Touch sensing circuit, touch sensing method, touch sensing panel and touch sensing display device

摘要

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.

主权项

1. A touch sensing circuit, comprising 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 define a plurality of pixel units, each of the pixel units is provided with a first switch tube and a second switch tube, the first switch tube is connected to the data lines, the second switch tube is connected to the signal transmission line, and the signal transmission line is connected to a signal processor which is used for judging whether a touch action is performed according to the change in a signal; wherein
the touch sensitive circuit further comprises a third switch tube, the third switch tube is connected in series between the first switch tube and the second switch tube; and a first node is formed at a junction of the first switch tube and the third switch tube, a second node is formed at a junction of the second switch tube and the third switch tube, a first fixed capacitor is formed between the first node and the common electrode, and a second variable capacitor is formed between the second node and the common electrode.