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. 19, 2016
Filed:
Mar. 03, 2011
Applicants:
Berend Jan Willem Ter Weeme, Eindhoven, NL;
William Peter Mechtildis Marie Jans, Eindhoven, NL;
Inventors:
Berend Jan Willem Ter Weeme, Eindhoven, NL;
William Peter Mechtildis Marie Jans, Eindhoven, NL;
Assignee:
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 23/02 (2006.01); H05B 37/02 (2006.01); F21V 21/00 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
F21V 21/00 (2013.01); H05B 33/08 (2013.01); H05B 33/0821 (2013.01); H05B 33/0857 (2013.01); Y10T 29/49117 (2015.01);
Abstract
A lighting device has a plurality of LEDs of at least two types connected in series. At least one of the LEDs of the first type and LEDs of the second type is connected in parallel to a resistor assembly, such that the temperature-dependent resistance of the resistor assembly stabilizes a ratio of luminous flux output at different junction temperatures of the LEDs.