Patent ID: 8253665

Claim:
A display system, comprising: a pixel circuit having a light emitting device and including: a drive transistor connected to the light emitting device, the drive transistor including a gate terminal, a first terminal and a second terminal; a first switch transistor including a gate terminal, a first terminal and a second terminal, the gate terminal of the first switch transistor being connected to a select line, the first terminal of the first switch transistor being connected to a data line providing voltage programming information, the second terminal of the first switch transistor being connected to the gate terminal of the drive transistor; and a circuit for adjusting the gate voltage of the drive transistor by discharging the voltage on the gate terminal of the drive transistor through a discharging transistor having a resistance that changes based on the aging of the pixel circuit, a gate terminal of the discharging transistor being connected to the gate terminal of the drive transistor at a node, the circuit for adjusting further including a second switch transistor connected between the discharging transistor and the gate terminal of the drive transistor.