Pixel circuit, driving method thereof, display substrate and display apparatus

A pixel circuit, comprising:

• a first voltage terminal configured to be applied with a first voltage signal;
• a second voltage terminal configured to be applied with a second voltage signal;
• an initialization voltage terminal configured to be applied with an initialization voltage signal;
• a scan signal terminal configured to receive a scan signal;
• a data signal terminal configured to receive a data signal;
• a reset signal terminal configured to receive a reset signal;
• a light emitting signal terminal configured to receive a light emitting signal;
• a light emitting device, a storage capacitor, a driving unit, a first switching unit, a second switching unit, a third switching unit, a fourth switching unit, a fifth switching unit and a sixth switching unit,
• wherein:
• each of the switching units comprises a control terminal, a first signal terminal and a second signal terminal, the control terminal of the switching unit is operable to bring the first and second signal terminals into or out of conduction, and wherein the driving unit comprises a control terminal, a signal input terminal and a drive terminal, the control terminal and the signal input terminal of the driving unit is operable to control a drive signal outputted at the drive terminal;
• the control terminal of the driving unit, a first terminal of the storage capacitor, the first signal terminal of the first switching unit, the first signal terminal of the second switching unit and the control terminal of the third switching unit are connected to a first node;
• the control terminal of the second switching unit and the control terminal of the fifth switching unit are connected to the scan signal terminal, the second signal terminal of the second switching unit is connected with the first signal terminal of the third switching unit, the second signal terminal of the third switching unit is connected with the first signal terminal of the fifth switching unit, and the second signal terminal of the fifth switching unit is connected with the data signal terminal;
• the control terminal of the first switching unit and the control terminal of the sixth switching unit are connected to the reset signal terminal, and the second signal terminal of the first switching unit and the first signal terminal of the sixth switching unit are connected to the initialization voltage terminal;
• the control terminal of the fourth switching unit is connected to the light emitting signal terminal, a second terminal of the storage capacitor is connected to the first voltage signal terminal, a first terminal of the light emitting device and the second signal terminal of the sixth switching unit are connected to a second node, and a second terminal of the light emitting device is connected with the second voltage signal terminal;
• the signal input terminal and the drive terminal of the driving unit as well as the first signal terminal and the second signal terminal of the fourth switching unit are connected in series between the first voltage signal terminal and the second node, such that the driving unit and the fourth switching unit are connected in series between the first voltage signal terminal and the second node.