Patent ID: 8199082

Claim:
A display device, comprising: a pixel unit comprising: a driving transistor comprising a gate and a source; and a capacitor coupled between the gate and the source; a selection unit selectively transmitting a first voltage or a second voltage to the driving transistor, wherein the selection unit transmits the first voltage to the gate and the source during a first period and transmits the second voltage to the gate during a second period, and wherein the selection unit comprises: a first transistor transmitting the first voltage to the source according to a first switching signal; a second transistor transmitting the first voltage to the gate according to a first pre-charge signal; and a third transistor transmitting the second voltage to the gate according to a second pre-charge signal; and a control unit controlling the selection unit and receiving the voltage of the source, wherein the control unit detects the voltage of the source during the second period.