Van Elk

Henricus Theodorus Petrus Johannes Van Elk, Ravenstein NL

Patent application number	Description	Published
20110260635	METHOD OF IGNITING A LAMP, CONTROLLER FOR A LAMP, AND A LAMP CONTROLLED BY A CONTROLLER - A method of igniting a lamp is disclosed. The lamp may be a compact fluorescent lamp. The method is directed in particular to reducing or eliminating hard-switching of half-bridge switches driving a lamp. The method operates by reducing the on-time of at least one of the switches, in response to saturation of the ballast inductor. The method can operate immediately upon saturation of the ballast inductor, or allow a predetermined level of saturation. The method operates by increasing the slope of the sawtooth timing circuit.	10-27-2011

Patent application number	Description	Published
20110025228	WAVEFORM DETECTION AND COMBINED STEP AND LINEAR DIM CONTROL - The present invention relates to a detection circuit (	02-03-2011

Patent application number	Description	Published
20110241556	METHOD OF CONTROLLING A FLUORESCENT LAMP, A CONTROLLER AND A FLUORESCENT LAMP - A method of controlling a Fluorescent Lamp (CFL) is disclosed, which enables the lamp to be dimmed during a quick-start mode in which the lamp current may be boosted. The method involves determining a boost value and a dimming value, and controlling the lamp power in dependence on the boost and dimming values. A dimming threshold may be set, below which (i.e. at dimmer output light levels) the boost function is disabled. Hysteresis may be included in the control, in order to avoid hopping between modes. A controller for use with a fluorescent lamp which is adapted to operate according to such a method and a fluorescent lamp using such a controller are also disclosed.	10-06-2011