Pixel circuit and driving method therefor and display panel

A pixel circuit, comprising:

• a reset circuit, a data writing circuit, a compensation circuit, a storage circuit, a driving circuit, a first light-emitting control circuit, and a second light-emitting control circuit,
• wherein the driving circuit comprises a driving transistor, the compensation circuit comprises a first transistor, the first light-emitting control circuit comprises a second transistor, the second light-emitting control circuit comprises a third transistor, the reset circuit comprises a fourth transistor, the data writing circuit comprises a fifth transistor, and the storage circuit comprises a storage capacitor;
• a gate electrode of the first transistor is configured to receive a compensation control signal, a first electrode of the first transistor is connected to a second electrode of the driving transistor, and a second electrode of the first transistor is connected to a gate electrode of the driving transistor;
• a gate electrode of the second transistor is configured to receive a first light-emitting control signal, a first electrode of the second transistor is connected to the second electrode of the driving transistor, and a second electrode of the second transistor is connected to a first terminal of a light-emitting element;
• a gate electrode of the third transistor is configured to receive a second light-emitting control signal, a first electrode of the third transistor is connected to a first voltage terminal, and a second electrode of the third transistor is connected to a first electrode of the driving transistor;
• a gate electrode of the fourth transistor is configured to receive a reset control signal, a first electrode of the fourth transistor is configured to receive a reset voltage, and a second electrode of the fourth transistor is connected to the first terminal of the light-emitting element;
• a gate electrode of the fifth transistor is configured to receive a scanning signal, a first electrode of the fifth transistor is configured to receive a data signal, and a second electrode of the fifth transistor is connected to the first electrode of the driving transistor;
• a first terminal of the storage capacitor is connected to a second voltage terminal, and a second terminal of the storage capacitor is connected to the gate electrode of the driving transistor;
• and
• a second terminal of the light-emitting element is connected to a third voltage terminal,
• wherein the driving transistor is a polysilicon transistor, the first transistor is an oxide transistor, and a type of the first transistor is opposite to a type of the driving transistor;
• and
• the first transistor is configured to, under control of the compensation control signal, write the reset voltage to the gate electrode of the driving transistor in a case where the fourth transistor applies the reset voltage, and to write a compensation signal, which is based on the data signal, to the gate electrode of the driving transistor in a case where the fifth transistor writes the data signal.

A driving method for driving a pixel circuit,

• wherein the pixel circuit comprises:
• a reset circuit, a data writing circuit, a compensation circuit, and a driving circuit,
• the reset circuit is connected to a first terminal of a light-emitting element, and is configured to apply a reset voltage to the first terminal of the light-emitting element under control of a reset control signal to reset the first terminal of the light-emitting element;
• the data writing circuit is connected to a first terminal of the driving circuit, and is configured to write a data signal to the first terminal of the driving circuit under control of a scanning signal;
• the compensation circuit is connected to a second terminal and a control terminal of the driving circuit, and is configured to, under control of a compensation control signal, write the reset voltage into the control terminal of the driving circuit in a case where the reset circuit applies the reset voltage, and to write a compensation signal, which is based on the data signal, into the control terminal of the driving circuit in a case where the data writing circuit writes the data signal;
• and
• the driving circuit is configured to control a driving current for driving the light-emitting element to emit light under control of a voltage applied to the control terminal of the driving circuit,
• the driving method comprises:
• in a reset phase, applying the reset voltage to the first terminal of the light-emitting element by the reset circuit to reset the first terminal of the light-emitting element, and the reset circuit applying the reset voltage to the control terminal of the driving circuit via the compensation circuit to reset the control terminal of the driving circuit;
• in a charging phase, writing the data signal into the first terminal of the driving circuit by the data writing circuit, and writing the compensation signal, which is based on the data signal, into the control terminal of the driving circuit by the compensation circuit;
• and
• in a light-emitting phase, driving the light-emitting element to emit light by the driving circuit.