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:
Dec. 08, 2015
Filed:
May. 30, 2012
Applicants:
Haimin Tao, Eindhoven, NL;
Henricus Marius Joseph Maria Kahlman, Dongen, NL;
Pieter Gerrit Blanken, Nuenen, NL;
Ralph Kurt, Eindhoven, NL;
Inventors:
Haimin Tao, Eindhoven, NL;
Henricus Marius Joseph Maria Kahlman, Dongen, NL;
Pieter Gerrit Blanken, Nuenen, NL;
Ralph Kurt, Eindhoven, NL;
Assignee:
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/00 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0845 (2013.01); H05B 33/083 (2013.01); H05B 33/0812 (2013.01); H05B 33/0815 (2013.01); Y02B 20/347 (2013.01); Y02B 20/348 (2013.01);
Abstract
A string of LED loads is supplied by means of a rectified mains voltage. A cathode of each LED load is coupled to ground by means of a string. The strings are made conductive and non-conductive one by one in dependency of the instantaneous value of the rectified mains using both voltage and current sensing.