公开(公告)号：US20210191561A1

公开(公告)日：2021-06-24

申请号：US17119025

申请日：2020-12-11

Applicant: LG DISPLAY CO., LTD.

Inventor： HyongHwan KIM

IPC: G06F3/041 ,  G06F3/044

Abstract: Provided are a touch display device, a driver circuit, and a driving method. Combined integrated circuits generate a load-free common voltage supplied to touch electrodes during a touch sensing period, thereby preventing signal distortion and improving the performance of touch sensing. Gate driving integrated circuits generate a load-free gate low voltage supplied to gate lines during the touch sensing period, thereby preventing signal distortion and improving the performance of touch sensing.

公开(公告)号：US20190138150A1

公开(公告)日：2019-05-09

申请号：US16172169

申请日：2018-10-26

Applicant: LG Display Co., Ltd.

Inventor： HyongHwan KIM ,  HyeongWon KANG ,  Youngwoo JO

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0418 ,  G06F3/0412 ,  G06F3/04164 ,  G06F3/04166 ,  G06F3/044 ,  G06F3/0443 ,  G06F3/0445 ,  G06F3/0446

Abstract: The present embodiments relate to a touch display device and a touch driving circuit, which may detect a short circuit occurring between touch electrodes and between a plurality of touch lines. The touch display device comprises: a touch display panel in which touch electrodes and a plurality of touch lines are disposed, wherein the touch electrodes are divided into n multiplexer groups and each multiplexer group comprises m touch electrodes, and the plurality of touch lines correspond to and are electrically connected to the touch electrodes; a touch driving circuit comprising a multiplexer part and a pre-amplifying part, and configured to drive the touch electrodes, wherein the multiplexer part comprises m multiplexer circuits, and the pre-amplifying part comprises m pre-amplifiers; and a touch controller configured to detect an existence of a touch or a location of a touch performed by one or more of a finger and a pen.