| Patent application number | Description | Published |
|---|
| 20090051297 | Frequency modulation method and device for high intensity discharge lamp - An electronic control gear for a HID lamp receives an input signal for operating the lamp and frequency modulates the input signal to generate a frequency modulated output signal that drives an arc of the lamp. The frequency modulation of the output signal sweeps continuously between a low frequency modulation and a high frequency modulation, the low frequency modulation being a frequency f | 02-26-2009 |
| 20100060180 | CIRCUIT ARRANGEMENT FOR IGNITING AND OPERATING A DISCHARGE LAMP - A circuit arrangement for igniting and operating a gas discharge lamp having a half-bridge arrangement, which acts as a step-down inverter in quasi-resonant mode, a lamp inductor and a resonance capacitor that form a resonant circuit, and having an ignition transformer whose secondary winding is connected on the one hand to a lamp electrode and is connected on the other hand to the tie point between the lamp inductor and resonance capacitor, wherein the primary winding of the ignition transformer is connected with its first end to the tie point between the lamp inductor and resonance capacitor, and with its second end to the tie point of two series connected diodes, the first diode being connected to the power supply unit, and the second diode being connected to circuit ground. | 03-11-2010 |
| 20100060193 | METHOD AND CIRCUIT ARRANGEMENT FOR INCREASING THE DIELECTRIC STRENGTH OF METAL OXIDE TRANSISTORS AT LOW TEMPERATURES - A method and circuit arrangement for increasing the dielectric strength of at least one metal oxide transistor at low temperatures is described. Various embodiments include heating the metal oxide transistor prior to the application of a voltage in the vicinity of a breakdown voltage of the metal oxide transistor. | 03-11-2010 |
| 20100117548 | CIRCUIT ARRANGEMENT FOR IGNITING AND OPERATING A DISCHARGE LAMP - A circuit arrangement for starting and for operating a gas discharge lamp with an AC step-down converter or a half-bridge arrangement, which functions as a step-down inverter during quasi-resonant operation, a lamp inductor and a resonant capacitor, which form a resonant circuit, and a smoothing inductor, wherein the resonant capacitor is dimensioned in terms of its value such that, during normal operation of the lamp, a voltage ripple of over 100 V from maximum to maximum is present across said resonant capacitor, the smoothing inductor being dimensioned in such a way that it can filter the majority of the voltage ripple, and the switching frequency at the same time being between 200 kHz and 500 kHz. | 05-13-2010 |
| 20110037398 | Circuit Arrangement and Method for Starting a Discharge Lamp - A circuit arrangement for starting a discharge lamp, with a primary circuit, which comprises a series circuit comprising an inductance (L), a starting capacitor (C | 02-17-2011 |
| 20110234116 | METHOD FOR PROGRAMMING ELECTRONIC OPERATING DEVICES FOR DISCHARGE LAMPS AND ELECTRONIC OPERATING DEVICE FOR DISCHARGE LAMPS - A method for programming an electronic operating device is provided. The method may include programming the operating device via a slow on/off switching pattern of its supply voltage, the operating device being configured to automatically dim the connected light or lights on a time-control basis after programming, and choosing the time base of the on/off switching pattern used for programming such that a person can carry out the programming using a clock and an on/off switch for the supply voltage. | 09-29-2011 |
| 20110298383 | ELECTRONIC OPERATING DEVICE FOR A GAS DISCHARGE LAMP - The invention relates to an electronic operating device for a gas discharge lamp having: a DC/DC voltage converter, a power factor correction circuit, an inverter, a lamp inductor, and having a full bridge with two half bridges which can be controlled separately, wherein the DC/DC voltage converter additionally acts as a voltage step-down converter, and the inverter additionally has the following functions: lamp current regulation, the function of stepping down the voltage to the lamp voltage, and resonant ignition. | 12-08-2011 |
