Patent ID: 9093027
Filing Date: 2015-07-28
Classification: G09G

Abstract:
1. A display device, comprising: a plurality of pixels connected to a first power source and a second power source, each pixel including an organic light emitting diode (OLED) and a driving transistor controlling a driving current supplied to the organic light emitting diode (OLED), wherein the driving transistor and the OLED are reset during a reset period of a frame, the reset period including a first period, a second period, and a third period; a sustain power supply unit applying a first sustain voltage to a plurality of data lines connected to the plurality of pixels; and a data driver applying one of a data signal and a second sustain voltage to the plurality of data lines, wherein: during the first period of the reset period, the sustain power supply unit applies the first sustain voltage as a first level voltage to the data lines in order to reset a gate voltage of the driving transistor in each pixel, and a voltage level of the first power source is equal or higher than a voltage level of the second power source, during the second period of the reset period after the first period of the reset period, the sustain power supply unit applies the first sustain voltage as a second level voltage higher than the first level voltage to the data lines in order to increase the gate voltage of the driving transistor in each pixel, and the voltage level of the first power source is equal or higher than the voltage level of the second power source, and during the third period of the reset period after the second period of the reset period, an anode voltage of the organic light emitting diode (OLED) in each pixel is discharged to be reset with a reset voltage, the reset voltage is controlled according to a voltage difference between the first level voltage and the second level voltage, and the voltage level of the first power source is lower than the voltage level of the second power source.