Pixel circuit, a driving method thereof and a display apparatus

A pixel circuit, comprising:

• a resetting sub-circuit, connected to a first signal terminal, a first voltage terminal, a second signal terminal, a first node, a second node and a third node, and configured to control potentials of the first node, the second node and the third node according to inputting signals of the first signal terminal and the second signal terminal;
• a charging sub-circuit, connected to the second signal terminal and the second node, and configured to control a potential of the second node according to an inputting signal of the second signal terminal;
• a compensating sub-circuit, connected to the second node, the first node, the second voltage terminal, the third node, a fourth node, a third voltage terminal, a third signal terminal, a fifth node and a sixth node, and configured to control the potentials of the first node and the third node according to an inputting signal of the third signal terminal and the potential of the second node;
• a reading sub-circuit, connected to a first terminal of a light-emitting device which has its second terminal connected to the ground, wherein the reading sub-circuit is connected to the first voltage terminal, the fourth signal terminal, the fourth node, the fifth node, the sixth node and a reading terminal and configured to control outputting signals of the first terminal of the light emitting device and the reading terminal according to the inputting signal of the fourth signal terminal.