| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 315205000 | Plural discharge devices and/or rectifiers in the supply circuit | 9 |
| 20130069551 | Switching Power Supply, Luminaire, and Control Method for the Luminaire - A switching power supply includes a transformer, a resonant capacitor, a pair of switching elements, an inductor, and a rectifying element. The transformer includes a first winding, a second winding, and a third winding. The resonant capacitor is connected to both ends of the first winding. The switching elements are normally-on elements and alternately turned off according to a voltage induced in the third winding. Each of the switching elements includes a first main terminal, a second main terminal, and a control terminal. The inductor supplies a direct-current power supply voltage between the middle point of the first winding and the each first main terminal of the switching elements. The rectifying element rectify a voltage induced in the second winding. | 03-21-2013 |
| 20120229042 | INVERTER FOR CONTROLLING BACKLIGHT USING VARIABLE FREQUENCY OSCILLATOR - There is provided an inverter for controlling a backlight using a variable frequency oscillator, the inverter including: a variable frequency oscillator generating a reference waveform having a variable frequency through voltage charged in a first capacitor and voltage discharged therefrom by a current; and a main switching signal generator generating a switching signal for driving a plurality of lamps based on a first error voltage between output voltages corresponding to currents flowing in the lamps and a first reference voltage and the reference waveform, whereby damage of circuit elements such as the lamps, or the like, may be prevented and the brightness of the lamps may be constantly maintained. | 09-13-2012 |
| 20100033099 | THREE-LEVEL DIMMING CIRCUIT FOR DISCHARGING LAMP - A three-level dimming circuit for a discharging lamp includes a first contact, a second contact, and a third contact, a first full-wave rectification circuit connected to the first contact and the third contact, and a second full-wave rectification circuit connected to the first contact and the second contact. A selection circuit includes three resistors and a first electrical controlled switch. A half-wave rectification circuit includes a second electrical controlled switch and a third electrical controlled switch in series connection. The three resistors of the election circuit are the main devices for dimming that the present invention has a lower cost and superior competition in the market. | 02-11-2010 |
| 20100066259 | Circuit Arrangement and Method for Igniting a High-Pressure Discharge Lamp - A circuit arrangement for starting a high-pressure discharge lamp (LA), having a main combustion chamber (HaBk) with a first and a second main electrode (HaE | 03-18-2010 |
| 20120139432 | VOLTAGE DETECTION MODULE - The voltage detection module according to the invention comprises: a first electric terminal; a second ground terminal; a load resistor, connected to the first electric terminal; a main gas-filled spark gap, arranged in series between the load resistor and the second terminal; and a main capacitor, connected, on the one hand, to a first middle point situated between the load resistor and the main gas-filled spark gap and, on the other hand, to the second terminal. The voltage detection module also comprises a light source connected in series between the main gas-filled spark gap and the second terminal, the light source and the main gas-filled spark gap being separate from one another. The voltage detection module comprises an additional stage capable of limiting the voltage applied to the terminals of the gas-filled spark gap to a threshold voltage chosen so as to prevent the gas-filled spark gap from always being on. | 06-07-2012 |
| 20120062134 | DRIVING CIRCUIT FOR T8 LED LAMP - A driving circuit for a T8 light-emitting diode (LED) lamp mainly includes two bridge rectifiers. According to the electrical characteristics and the circuit designs of the bridge rectifiers, the T8 LED lamp can be driven to illuminate by the driving circuit while a starter needs not be removed from the T8 lamp holder. | 03-15-2012 |
| 20120025726 | REVERSED-POLARITY PULSE GENERATING CIRCUIT FOR DIRECT CURRENT PLASMA AND DIRECT CURRENT PLASMA POWER SUPPLY UNIT - A capacitor is connected between direct current voltage terminals, and inductance means is connected between one end of the capacitor and one of load terminals. In a case in which the direct current voltage exceeds a set value, voltage at both ends of the capacitor is shared by the first and second switching elements that are not electrically conductive; in a case in which the direct current voltage is below the set value, the first and second switching elements are electrically conductive on a periodic basis or as needed to output reversed-polarity voltage between load terminals; and in a case in which the first and second switching elements are turned off, voltage at both ends of the capacitor restricts voltage applied to both ends of the first and second switching elements, during a period in which the first and second feedback rectifier elements are electrically conductive. | 02-02-2012 |
| 20120256553 | SCR DIMMING CIRCUIT AND METHOD - The present invention relates to an SCR dimming circuit and method for regulating the luminance of an LED load. In one embodiment, an SCR dimming circuit can include: an SCR element that generates a lack-phase AC voltage based on a sinusoidal AC supply; a rectifier bridge that generates a lack-phase DC voltage based on the lack-phase AC voltage; a conduction angle generator that receives the lack-phase DC voltage, and generates a controlling signal representative of a conduction angle of the SCR element; and a dimming signal generator that generates a dimming signal to regulate luminance of the LED load, where the dimming signal generator receives the controlling signal, an adjustable signal, and a clamping voltage, an amplitude of a dimming phase angle range is selected by a fixed signal determined by the clamping voltage, and the dimming phase angle range may be shifted by regulating the adjustable signal. | 10-11-2012 |
| 20120319606 | FLUORESCENT TUBE DRIVING DEVICE - A fluorescent tube driving device including a first voltage converter, a second voltage converter, an oscillating unit, an inverter, an adjusting unit, a switching unit and a voltage stabilizing unit is provided. The first and the second voltage converters convert an alternating-current (AC) voltage to a first direct-current (DC) voltage and a second DC voltage. The oscillating unit is charged by the first DC voltage to generate a charging voltage and a trigger signal. The adjusting unit is charged by the charging voltage to generate a power supply signal. The switching unit transmits the second DC voltage according to the power supply signal. The voltage stabilizing unit stabilizes the voltage from the switching unit. Both of the oscillating unit and the adjusting unit are charged at a delay speed to synchronously transmit the operation voltage and the trigger signal to a controller in the inverter. | 12-20-2012 |
