De Krijger
Josef Petrus Emanuel De Krijger, Eindhoven NL
Patent application number | Description | Published |
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20090267528 | LAMP DRIVING CIRCUIT - A lamp driving circuit ( | 10-29-2009 |
Jozef Petrus Emanuel De Krijger, Eindhoven NL
Patent application number | Description | Published |
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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 |
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 |
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 |
Marjo De Krijger, Amersfoort NL
Patent application number | Description | Published |
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20120182543 | Method for Determining Weights of Eggs, and Apparatus - The present invention relates to a method for determining weights of eggs, comprising,—exposing the eggs to electromagnetic radiation having a wavelength of at least 200 nm and thereby illuminating and/or candling the eggs,—recording and processing images that are obtained from differences in intensity of radiation transmitted during illuminating and/or candling, whereby image data and/or derivatives thereof are established, wherein the method furthermore comprises at least a second type of detection, wherein in combination with the image data and/or derivatives thereof the weight of each egg is obtained. The proposed second manner of detection is preferably either a detection method utilizing a vibration analysis or a method in which a specific form of image processing and image analysis is used. Furthermore, the invention relates to devices suitable for these detection methods, as well as to apparatuses, such as sorting machines, where these devices are used. | 07-19-2012 |