Patent · US Active

LED retrofit lamp

US9622317B2 · kind B2 · utility

33Cited by

6References

12Claims

0Family size

Assignee

PHILIPS LIGHTING HOLDING B.V. · NL

Inventors

Bernd Ackermann · Aachen, DE
Haimin Tao · Eindhoven, NL
Georg Sauerlaender · Aachen, DE
Bernhard Christiaan Van Dijk · Oss, NL
Borong Su · Eindhoven, NL

Key dates

Filing date	Aug 29, 2014
Grant date	Apr 11, 2017
Priority date	—
Expiry date	Aug 29, 2034

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 retrofit lamp (700) adapted for operation with an alternating current. The LED lamp comprises an LED unit (740), a mains current line, first and second switching devices (710, 720) (e.g., first and second relays), and a control unit (730). The control unit (730) detects an ignition voltage on the mains current line. In response to detecting the ignition voltage on the mains current line, the control unit (730) sets the first and second switching devices (710, 720) to a conducting state such that the LED unit (740) is connected to power. By using the first and second switching devices (710, 720), safety of the LED lamp (700) is improved, in particular when installing the lamp (700) into a fixture designed for fluorescent lamps.

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