| Patent application number | Description | Published |
|---|
| 20090066400 | Circuit for Switching a Voltage-Controlled Transistor - A circuit comprising a voltage-controlled transistor (T | 03-12-2009 |
| 20090121645 | Circuit Arrangement for Operating a Discharge Lamp Having Temperature Compensation - The invention relates to a circuit arrangement which is used to operate a low pressure discharge lamp (EL), wherein the discharge lamp receives power. Said circuit arrangement is embodied in such a manner that power-determination components (C | 05-14-2009 |
| 20090206765 | Electronic ballast with phase dimmer detection - The invention relates to an electronic ballast comprising a converter which is used to operate a discharge lamp, for example, a low pressure discharge lamp, for selectively operating, in a direct manner, the supply network or a phase section dimmer. Jumps in the supply voltage are decoupled by a differential which is connected between at least one of the network lines and the reference potential of the ballast and transmitted to a control of the ballast, such that the control of the converter can distinguish between the operation on the phase section dimmer and on the network supply. | 08-20-2009 |
| 20090206774 | Electronic reactive current oscillation-reducing ballast - The invention relates to an electronic ballast presenting an input capacitor and comprising and step-up chopper for operating a load, for example a discharge lamp, on a phase control dimmer having an integrated or parasite inductance. In such a way, the voltage overshooting on the input capacitor are reduced by active charge or discharge thereof. | 08-20-2009 |
| 20090295301 | Self-exciting step-up converter - An electronic ballast includes a step-up converter, which includes a storage inductor, a diode, an intermediate circuit condenser and a switch element. According to the invention, a current passing through the storage inductor is used in the form of an indicator of turnon and turnoff times of the step-up converter oscillates in a self-exciting manner. | 12-03-2009 |
| 20090302773 | Electronic reactive current oscillation-reducing ballast - An electronic ballast presenting an input capacitor (C) and including a step-up converter (LH, DH, SH, CH) for operating a load, for example a discharge lamp (CFL), on a phase control dimmer (DIM) having an integrated or parasite inductance (L). According to the invention, excessive voltage after connection with a phase control can be reduced by adjusting currents via of the step-up converter (LH, DH, SH, CH). | 12-10-2009 |
| 20100013403 | Step-Up Driver With Minimal Switching Frequency - The invention relates to an electronic ballast comprising a step-up converter for operating a discharge lamp. The electronic ballast is embodied in such a way as to disconnect a switching element (T | 01-21-2010 |
| 20100259103 | SWITCHABLE CURRENT SUPPLY FOR AUXILIARY CURRENT CIRCUITS IN A CURRENT CONVERTER - A circuit arrangement with a switchable voltage supply for a control apparatus may include a DC voltage supply terminal; and an AC voltage supply terminal; a control apparatus including at least one input, an output and at least one supply terminal; three electronic switches, each having a control electrode, a reference electrode and a working electrode, wherein the reference electrode of the first electronic switch and of the second electronic switch is coupled to the first node; wherein the working electrode of the first electronic switch is coupled to the supply terminal of the control apparatus; wherein the control electrode of the first electronic switch is coupled to a reference potential, wherein at least one further load is coupled to the working electrode of the second electronic switch. | 10-14-2010 |
| 20110101882 | Method For Transmitting Control Information From A Control Device To A Lamp Unit As Well As A Corresponding Illuminating System, Lamp Unit And Control Device - A method is provided for driving at least one lamp unit, which is connected to an AC voltage power supply system. The method comprises modulating a control information item for the operation of the lamp unit onto the supplied AC voltage, decoding of the modulation received on the lamp unit side for reading the control information item and driving the light-emitting device in accordance with the control information item. Provision is made for a shunt to be produced in the line used for transmitting the control information item prior to or at the beginning of the modulation of the control information item. The disclosure also provides a lamp unit and a control device for implementing the method. The disclosure also provides a lighting system. | 05-05-2011 |
