Patent ID: 8614655

Claim:
A pixel circuit of an organic light emitting diode (OLED) display device comprising scan lines, data lines, gate control lines, a power supply, and pixel regions defined by the scan lines and the data lines, the pixel circuit comprising: a switching transistor for performing a switching operation in response to a scan signal from a corresponding one of the scan lines; a capacitor for storing a data signal received from a corresponding one of the data lines through the switching transistor; a first driving transistor for generating a first driving current in response to the data signal stored in the capacitor; a second driving transistor coupled in parallel with the first driving transistor and adapted to be turned on and off in response to a control signal from a corresponding one of the gate control lines transmitted at intervals during stoppage of a display operation to generate an intermittent second driving current; and an organic light emitting diode for performing a light emission operation according to the first driving current flowing through the organic light emitting diode during the display operation and according to the second driving current flowing through the second driving transistor and the organic light emitting diode during the stoppage of the display operation, wherein the control signal varies between first and second levels during an operation of the pixel circuit, wherein a first electrode of the first driving transistor is connected to a first electrode of the second driving transistor, and wherein a second electrode of the first driving transistor and a second electrode of the second driving transistor are connected to an anode of the organic light emitting diode.