Patent ID: 9704436
Date: 2017-07-11
CPC Classifications: G09G

Claim:
1. A pixel circuit, wherein a drive period of the pixel circuit successively comprises a reset phase, a compensation phase, a data writing phase and a light emission phase, and the pixel circuit comprises: a reset unit, which receives a reference control signal and a reference signal whose potential is a reference potential, and is configured to output the reference signal under the control of the reference control signal in the reset phase and the compensation phase; a data writing unit, which receives a gate control signal and a data signal whose potential is a data potential, and is configured to output the data signal under the control of the gate control signal in the data writing phase; a compensation unit, which is connected to the reset unit and the data writing unit as well as an output node, receives a power voltage signal, and is configured to: in the reset phase, reset a potential of the output node by using the reference signal and the power voltage signal at a low potential; in the compensation phase, pull the potential of the output node from the reset potential up to a first potential by using the reference signal and the power voltage signal at a high potential; in the data writing phase, pull the potential of the output node from the first potential up to a second potential by using the data signal and the power voltage signal in a floating state; and in the light emission phase, under the action of the power voltage signal at a high potential, generate a light emission drive signal and output the light emission drive signal to the output node; and a light-emitting unit, which is connected to the output node and a cathode of a power supply, and configured to emit light under the drive of the light emission drive signal in the light emission phase.