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. 11, 2017
Filed:
Aug. 29, 2014
Philips Lighting Holding B.v., Eindhoven, NL;
Bernd Ackermann, Aachen, DE;
Haimin Tao, Eindhoven, NL;
Georg Sauerlaender, Aachen, DE;
Bernhard Christiaan Van Dijk, Geldrop, NL;
Borong Su, Eindhoven, NL;
PHILIPS LIGHTING HOLDING B.V., Eindhoven, NL;
Abstract
The present invention relates to an LED retrofit lamp () adapted for operation with an alternating current. The LED lamp comprises an LED unit (), a mains current line, first and second switching devices () (e.g., first and second relays), and a control unit (). The control unit () detects an ignition voltage on the mains current line. In response to detecting the ignition voltage on the mains current line, the control unit () sets the first and second switching devices () to a conducting state such that the LED unit () is connected to power. By using the first and second switching devices (), safety of the LED lamp () is improved, in particular when installing the lamp () into a fixture designed for fluorescent lamps.