Patent ID: 8044893

Claim:
A pixel circuit comprising: a light emitting device having a first electrode and a second electrode; a driving transistor having a gate terminal, a first terminal and a second terminal, the first terminal of the driving transistor being connected to the first electrode of the light emitting device; a first capacitor having first and second terminals, the first terminal of the first capacitor being connected to the gate terminal of the driving transistor, the second terminal of the first capacitor being connected to the first terminal of the driving transistor and the first electrode of the light emitting device; a first switch transistor having a gate terminal, a first terminal and a second terminal, the first terminal of the first switch transistor being connected the gate terminal of the driving transistor and the first terminal of the first capacitor; and a programming circuit having a programming transistor, the programming transistor having a gate terminal, a first terminal and a second terminal, the first terminal being connected to the first electrode of the light emitting device, the gate of said programming transistor being directly connected to a first data line, wherein, during a programming cycle of the pixel circuit, the programming transistor converts a voltage from the first data line to a current to adjust the voltage at said first electrode of said light emitting device, and during a driving cycle of the pixel circuit, the programming transistor is turned off and the light emitting device is driven with the pixel current from said driving transistor.