FILTERING CIRCUIT AND TOUCH DISPLAY DEVICE

摘要

It is provided a filtering circuit and a touch display device. The touch display device includes: a substrate; a common electrode arranged on the substrate; a signal source configured to provide a display signal or a touch signal; a filter capacitor including a first terminal and a second terminal, where a fixed electric potential is applied to the second terminal of the filter capacitor; and a control switch arranged between a common electrode lead and the first terminal of the filter capacitor to electrically connect/disconnect the filter capacitor with/from the common electrode lead. In a case that the signal source provides a display signal, the control switch is switched on to electrically connect the filter capacitor with the first node. In a case that the signal source provides a touch signal, the control switch is switched off to electrically disconnect the filter capacitor from the first node.

主权项

1. A filtering circuit, comprising:
a signal source configured to provide a display signal or a touch signal; a first node electrically connected to the signal source; a filter capacitor including a first terminal and a second terminal, wherein a fixed electric potential is applied to the second terminal; and a control switch arranged between the first node and the first terminal of the filter capacitor to electrically connect the filter capacitor with the first node or electrically disconnect the filter capacitor from the first node.