Pixel circuit and driving method therefor, array substrate, and display device

A driving method of a pixel circuit, the pixel circuit comprising a driving circuit, a data writing circuit, a first light emitting control circuit, a second light emitting control circuit, a first initialization circuit, a second initialization circuit and an energy storage circuit, wherein

• the driving circuit comprises a control terminal, a first terminal and a second terminal and is configured to control a driving current which flows through the first terminal and the second terminal for driving a light emitting element to emit light;
• the data writing circuit is configured to write a data signal into the control terminal of the driving circuit under control of a first scanning signal;
• the first light emitting control circuit is configured to apply a first power voltage from a first power terminal to the first terminal of the driving circuit under control of a first light emitting control signal;
• the second light emitting control circuit is configured to apply the driving current from the second terminal of the driving circuit to the light emitting element under control of a second light emitting control signal;
• the first initialization circuit is configured to apply a first initialization voltage to the control terminal of the driving circuit under control of a first reset control signal;
• the second initialization circuit is configured to apply a second initialization voltage to the second terminal of the driving circuit under control of a second reset control signal;
• the energy storage circuit is configured to store the data signal written in the control terminal of the driving circuit;
• wherein the first initialization circuit comprises a first transistor, the data writing circuit comprises a second transistor and the driving circuit comprises a third transistor;
• a leakage current characteristic of a semiconductor material of a first active layer of the first transistor is less than a leakage current characteristic of a semiconductor material of a third active layer of the third transistor;
• and a leakage current characteristic of a semiconductor material of a second active layer of the second transistor is less than the leakage current characteristic of the semiconductor material of the third active layer of the third transistor,
• the driving method comprises a first operating time period which comprises a reset phase, a sampling phase, a writing phase and a light emitting phase, wherein
• at the reset phase, the first initialization circuit is switched on under the control of the first reset control signal, applying the first initialization voltage to the control terminal of the driving circuit, and the second initialization circuit is switched on under the control of the second reset control signal, applying the second initialization voltage to the second terminal of the driving circuit;
• at the sampling phase, the first light emitting control circuit and the second light emitting control circuit are switched off, and the first initialization circuit is maintained on under the control of the first reset control signal, applying the first initialization voltage to the control terminal of the driving circuit;
• and the second initialization circuit is maintained on under the control of the second reset control signal, applying the second initialization voltage to the second terminal of the driving circuit;
• at the writing phase, the first initialization circuit, the second initialization circuit, the first light emitting control circuit and the second light emitting control circuit are switched off, the data writing circuit is caused to write the received data signal into the control terminal of the driving circuit under the control of the first scanning signal, and the data signal is stored in the energy storage circuit through the energy storage circuit;
• and
• at the light emitting phase, the first initialization circuit and the second initialization circuit are switched off, and the first light emitting control circuit is switched on under the control of the first light emitting control signal, applying the first power voltage of the first power terminal to the first terminal of the driving circuit, and the second light emitting control circuit is switched on under the control of the second light emitting control signal, applying the driving current from the second terminal of the driving circuit to the light emitting element to drive the light emitting element.