Patent ID: 8497825
Filing Date: 2013-07-30
Classification: G09G,H01L

Abstract:
1. 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 coupled to 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 directly being 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 terminal of said driving transistor to program a pixel current of said driving transistor, 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.