| Patent application number | Description | Published |
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| 20100321000 | AC DETECTION CIRCUIT FOR POWER SUPPLY - There is provided an alternating current (AC) detection circuit for a power supply, the circuit including: a rectifying part rectifying an AC voltage; a voltage division part dividing the voltage rectified by the rectifying part according to a preset division ratio; a voltage stabilization circuit part stabilizing the voltage divided by the voltage division part; a comparing part comparing the voltage stabilized by the voltage stabilization circuit part with an internal reference voltage and generating an input detection signal when the stabilized voltage is higher than the internal reference voltage; and an output part outputting an AC detection signal when the input detection signal is inputted from the comparing part. | 12-23-2010 |
| 20110007051 | DRIVER FOR PLASMA DISPLAY PANEL - Disposed is a driver for a plasma display panel, which is capable of absorbing surplus power of a plasma display panel by power conversion switching performed according to the switching of a sustain circuit to form a transmission path using resonance between the inductance of a transformer for power conversion and the capacitance of the plasma display panel, without using an energy recovery circuit. The driver includes a power supply unit including preset inductance, and converting alternating current (AC) commercial power into preset driving power by using the inductance, a driving unit switching the driving power from the power supply unit according to a logic signal and supplying the switched driving power to a plasma display panel. Surplus power of the driving unit is transmitted to the power supply unit by resonance between the inductance of the power supply unit and capacitance of the plasma display panel. | 01-13-2011 |
| 20110013435 | AC DETECTION CIRCUIT FOR POWER SUPPLY - There is provided an alternating current (AC) detection circuit for power supply, the AC circuit including: a rectifying part rectifying an AC voltage; a voltage division part dividing the voltage rectified by the rectifying part according to a preset division ratio; a voltage stabilization circuit part stabilizing the voltage divided by the voltage division part; and a first square wave generating part comparing the voltage stabilized by the voltage stabilization circuit part with an internal reference voltage, and generating a first square wave signal having a duty ratio according to comparison results between the stabilized voltage and the internal reference | 01-20-2011 |
| 20110074299 | DRIVER FOR PLASMA DISPLAY PANEL HAVING SEPARATED BOARD STRUCTURE - There is provided a driver for a plasma display panel having a separated board structure that can reduce parasitic resonance by shortening the length of a cable used for power transmission by separating a board having a Y electrode switch thereon from a board having an X electrode switch thereon. A driver for a plasma display panel having a separated board structure according to an aspect of the invention may include: a first board having a predetermined mounting area, and mounted with a power supply section having predetermined inductance and converting commercial AC power into predetermined driving power using the inductance, and a first electrode switch section, switching the driving power from a power conversion section and supplying the switched driving power to a first electrode of a plasma display panel; and a second board having a predetermined mounting area, physically separated from the first board, and mounted with a second electrode switch section receiving the driving power from the power supply section through a cable and switching the driving power to supply the switched driving power to a second electrode of the plasma display panel. | 03-31-2011 |
| 20110080394 | DRIVER FOR PLASMA DISPLAY PANEL - There is provided a driver for a plasma display panel that can perform power transmission by setting different paths for an address period and a sustain period. The driver for a plasma display panel may include: a power supply part converting commercial AC power into predetermined driving power; a driving part switching the driving power from the power supply part during the sustain period to supply the switched driving power to the plasma display panel; and a path setting part setting a path through which the driving power from the power supply part is transmitted to the driving part during the sustain period and setting a charging path through which a capacitor is charged with the driving power from the power supply part during the address period. | 04-07-2011 |
| Patent application number | Description | Published |
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| 20090109717 | POWER FACTOR CORRECTED CIRCUIT HAVING INTEGRATED COIL - There is provided a power factor corrected circuit having an integrated coil in which a plurality of inductors that have been separately used for circuits are wound around one core. The power factor corrected circuit includes a rectifying unit for rectifying a common AC power supply; a coil unit for controlling the change in electric current of the rectified power supply from the rectifying unit according to the switching operation; and a switching unit for complementarily switching the power supply from the coil unit, wherein the coil unit has a core including first and second coils electrically coupled to each other; and first, second and third legs magnetically coupled to each other, and the first coil is wound around the first leg, the second coil is wound around the second leg, and the third leg is combined with the first and the second leg to form magnetic flux paths, respectively. | 04-30-2009 |
| 20100097363 | SWITCHING MODE POWER SUPPLY CIRCUIT FOR PLASMA DISPLAY PANEL - Provided is a switching mode power supply circuit for plasma display panel, which includes an EMI filter unit, a PFC unit, an output unit, and a standby unit. The EMI filter unit may include a first line filter connected to a commercial line input power, a first capacitor and discharge resistor connected to the first line filter, a second line filter connected to the first capacitor and discharge resistor, a second capacitor connected to the second line filter, and a relay unit disposed between the first line filter and the first capacitor and discharge resistor. The standby unit may be connected to a contact point of the first line filter and the relay unit. | 04-22-2010 |
