In cell touch display screen, driving method thereof and display device

The invention discloses an in cell touch display screen, a driving method of the in cell touch display screen and a display device. Every sub-pixel set consists of at least two sub-pixels, cathode layers of different sub-pixel sets are independent from each other, namely, a cathode layer which is arranged on the whole surface in the prior art is divided, and the cathode layers of the sub-pixel sets are connected with a driver chip through wires; the cathode layers are reused as self-capacitance touch control electrodes, the driver chip detects changes of capacitance values of the cathode layers through the wires to judge the touch control position, and therefore a touch control function is fulfilled. In addition, in the in cell touch display screen, signals outputted by the driver chip to the signal ends of sub-pixel circuits and the cathode layers in the fourth stage are formed in a mode that same touch control scanning signals are superposed on the basis of signals outputted in the third stage, and therefore the purpose that the working states of modules of the sub-pixel circuits are same to the working states in the third stage so as to ensure that normal display can be conducted can be achieved, and the in cell touch display screen based on an organic light emitting diode is obtained.