Patent ID: 7889159

Claim:
A display system comprising: a pixel circuit having: a light emitting device; a capacitor; a first switch transistor having a gate terminal, a first terminal and a second terminal, the gate terminal of the first switch transistor being connected to a first select line, one of the first and second terminals of the first switch transistor being connected to a signal line, the other terminal being connected to a first terminal of the capacitor; a second switch transistor having a gate terminal, a first terminal and a second terminal, the gate terminal of the second switch transistor being connected to a second select line, one of the first and second terminals of the second switch transistor being connected to a second terminal of the capacitor and the light emitting device, the other terminal being connected to a bias line; a driving transistor for driving the light emitting device, the driving transistor having a gate connected to the first terminal of the capacitor; and driver circuitry for programming the pixel circuit during a programming cycle and driving the pixel circuit during a driving cycle, the driver circuitry providing on the signal line a voltage or voltages as a function of a bias voltage and a programming voltage dependent on a programming data for said pixel circuit, and a controllable bias current, independent of said programming data for said pixel circuit, on the bias line to accelerate said programming and compensate for a time-dependent parameter of the pixel circuit.