Patent Number: 8,791,653

Title: Apparatus for coupling power source to lamp

Abstract: An apparatus coupling a power source to a light emitting diode lamp includes a first part for receiving first voltage and current signals from the power source and a second part for supplying second voltage and current signals to the lamp. The first part includes a detection part for detecting a first amplitude reduction in at least one of the first signals, for example in the first voltage signal, and the second part includes an introduction part for, in response to a detection result, introducing a second amplitude reduction into at least one of the second signals, for example into the second current signal. As a result, the first part detects a first dimming state caused by the power source, and the second part introduces a second dimming state in response to the first part having detected the first dimming state, and the apparatus has self-dimming capabilities, to keep the grid stable.

Inventors: Wendt; Matthias (Eindhoven, DE)

Assignee: Koninklijke Philips N.V.

International Classification: H05B 37/02 (20060101); H05B 33/08 (20060101)

Expiration Date: 7/29/12018