Pixel circuit, pixel driving method and organic light-emitting diode display device

A pixel circuit, comprising a data write-in circuit, a voltage amplification circuit, an energy storage circuit, a driving circuit and a light-emitting element, wherein

• the driving circuit comprises a control end, a first end and a second end;
• the data write-in circuit is connected to a gate line, a data line and a data write-in node, and configured to write a data voltage of the data line into the data write-in node under the control of the gate line;
• the voltage amplification circuit is connected to the data write-in node and the control end of the driving circuit, and configured to amplify the data voltage to acquire a driving voltage, and output the driving voltage to the control end of the driving circuit;
• the energy storage circuit is connected to the control end of the driving circuit, and configured to maintain a potential at the control end of the driving circuit;
• the first end of the driving circuit is connected to a power source voltage end, and the second end of the driving circuit is connected to an anode of the light-emitting element;
• the driving circuit is configured to control the power source voltage end to be electrically connected to, or electrically disconnected from, the anode of the light-emitting element under the control of the control end;
• and
• a cathode of the light-emitting element is connected to a cathode voltage end.