Inventors list |
Assignees list |
Classification tree browser |
Top 100 Inventors |
Top 100 Assignees |
Nijhof
Engbert Nijhof, Eindhoven NL
| Patent application number | Description | Published |
|---|---|---|
| 20090115341 | LAMP DRIVING CIRCUIT - In a lamp driving circuit for operating a high intensity discharge lamp, an a commutation circuit comprises at least two switching devices. The switching devices are alternately switched active at a commutation frequency. The active switching device switches at a switching frequency. During an ignition mode, the switching frequency and the commutation frequency are substantially equal. A resulting commutation voltage is supplied to an inverter resonant circuit for generating a supply current. At a node of the inverter resonant circuit, a clamping circuit limits the generated voltage to a predetermined maximum voltage. The voltage at said node of the inverter resonant circuit is applied to an output resonant circuit. The output resonant circuit operates in the ignition mode as a resonator for generating a high ignition voltage; in a steady state operation mode, the output resonant circuit operates as a low-pass filter for reducing a high frequency current component in a lamp current. | 05-07-2009 |
Engbert Bernard Gerard Nijhof, Eindhoven NL
| Patent application number | Description | Published |
|---|---|---|
| 20090134878 | METHOD AND SYSTEM FOR OPERATING A DISCHARGE LAMP SUCH AS TO DETECT DEFECTIVE OPERATION OF THE LAMP - A method is described for detecting defective operation of a discharge lamp ( | 05-28-2009 |
| 20090267528 | LAMP DRIVING CIRCUIT - A lamp driving circuit ( | 10-29-2009 |
| 20100026189 | LAMP DRIVING CIRCUIT, AND DETECTION CIRCUIT FOR DETECTING AN END-OF-LIFE CONDITION - A lamp driving circuit ( | 02-04-2010 |
| 20100060184 | METHOD AND SYSTEM FOR OPERATING A GAS DISCHARGE LAMP - In an application of a gas discharge lamp (La) arranged at a relatively large distance from its driving lamp driver circuit, parasitic capacitances (C | 03-11-2010 |
Niels Nijhof, Eindhoven NL
| Patent application number | Description | Published |
|---|---|---|
| 20110013816 | RESPIRATION DETERMINATION APPARATUS - The present invention relates to a respiration determination apparatus and method for determining respiration of a person ( | 01-20-2011 |
| 20110026666 | OBJECT LOCALIZATION IN X-RAY IMAGES - An x-ray system ( | 02-03-2011 |