Patent · US Active

LED retrofit lamp

US9095023B2 · kind B2 · utility

12Cited by

3References

12Claims

0Family size

Assignee

KONINIKLIJKE PHILIPS N.V. · NL

Inventors

Carsten Deppe · Aachen, DE
Georg Sauerlander · Aachen, DE
Harald Josef Günther Radermacher · Aachen, DE
Haimin Tao · Eindhoven, NL
William Peter Mechtildis Marie Jans · Born, NL

Key dates

Filing date	Oct 11, 2011
Grant date	Jul 28, 2015
Priority date	—
Expiry date	Jun 30, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/30
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The present invention relates to an LED lamp (1) adapted for operation with an alternating current. The LED retrofit lamp (1) comprises a LED unit (7, 7′, 7″, 7′″) and a compensation circuit with a controllable switching device (9, 9′), connected parallel to said LED unit (7, 7′, 7″, 7′″) to provide an alternate current path. A control unit (10, 10′, 10″) is adapted to control said switching device (9, 9′) in a compensation mode in which said switching device (9, 9′) is set to the conducting state for the duration of a shunt period in each half cycle of the alternating current to allow adapting the power/current of the inventive LED lamp (1), so that a versatile and optimized operation of the lamp (1) is possible.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.