公开(公告)号：US20230060098A1

公开(公告)日：2023-02-23

申请号：US17886521

申请日：2022-08-12

Applicant: Sharp Display Technology Corporation

Inventor： Kosuke NAGATA ,  Kazutoshi KIDA ,  Daiji KITAGAWA

IPC: G02F1/1333 ,  G06F3/041 ,  G06F3/044

Abstract: An in-cell touch panel includes a mode switching control circuit and a counter substrate electrode control circuit. The mode switching control circuit switches, in a time-division manner, the operation mode of the in-cell touch panel between a display mode in which a display signal is supplied by a display control circuit to pixel electrodes, and a touch detection mode in which a driving signal is supplied by a driving control circuit to touch sensor electrodes. The counter substrate electrode control circuit supplies a counter substrate electrode with a signal that is in synchronization with the driving signal and that has the same polarity as that of the driving signal in a period while the in-cell touch panel is in the touch detection mode, or causes the potential of the counter substrate electrode to be in a floating state in a period while the in-cell touch panel is in the touch detection mode.