| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 315278000 | Three or more coil-type transformers | 7 |
| 20080211425 | AUTOMOTIVE HID HEADLAMP BALLAST CONTROL IC - A ballast control integrated circuit for a ballast driving a high intensity discharge (HID) lamp. The control integrated circuit has a first circuit for controlling a DC to DC converter receiving a first DC voltage and providing an increased DC voltage. The first circuit includes a driver for providing a pulsed signal to drive a first switch coupled to a flyback transformer of the DC to DC converter. A second circuit controls a DC to AC converter, the second circuit controlling a switching circuit receiving the increased DC voltage and driving the HID lamp with an AC voltage. The second circuit has a driver circuit for driving the switching circuit. The switching circuit is an H-bridge switching circuit coupled to drive the HID lamp. | 09-04-2008 |
| 20090033242 | COIL COMPONENT AND DISPLAY DEVICE USING SAME - The coil component comprises a primary coil, and a first secondary coil and a second secondary coil which are opposed to the primary coil. A first terminal is a terminal of the first secondary coil, that is a terminal for connection to one end of a lamp, and a second terminal is a terminal of the second secondary coil, that is a terminal for connection to the other end of the lamp. The first secondary coil and the second secondary coil are coaxially disposed, and the first terminal and the second terminal are reverse in polarity. | 02-05-2009 |
| 20090160353 | MULTI-LAMP BACKLIGHT APPARATUS - The invention discloses a multi-lamp backlight apparatus. The multi-lamp backlight apparatus includes a first lamp, a second lamp, a controlling unit, a resonating unit, and a balance transformer. The controlling unit is used for generating a controlling signal. The resonating unit is used for converting the controlling signal into a resonating signal. The balance transformer includes a primary winding, a first secondary winding, and a second secondary winding. The primary winding is used for receiving the resonating signal. The first secondary winding is corresponding to the primary winding and coupled to the first lamp. The second secondary winding is corresponding to the primary winding and coupled to the second lamp. | 06-25-2009 |
| 20090195177 | Self-excited inverter driving circuit - To provide a low-cost self-excited inverter driving circuit exhibiting an excellent operational efficiency. A main inverter section is so constructed that a part of output signals is fed back by a resonance loop circuit to cause a self-excited oscillation to occur in the vicinity of a resonance frequency decided by leakage inductors and capacitors on the secondary side of a high voltage transformer, thereby performing an inverter operation. It is further arranged that a halt interval setting signal, which is generated by a triangular wave forming circuit and a control section, is applied to the main inverter section, thereby halting the inverter operation in accordance with the halt interval setting signal. | 08-06-2009 |
| 20120074864 | METHOD AND CIRCUIT ARRANGEMENT FOR GENERATING A PULSED VOLTAGE - The invention proposes a circuit arrangement for converting a DC voltage from a DC power supply into a pulsed voltage to operate or drive a load, for example, a DBD lamp. The circuit arrangement comprises a transformer having a primary winding and a secondary winding, a first controllable switch branch, a second controllable switch branch, and a control unit. The control unit is configured to control the first controllable switch branch and the second controllable switch branch to be alternately turned on so that at least part of the energy from the DC power supply is stored in the primary winding during each turn-on period of the first controllable switch branch and the second controllable switch branch, and to leave an idle time between the two adjacent turn-on periods so that at least part of the stored energy is transferred to the secondary winding to alternately generate a positive pulsed voltage during one idle time and a negative pulsed voltage during the next idle time. | 03-29-2012 |
| 20120081026 | Fixed-time, fixed-frequency, preheat-type ballast circuit for fluorescent light tube - The present invention is to provide a ballast circuit, which includes a preheat circuit configured to perform a fixed-time, fixed-frequency preheating process on filaments at both ends of a fluorescent light tube before it is lit. While the filaments are being preheated, a power driving circuit generates an output signal whose frequency is far higher than resonant frequency of a resonant circuit, and controls the preheat circuit for enabling a filament transformer and a high-frequency coupling capacitor in the preheat circuit to couple the voltage of the output signal to the filaments and thereby preheat the filaments, but not light up the light tube. When the preheat period is up, the power driving circuit stops the preheating process and changes the frequency of the output signal to a level close to the resonant frequency, thereby oscillating the resonant circuit and generating a high voltage enough for lighting the light tube. | 04-05-2012 |
| 20120223654 | Electronic system as well as a base part and an electronic module suitable for such an electronic system - An electronic system comprises at least a base part, a power source and at least one electronic module adapted to be powered by the power source. The base part is provided with at least two parallel extending, elongated tracks being electrically conductive. At least one parameter of the electronic module is changeable by amending the distance of the electronic module to a predetermined location on the tracks. | 09-06-2012 |
