Patent ID: 8232986

Claim:
A light emitting display comprising: a pixel circuit that outputs a driving current corresponding to a data voltage from a data line using a scan signal, a first driving voltage and a second driving voltage; and a light emitting element that emits light by the driving current from the pixel circuit, wherein the pixel circuit comprises: a switching transistor turned on/off in response to the scan signal from a scan line, the switching transistor interconnecting the data line and a first node when turned on; a control transistor turned on/off in response to a control signal from a control signal line, the control transistor interconnecting a second node and a third node when turned on; a driving transistor turned on/off in response to a voltage on the second node, the driving transistor interconnecting the third node and a second driving voltage line when turned on, the second driving voltage line transmitting the second driving voltage; a first storage capacitor connected between the first node and the second node; and a second storage capacitor connected between the first node and the second driving voltage line; wherein: the light emitting display is driven separately in a first initialization period, a threshold voltage detection setup period, a threshold voltage detection period, a second initialization period, an actual data input period, and a light emitting period; the first driving voltage is maintained at a low voltage for the first initialization period and the threshold voltage detection setup period, at a middle voltage from a start of the threshold voltage detection period until an end of the actual data input period, and at a high voltage for the light emitting period; the second driving voltage is maintained at a low voltage for all the periods; the control signal is maintained at a high voltage for a part of the threshold voltage detection period and at a low voltage for the other periods; the scan signal is maintained at a high voltage for a part of the first initialization period, the threshold voltage detection period, the second initialization period and sequentially maintained at high voltage for the actual data input period and at a low voltage for the other periods; and the data voltage is maintained at a high voltage for “a part” the first initialization period, the second initialization period and a part of actual data input period and at a low voltage for the other periods.