Pixel circuit and driving method and display apparatus thereof

A pixel circuit, comprising:

• a reset unit connected to a first level end, a first scanning signal end, and a first node, and configured to cause a voltage of the first node to be equal to a voltage of the first level end under the control of a first scanning signal of the first scanning signal end;
• a driving unit connected to the first node, a second level end, and a third node, and configured to output a control voltage or a driving current via the third node under the control of the voltage of the first node and a voltage of the second level end;
• a control unit connected to a second scanning signal end, the first node, the third node, a third scanning signal end, a data signal end, a second node, and a third level end, and configured to cause a voltage of the second node to be equal to a voltage of the third level end and cause the voltage of the first node to be equal to the control voltage output by the third node under the control of a second scanning signal of the second scanning signal end, or cause a voltage of the data signal end to be equal to the voltage of the second node under the control of a third scanning signal of the third scanning signal end;
• an energy storage unit connected to the first node and the second node, and configured to store the voltage of the first node and the voltage of the second node;
• and
• a display unit connected to the third node, a fourth scanning signal end, and a fourth level end, and configured to display gray levels under the control of the driving current output by the third node, a fourth scanning signal of the fourth scanning signal end, and a voltage of the fourth level end.