Abstract: The present invention provides a circuit, a method, a panel and a display device of touch sensing. The touch sensing circuit comprises a first gate line, a second gate line, data lines, a signal transmission line and a common electrode, the first gate line, the second gate line and the data lines defining a plurality of pixel units, each of the pixel units is provided therein with a first switch tube, a second switch tube and a third switch tube, and the signal transmission line being connected to a signal processor; the third switch tube is connected in series between the first switch tube and the second switch tube. The present invention improves the sensitivity of touch sensing.

Abstract: The invention provides a touch sensing circuit and method, a touch screen and a display device, the touch sensing circuit comprises: a touch sensing unit, an output control unit and a detection unit; the touch sensing unit is configured for providing a touch current, and transmitting the touch current to the output control unit; the output control unit is connected with a second control line, a read-out line, the touch sensing unit and the detection unit, for outputting the touch current to the detection unit; the detection unit is connected with a reference voltage terminal, an output terminal, the read-out line and the output control unit, for detecting significant change in the voltage output by the output control unit, thereby determining the location where the touch occurs. The detection accuracy of the detection sensing circuit in determining the occurrence of touch is improved.