公开(公告)号：EP3617853A1

公开(公告)日：2020-03-04

申请号：EP19184669.0

申请日：2019-07-05

Applicant: LG Display Co., Ltd.

Inventor： KIM, HoonBae ,  KIM, SunYeop ,  LEE, SungHoon ,  SHIN, SeungMok ,  KIM, SungChul ,  JO, Youngwoo ,  KANG, Seongkyu ,  LEE, HongJu

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

Abstract: A touch display device (200) comprising a display panel (DP) and a touch driver circuit (STIC) is configured to detect a touch by a finger (FG) or a pen (PEN) and to operate in a pen search mode (Fig. 13) and a local scan mode (Fig. 14), each mode comprising display and blank periods. The touch driver circuit (STIC) is configured to output a pen communications information signal (BCS) to touch electrodes (TE) for transmitting the pen communications information signal (BCS) to the pen (PEN) during blank periods of the pen search mode and to sense a pen output signal (POS) output by the pen (PEN) in response to the pen communications information signal (BCS) during the display periods.

公开(公告)号：EP3582092A1

公开(公告)日：2019-12-18

申请号：EP19180000.2

申请日：2019-06-13

Applicant: LG Display Co., Ltd.

Inventor： KIM, HoonBae ,  KIM, CheolSe ,  KIM, SungChul ,  KIM, SunYeop ,  KANG, Seongkyu ,  SHIN, SeungMok ,  LEE, SungHoon

IPC: G06F3/041 ,  G06F3/044 ,  G09G3/36

Abstract: A touch display device (100) and a method of driving the same. A transition value due to polarity inversion of a data voltage supplied to a predetermined number of adjacent subpixels is reduced by varying an inversion pattern by analysis of image data, so that fluctuations in the voltage of touch electrodes (TE) due to the transition of the data voltage are minimized. Accordingly, noise due to fluctuations in the voltage of the touch electrodes (TE) is removed so as to improve the performance of touch sensing performed in a period in which display driving is performed.