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:
Apr. 07, 2015
Filed:
May. 05, 2009
Applicants:
Robin Atkins, Vancouver, CA;
Vincent Kwong, Vancouver, CA;
Chun Chi Wan, Richmond, CA;
Inventors:
Assignee:
Dolby Laboratories Licensing Corporation, San Francisco, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/32 (2006.01); G09G 3/34 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
G09G 3/32 (2013.01); G09G 3/3413 (2013.01); H05B 33/0818 (2013.01); H05B 33/0857 (2013.01); H05B 33/0869 (2013.01); G09G 2320/041 (2013.01); G09G 2320/048 (2013.01); G09G 2320/064 (2013.01); G09G 2320/0666 (2013.01); G09G 2360/145 (2013.01);
Abstract
Chromaticity of light output by a light-emitting diode, such as a light-emitting diode (LED), is adjusted while maintaining a brightness of the illumination source substantially constant by adjusting a drive schema for the illumination source. A driver for LEDs or other light-emitting diodes provides for varying a drive schema to adjust chromaticity of driven LEDs.