Pixel circuit, driving method thereof and display device

A pixel circuit, comprising:

• a first resetting sub-circuit, a first data writing sub-circuit, a charging and discharging sub-circuit, a first output control sub-circuit and a switch sub-circuit, wherein the first resetting sub-circuit, the charging and discharging sub-circuit and the first output control sub-circuit are coupled to a first node, and the first resetting sub-circuit, the first data writing sub-circuit and the charging and discharging sub-circuit are coupled to a second node;
• the first resetting sub-circuit is configured to write a reference voltage and an initialization voltage to the first node and the second node, respectively, in response to control of a signal of a reset signal line;
• the first data writing sub-circuit is configured to write a first data voltage to the second node in response to control of a signal of a gate line;
• the first output control sub-circuit is configured to form an electrical path between the charging and discharging sub-circuit and a charging and discharging terminal, and provide a voltage at the first node to the switch sub-circuit in response to control of a signal of a control signal line;
• the charging and discharging sub-circuit is configured to charge or discharge the first node in response to control of the first data voltage;
• the switch sub-circuit is coupled to a signal supply terminal and an element to be driven, and is configured to control, in response to control of the voltage at the first node provided by the first output control sub-circuit, electrical coupling and decoupling between the signal supply terminal and the element to be driven.