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

A pixel circuit, comprising:

• a data signal writing module;
• a driving module;
• a threshold compensation transistor;
• a first power voltage writing module;
• and a light-emitting module, wherein the driving module comprises a driving transistor, wherein:
• the first power voltage writing module is connected to a first light-emitting control signal terminal, a first power voltage terminal, a source of the driving transistor and a gate of the driving transistor, and the first power voltage writing module is configured to write a first power voltage signal of the first power voltage terminal to the source of the driving transistor under control of a first light-emitting control signal of the first light-emitting control signal terminal;
• the data signal writing module is connected to a writing control terminal, a data signal terminal and the source of the driving transistor, and the data signal writing module is configured to transmit a data signal of the data signal terminal to the source of the driving transistor under control of a writing control signal of the writing control terminal;
• the threshold compensation transistor has a gate connected to a first node, a source connected to the gate of the driving transistor and a drain connected to a drain of the driving transistor, and the threshold compensation transistor is configured to perform voltage compensation to the gate of the driving transistor in case that the first node is at a valid level;
• and
• the light-emitting module has a first terminal connected to the drain of the driving transistor and a second terminal connected to a second power voltage terminal, and
• wherein:
• a driving stage of the pixel circuit comprises a first initialization phase and a second initialization phase;
• and in the second initialization phase, the first light-emitting control signal is at a second level, and a second light-emitting control signal is at a first level.