公开(公告)号：US20180107315A1

公开(公告)日：2018-04-19

申请号：US15722994

申请日：2017-10-02

Applicant: LG Display Co., Ltd.

Inventor： HongJu LEE ,  HyeongWon KANG ,  Youngwoo JO

IPC: G06F3/041 ,  G06F3/044 ,  G02F1/1333 ,  G09G3/36 ,  G02F1/1362 ,  G02F1/1343

CPC classification number: G06F3/0412 ,  G02F1/13338 ,  G02F1/134309 ,  G02F1/136286 ,  G02F2201/121 ,  G02F2201/123 ,  G06F3/0416 ,  G06F3/0418 ,  G06F3/044 ,  G06F2203/04112 ,  G09G3/3677 ,  G09G3/3688 ,  G09G2310/027 ,  G09G2310/0286 ,  G09G2310/0289 ,  G09G2310/0291

Abstract: The present embodiments may provide a touch display device including: a display panel in which a plurality of data lines, a plurality of gate lines, and a plurality of touch electrodes are disposed; a gate-driving circuit configured to drive the plurality of gate lines; a data-driving circuit configured to drive the plurality of data lines; and a touch-driving circuit configured to drive the plurality of touch electrodes while the plurality of data lines and the plurality of gate lines are driven. In this touch display device, while a touch-driving signal swings with a predetermined amplitude, a data signal and a gate signal may also swing with the predetermined amplitude. According to the present embodiments, it is possible to enable high-speed image display and high-speed touch sensing, to perform a display operation and a touch operation simultaneously, and to display an image normally without any image change.

公开(公告)号：US20210200413A1

公开(公告)日：2021-07-01

申请号：US17113781

申请日：2020-12-07

Applicant: LG DISPLAY CO., LTD.

Inventor： HyunWoo JANG ,  JuneGun CHUNG ,  Youngwoo JO ,  HongJu LEE

IPC: G06F3/041 ,  G06F3/044

Abstract: Provided are a touch display device and a touch driving method thereof. Touch electrodes are grouped into a touch sensing block and non-touch blocks. The touch electrodes in the touch sensing block and the touch electrodes in the non-touch blocks are sensed at different sensing ratios. Power consumption is efficiently managed and sensitivity in touch sensing is maintained.

公开(公告)号：US20180173342A1

公开(公告)日：2018-06-21

申请号：US15844533

申请日：2017-12-16

Applicant: LG Display Co., Ltd.

Inventor： HongJu LEE ,  HyeongWon KANG ,  Youngwoo JO

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/0418

Abstract: The present disclosure relates to a touch circuit, a touch sensing device, and a touch sensing method. According to the present disclosure, it is possible to obtain an accurate touch sensing result (the presence or absence of a touch and/or a touch position) by compensating for the unintentional change in the quantity of the charge corresponding to a signal obtained by driving a touch screen panel, so as to obtain sensing data in which the influence of the parasitic capacitance generated inside or outside the touch screen panel is reduced or eliminated, thereby improving capacitance-based touch sensing performance.

公开(公告)号：US20210191555A1

公开(公告)日：2021-06-24

申请号：US17116530

申请日：2020-12-09

Applicant: LG Display Co., Ltd.

Inventor： Youngwoo JO ,  HyeongWon KANG

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

Abstract: Embodiments of the present disclosure relate to touch display devices, driving circuits, and driving methods, and more specifically, to a touch display device, a driving circuit, and a driving method for enabling the functionality of a micro control unit to be minimized and power consumption to be reduced by allowing one or more combined integrated circuits to generate a touch sensing control signal and provide the generated signal to a plurality of combined integrated circuits. Further, according to embodiments of the present disclosure, touch display devices, driving circuits, and driving methods are provided for enabling power consumption of a touch power integrated circuit to be reduced by using a touch sensing control signal generated by one or more combined integrated circuits as a load-free driving signal.

公开(公告)号：US20220057909A1

公开(公告)日：2022-02-24

申请号：US17395150

申请日：2021-08-05

Applicant: LG Display Co., Ltd.

Inventor： HongJu LEE ,  Youngwoo JO ,  HyunWoo JANG

IPC: G06F3/041 ,  G06F3/0354

Abstract: Discussed is a touch display device, including a display panel on which a touch screen panel including a plurality of touch electrodes is embedded, and a touch control unit configured to generate a pen detection signal corresponding to a pen driving signal of a stylus from a touch sensing signal transmitted from the display panel, and generate a touch driving signal synchronized with the pen driving signal of the stylus by using the pen detection signal.

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：US20190196650A1

公开(公告)日：2019-06-27

申请号：US16292141

申请日：2019-03-04

Applicant: LG Display Co., Ltd.

Inventor： KiYong KIM ,  Youngwoo JO

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G02F1/13338 ,  G06F3/0412 ,  G06F3/0418 ,  G06F3/044 ,  G06F2203/04107

Abstract: A display device having a built-in touchscreen and a driving chip, a circuit film, and a chip-on-film (COF) type driving circuit included in the display device. The COF type driving circuit performs data driving and touch driving in a combined manner. A source driving circuit outputs image data voltages through data channels. At least one touch driving circuit outputs touch driving signals through touch channels. The source driving circuit and the at least one touch driving circuit are mounted on an integrated circuit film. Data channel lines electrically connected to the data channels and touch channel lines electrically connected to the touch channels are disposed on the integrated circuit film. The noise avoidance line disposed on the integrated circuit film is located outward of an at least one outermost touch channel line.

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.

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：US20200210022A1

公开(公告)日：2020-07-02

申请号：US16712015

申请日：2019-12-12

Applicant: LG Display Co., Ltd.

Inventor： KiYong KIM ,  HyeongWon KANG ,  Youngwoo JO ,  HongJu LEE

IPC: G06F3/044

Abstract: A touch display device includes: a touch panel including N touch electrodes; a sensor sensing unit block including M sensor sensing units and to sense two or more touch electrodes among the N touch electrodes; a front multiplexer to select two or more touch electrodes from among the N touch electrodes and connect the selected touch electrodes to the sensor sensing unit block. The front multiplexer is configured to select M touch electrodes, which are disposed in a sensing active region corresponding to a first sensing period, from among the N touch electrodes, and to match and connect the M touch electrodes to the M sensor sensing units, wherein M is greater than or equal to 2, and N is greater than M. The M sensor sensing units are configured to simultaneously sense the M touch electrodes disposed in the sensing active region during the first sensing period.