公开(公告)号：US20190384437A1

公开(公告)日：2019-12-19

申请号：US16439544

申请日：2019-06-12

Applicant: LG Display Co., Ltd.

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

IPC: G06F3/041 ,  G06F3/047 ,  G06F3/044

Abstract: A touch display device 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 due to the transition of the data voltage are minimized. Accordingly, noise due to fluctuations in the voltage of the touch electrodes is removed so as to improve the performance of touch sensing performed in a period in which display driving is performed.

公开(公告)号：US20200073530A1

公开(公告)日：2020-03-05

申请号：US16460697

申请日：2019-07-02

Applicant: LG Display Co., Ltd.

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

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

Abstract: A touch display device accurately distinguishes a touch input performed using a finger and a touch input performed using a pen, such as a stylus, significantly reduce a touch sensing time, simultaneously perform a display operation and a touch sensing operation, and operate in a power saving manner. Touch sensing does not restrict an image display time of a display panel. Touch inputs are sensed without degradation in touch performance, which would otherwise be caused by parasitic capacitance occurring in electrodes within the display panel, such as data lines or gate lines.

公开(公告)号：US20200019270A1

公开(公告)日：2020-01-16

申请号：US16504783

申请日：2019-07-08

Applicant: LG DISPLAY CO., LTD.

Inventor： SeungMok SHIN ,  HoonBae KIM ,  SunYeop KIM ,  SungHoon LEE

IPC: G06F3/041 ,  G06F1/26 ,  G06F3/044

Abstract: The present disclosure relates to touch display panels and touch display devices. More specifically, the touch display panels and touch display devices provided are capable of performing display driving and touch driving simultaneously or together through a ground modulation scheme. Further, by separating a power source for driving a display controller D-CTR from a power source for driving a touch controller T-CTR, and controlling respective power sources independently, it is possible to reduce power consumption. Also, by enabling a power source for driving a ground modulation circuit to be variable, it is possible to provide functions based on touch sensing under a condition of reduced power consumption.