公开(公告)号：US20170300165A1

公开(公告)日：2017-10-19

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

CPC classification number: G06F3/0416 ,  G06F3/0412 ,  G06F3/044 ,  G06F2203/04107 ,  G09G3/2092 ,  G09G2330/06

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.

公开(公告)号：US20180095597A1

公开(公告)日：2018-04-05

申请号：US15379954

申请日：2016-12-15

Applicant: LG DISPLAY CO., LTD.

Inventor： Youngho KWON ,  SungUk BYUN ,  MinWoo HWANG ,  Sangsoo LEE

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch display device includes a plurality of touch electrodes that are arranged outside or inside a display panel and a touch sensing circuit that outputs a touch driving signal to drive at least one of the plurality of touch electrodes and senses a touch or a touch position, the touch driving signal output in each touch section for the touch mode includes a plurality of waveforms to which a rectangular wave is modulated, and each of the plurality of waveforms includes one or more different amplitudes in a rising section and a falling section. Accordingly, it is possible to prevent electromagnetic interference (EMI).