Patent ID: 10714008

Abstract:
A pixel circuit for a display device employs a two-capacitor configuration, in which during the emission phase, the first and second plates of the capacitors respectively are electrically connected to each other to provide more stability to the gate voltage of the drive transistor. The pixel circuit also is operable in a combined threshold compensation and data programming phase to compensate for variations in the characteristics of the drive transistor and the light-emitting device. During a portion of the combined threshold compensation and data programming phase the drive transistor becomes diode-connected such that the gate and the second terminal of the drive transistor are electrically connected, wherein a threshold voltage of the drive transistor is compensated while the drive transistor is diode-connected. A first capacitor has a first plate that is connected to the gate of the drive transistor and a second plate that is connected to a node N1 at the light-emitting device, and a second capacitor has a first plate that is connected to the gate of drive transistor and the first plate of the first capacitor, and a second plate that is electrically connected to the node N1 during the emission phase.