公开(公告)号：US11175766B2

公开(公告)日：2021-11-16

申请号：US16212124

申请日：2018-12-06

Applicant: LG Display Co., Ltd.

Inventor： ChangHwan Seo ,  NamKyun Cho ,  SeungChul Park ,  Eunji Seo

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/0354 ,  G06F3/038 ,  G06F3/033

Abstract: Disclosed is a display apparatus capable of sensing a pen touch without malfunction even when a user's hand or palm touches the display apparatus. The display apparatus includes a touch driving circuit dividing a plurality of touch electrodes arranged in a display panel into a plurality of touch groups, supplying a common voltage to the plurality of touch electrodes at each of a plurality of display periods, and sensing a position of a touch pen through some of the plurality of touch electrodes at each of a plurality of pen sensing periods, wherein the touch driving circuit supplies an uplink signal to some of the plurality of touch groups at each of at least one pen position sensing period among the plurality of pen sensing periods and senses a downlink signal transmitted from the touch pen through the touch groups to which the uplink signal has been supplied to generate pen touch raw data.