The pixel circuit according to an embodiment of the present disclosure may include: a display driving module, arranged to compensate for the voltage threshold of the driving transistor by a data signal inputted by the data line and a first signal inputted by the first signal source in a time period, which is under a control of a first scanning signal inputted by the first scanning line, a second scanning signal inputted by the second scanning line, and a control signal inputted by the control line, so that a light-emitting driving signal of the OLED is independent of the voltage threshold of the driving transistor, within a fourth stage of the time period; and an in-cell touch detection module, arranged to detect a touch signal of a touch screen based on a variation of light caused by a touch operation in the time period, which is under the control of the first scanning signal and the control signal.