A pixel circuit, comprising a selecting module, a writing module, a driving module, and a light emitting element, wherein
- a first control terminal of the selecting module is connected with a first node, a first input terminal of the selecting module is connected with a first power supply signal terminal, a second control terminal and a second input terminal of the selecting module are connected with a second power supply signal terminal, and an output terminal of the selecting module is connected with a second node;
- the selecting module is configured to select a signal from the first power supply signal terminal or a signal from the second power supply signal terminal and to output the selected signal to the second node under control of the first node and the second power supply signal terminal;
- a control terminal of the driving module is connected with the first node, an input terminal of the driving module is connected with the second node, and an output terminal of the driving module is connected with an input terminal of the light emitting element;
- the driving module is configured to drive, under control of the first node, the light emitting element to emit light by a signal inputted from the second node;
- an output terminal of the light emitting element is connected with a third power supply signal terminal;
- a first control terminal of the writing module is configured to receive a first control signal, a second control terminal of the writing module is configured to receive a second control signal, a first input terminal of the writing module is connected with a data signal terminal, a second input terminal of the writing module is connected with a reference signal terminal, a first output terminal of the writing module is connected with the first node, and a second output terminal of the writing module is connected with the input terminal of the light emitting element;
- the writing module is configured to write a signal from the data signal terminal to the first node under control of the first control signal, and to initialize, under control of the second control signal, the input terminal of the light emitting element by a signal inputted from the reference signal terminal.