
Craig T. Johnson, San Diego, CA (US);
Stuart Allman, San Diego, CA (US);
Assignee:
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 1/04 (2006.01); B41J 2/415 (2006.01); B41J 2/385 (2006.01); H01J 41/00 (2006.01); G01J 1/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
An adaptive digital ramp current control system comprises a digital current ramp controller configured to digitally ramp a current level supplied to at least one light emitting diode (LED) according to a predetermined ramp profile, the ramp profile comprising at least one intermediate current level step between a minimum current level and a maximum current level.