| CPC G09G 3/3233 (2013.01) [G09G 3/32 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0247 (2013.01); G09G 2330/021 (2013.01)] | 6 Claims |
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1. A driving method for a pixel circuit, the pixel circuit comprising: a first reset transistor, a compensation transistor, a drive transistor, a data writing transistor, a first light emitting control transistor, a second light emitting control transistor, a light emitting device and a first capacitor; wherein:
the first reset transistor is coupled between a first electrode of the light emitting device and a first initialization signal terminal, and a gate of the first reset transistor is coupled to a first light emitting control terminal;
a second electrode of the light emitting device is coupled to a first power supply terminal;
the compensation transistor is coupled between a gate and a first electrode of the drive transistor, and a gate of the compensation transistor is coupled to a first scan control terminal;
the data writing transistor is coupled between a second electrode of the drive transistor and a data signal terminal, and a gate of the data writing transistor is coupled to a second scan control terminal;
the first light emitting control transistor is coupled between a second power supply terminal and the second electrode of the drive transistor, and a gate of the first light emitting control transistor is coupled to the first light emitting control terminal;
the second light emitting control transistor is coupled between the first electrode of the drive transistor and the first electrode of the light emitting device, and a gate of the second light emitting control transistor is coupled to a second light emitting control terminal;
the first capacitor is coupled between the second power supply terminal and the gate of the drive transistor;
wherein types of the first light emitting control transistor and the second light emitting control transistor are same and opposite to a type of the first reset transistor; the first light emitting control terminal is configured to receive a first light emitting control signal, the second light emitting control terminal is configured to receive a second light emitting control signal, the first light emitting control signal and the second light emitting control signal are provided by output terminals in different stages of a same light emitting drive unit, and the second light emitting control signal is earlier than the first light emitting control signal;
the method comprises:
dividing a current display frame of a display device into one writing frame and N holding frames according to a current refresh frequency and a reference refresh frequency of the display device, wherein N is an integer greater than 1, and the writing frame comprises a first phase, a second phase, a third phase, a fourth phase and a fifth phase arranged in sequence;
in the first phase, controlling the first light emitting control transistor, the drive transistor and the compensation transistor to be turned on, and resetting potentials of the first electrode, the gate and the second electrode of the drive transistor through the second power supply terminal;
in the second phase, controlling the first reset transistor, the compensation transistor and the second light emitting control transistor to be turned on, resetting the potentials of the first electrode, the gate and the second electrode of the drive transistor, and resetting a potential of the first electrode of the light emitting device through the first initialization signal terminal;
in the third phase, controlling the first light emitting control transistor and the drive transistor to be turned on, and resetting potentials of the first electrode and the second electrode of the drive transistor;
in the fourth phase, controlling the first reset transistor, the compensation transistor, the drive transistor and the data writing transistor to be turned on, resetting the potential of the first electrode of the light emitting device, loading a data signal provided by the data signal terminal to the second electrode of the drive transistor, writing a threshold voltage of the drive transistor and the data signal into the gate of the drive transistor through the compensation transistor, and storing the threshold voltage and the data signal in the first capacitor;
in the fifth phase, controlling the first reset transistor and the second light emitting control transistor to be turned on, and resetting a potential of the first electrode of the drive transistor through the first initialization signal terminal.
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