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:
Mar. 17, 2015
Filed:
Mar. 08, 2013
Applicant:
LT Lighting (Taiwan) Corp., Xiangshan Dist., Hsinchu, TW;
Inventors:
Assignee:
LT Lighting (Taiwan) Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/02 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
H05B 37/02 (2013.01); H05B 33/0824 (2013.01);
Abstract
A demand-side dimmable LED lamp operable on a direct current power source that powers a lighting subsystem. The dimming unit selects a power consumption level of the lighting system. Such selection changes the efficacy of the lighting subsystem such that a reduction in power consumption actually results in improved efficacy. The selecting might, for example, select a particular passive network that includes LEDs within the lighting subsystem. Each passive network may have different I-V characteristics, and result in different L-P characteristics, thereby effecting the improved efficacy at lower powers.