Patent ID: 7834870
Filing Date: 2010-11-16
Classification: G09G

Abstract:
1. A plasma display device, comprising: a plasma display panel (PDP) including a plurality of first electrodes and a plurality of second electrodes, and in which discharge cells are formed corresponding to points where the first electrodes and the second electrodes cross; a driver for driving electrodes of the PDP; a temperature detector for detecting a temperature; a power supply; and a controller, wherein the power supply controls an output voltage of the power supply by using a voltage divided by a plurality of first resistors coupled to an output terminal of the power supply, outputs the output voltage as a driving voltage of the driver, and varies resistance of at least one first resistor according to the temperature detected by the temperature detector, wherein the controller divides a frame into a plurality of subfields, a subfield including a reset period, an address period, and a sustain period, wherein the driver gradually decreases a voltage at a first electrode from a first voltage to a second voltage in the reset period, wherein the output voltage of the power supply comprises the second voltage, and wherein when the temperature of the PDP is at a first temperature, the power supply adjusts the second voltage to be lower than the second voltage when the temperature of the PDP is at a second temperature, the second temperature being lower than the first temperature, and wherein the power supply comprises: a transformer including a primary coil coupled to an input power and a secondary coil coupled to an output terminal; a first switch coupled to the primary coil and determining a voltage output to the output terminal according to a duty ratio; a variable resistor controller for determining a resistance of at least one first resistor in response to the temperature of the PDP; a feedback circuit for determining a feedback voltage in response to the voltage divided by the first resistors; and a feedback controller for determining the duty ratio of the first switch in response to the feedback voltage.