公开(公告)号：US20220027012A1

公开(公告)日：2022-01-27

申请号：US17350373

申请日：2021-06-17

Applicant: LG DISPLAY CO., LTD.

Inventor： HoonBae KIM ,  HyunWoo JANG ,  KiYong KIM ,  JaeKyu PARK ,  Youngwoo JO ,  SunChul KIM ,  SunYeop KIM ,  Seongkyu KANG

IPC: G06F3/044 ,  G06F3/041

Abstract: Embodiments of the present disclosure relate to a touch display device, a touch circuit and a touch driving method thereof, and more particularly, a touch display device, a touch circuit and a touch driving method thereof enable to reduce effectively a ghost phenomenon in touch electrode groups by dividing a plurality of touch electrodes into a plurality of touch electrode groups with same patterns. The touch display device may include a display panel including a touch electrode group in which a plurality of long touch electrodes with long length and a plurality of short touch electrodes with short length in a first direction are alternately arranged in a second direction; and a touch circuit sequentially performing a self-capacitance sensing operation and a mutual-capacitance sensing operation for the touch electrode group.

公开(公告)号：US20200278769A1

公开(公告)日：2020-09-03

申请号：US16875291

申请日：2020-05-15

Applicant: LG Display Co., Ltd.

Inventor： CheolSe KIM ,  HoonBae KIM ,  SunYeop KIM

IPC: G06F3/041 ,  G09G3/20 ,  G06F3/044 ,  G06F3/01

Abstract: Embodiments of the present disclosure relate to a touch display device, a driving method, and a driving circuit. More particularly, embodiments of the present disclosure relate to a touch display device, a driving method, and a driving circuit capable of preventing touch sensitivity from being affected by display driving even though simultaneously performing the display driving and touch driving by supplying a data voltage to a plurality of data lines disposed in a display panel, supplying a common voltage to a plurality of common electrodes disposed in the display panel, displaying an image through the display panel, and supplying a common voltage to the common electrodes.

公开(公告)号：US20190384475A1

公开(公告)日：2019-12-19

申请号：US16439366

申请日：2019-06-12

Applicant: LG Display Co., Ltd.

Inventor： HoonBae KIM ,  CheolSe KIM ,  SungChul KIM ,  SunYeop KIM ,  Seongkyu KANG

IPC: G06F3/041 ,  G09G3/20 ,  G06F3/044

Abstract: A touch display device, a data driving circuit, and a driving method are provided. The touch display device, the data driving circuit, and the driving method convert an image digital signal into an image analog signal in response to a gamma reference voltage which is applied to the touch electrodes arranged in the display panel and which is modulated in synchronization with a first touch electrode driving signal swinging with a first amplitude and output a data signal corresponding to the converted image analog signal to the data lines. Accordingly, it is possible to effectively simultaneously perform display and touch sensing.

公开(公告)号：US20190079623A1

公开(公告)日：2019-03-14

申请号：US16124998

申请日：2018-09-07

Applicant: LG Display Co., Ltd.

Inventor： HoonBae KIM ,  CheolSe KIM ,  SeungMok SHIN ,  JuHan KIM ,  YongChan PARK ,  HyunHo PARK

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/047 ,  G09G3/20

Abstract: Embodiments disclosed herein relate to a touch display panel and a touch display device. By arranging a shielding structure, which is connected to a touch electrode in a region where a touch line and a data line overlap each other or is applied with a shielding signal corresponding to a touch driving signal from an outside circuit, between the touch line and the data line, it is possible to prevent direct capacitance from being formed between the touch line and the data line, and to prevent the capacitance formed due to the data line from causing noise on a touch sensing signal. In addition, by arranging a touch load reduction layer between the shielding structure and the touch line, it is also possible to reduce the capacitance between the touch line and the data line arranged in the horizontal direction, thereby improving touch sensing performance.