公开(公告)号：US10042470B2

公开(公告)日：2018-08-07

申请号：US15393125

申请日：2016-12-28

Applicant: LG Display Co., Ltd.

Inventor： MyungHo Shin ,  SungUk Byun ,  YongWoo Choi ,  MinWoo Hwang ,  KiYong Kim ,  Youngho Kwon ,  Kyungjin Jang ,  JaeKyu Park

IPC: G06F3/041 ,  G09G3/20 ,  G06F3/044

Abstract: A touch sensing method, a touch sensing circuit, and a touch display device perform multifrequency touch driving by varying the frequencies of touch driving signals when sensing a touch or a touched position by outputting pulse-type touch driving by which one or more touch electrodes among a number of touch electrodes disposed on a display panel are driven sequentially. Undesired parasitic capacitance that would otherwise be caused by touch driving signals is prevented from occurring, and EMI influence is reduced.