Pixel circuit and display apparatus

A pixel circuit comprising a charging sub-circuit, a driving sub-circuit, a reset circuit and a light-emitting control sub-circuit;

• wherein the driving sub-circuit comprises a reference signal source, a driving transistor, a capacitor and a light-emitting device;
• one terminal of the capacitor is connected to a gate of the driving transistor, and the other terminal of the capacitor is connected to an output terminal of the reference signal source;
• a first terminal of the light-emitting control sub-circuit is connected to the output terminal of the reference signal source, a second terminal of the light-emitting control sub-circuit is connected to a source of the driving transistor, a third terminal of the light-emitting control sub-circuit is connected to one terminal of the light-emitting device, and a fourth terminal of the light-emitting control sub-circuit is connected to a drain of the driving transistor;
• a first terminal of the charging sub-circuit is connected to the source of the driving transistor, a second terminal of the charging sub-circuit is connected to the drain of the driving transistor, and a third terminal of the charging sub-circuit is connected to the gate of the driving transistor;
• the reset circuit comprises a reset signal source and a reset transistor, a source of the reset transistor is connected to the reference signal source, a drain of the reset transistor is connected to the gate of the driving transistor, and a gate of the reset transistor is connected to the reset signal source;
• wherein the charging sub-circuit is used for charging the capacitor of the driving sub-circuit in a data writing phase, the light-emitting control sub-circuit is used for controlling the driving sub-circuit to be turned on so as to drive the light-emitting device to emit light in a light emitting phase;
• wherein the reset transistor is turned on under the control of a reset signal from the reset signal source in a resetting phase, and so as to discharge the capacitor and reset the potential at the gate of the driving transistor to the reference signal source;
• wherein during the resetting phase and the data writing phase, the output terminal of the reference signal source is at a ground potential GND, and during the light emitting phase, the output terminal of the reference signal source is at a first level different from the ground potential GND.