公开(公告)号：US10261628B2

公开(公告)日：2019-04-16

申请号：US15955490

申请日：2018-04-17

Applicant: LG Display Co., Ltd.

Inventor： KiYong Kim ,  Youngwoo Jo

IPC: G06F3/045 ,  G06F3/041 ,  G06F3/044 ,  G02F1/1333

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：US09817512B1

公开(公告)日：2017-11-14

申请号：US15391705

申请日：2016-12-27

Applicant: LG Display Co., Ltd.

Inventor： KiYong Kim ,  Youngwoo Jo

IPC: G06F3/045 ,  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：US20170003780A1

公开(公告)日：2017-01-05

申请号：US14983328

申请日：2015-12-29

Applicant: LG Display Co., Ltd.

Inventor： Sangyong Lee ,  Kyungjin Jang ,  Jaekyu Park ,  Youngwoo Jo

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0416 ,  G09G3/20

Abstract: A touch sensing circuit is configured to supply touch drive signals to electrodes of a touch sensitive display device and detect corresponding touch sense signals from the electrodes in response to the supplied touch drive signals, a touch sense signal indicating a change in self-capacitance of a driven electrode in response to a touch input on the driven electrode. The touch sensing circuit is further configured to integrate, for a first predetermined duration of time, a measure of each of the touch sense signals, to generate a first integrated signal corresponding to each touch sense signal; integrate, for a second predetermined duration of time, the first integrated signal, to generate a second integrated signal corresponding to each touch sense signal; and determine presence of one or more touch inputs on one or more of the electrodes based on the second integrated signal.

Abstract translation: 触摸感测电路被配置为向触摸敏感显示装置的电极提供触摸驱动信号，并响应于所提供的触摸驱动信号检测来自电极的相应的触摸感测信号，触摸感测信号指示电容的自身电容的变化 驱动电极响应于驱动电极上的触摸输入。 触摸感测电路还被配置为在第一预定持续时间内集成每个触摸感测信号的测量值，以产生对应于每个触摸感测信号的第一集成信号; 在第二预定持续时间内积分第一积分信号，以产生对应于每个触摸感测信号的第二积分信号; 并且基于第二积分信号确定一个或多个电极上的一个或多个触摸输入的存在。

公开(公告)号：US20230229251A1

公开(公告)日：2023-07-20

申请号：US18189067

申请日：2023-03-23

Applicant: LG Display Co., Ltd.

Inventor： HongJu Lee ,  HyeongWon Kang ,  Youngwoo Jo

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

CPC classification number: G06F3/0412 ,  G06F3/0418 ,  G02F1/13338 ,  G02F1/134309 ,  G02F1/136286 ,  G06F3/044 ,  G09G3/3677 ,  G09G3/3688 ,  G02F2201/121 ,  G02F2201/123 ,  G06F2203/04112 ,  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：US20230161437A1

公开(公告)日：2023-05-25

申请号：US17977752

申请日：2022-10-31

Applicant: LG Display Co., Ltd.

Inventor： Sojung Jung ,  Youngwoo Jo

IPC: G06F3/041

CPC classification number: G06F3/04164 ,  G06F3/04166 ,  G06F3/0446

Abstract: A touch driving circuit and a touch display device are disclosed. A plurality of channel switches for driving touch electrodes disposed in areas disposed symmetrically to each other may be simultaneously turned on to perform touch sensing in a state in which a plurality of touch lines electrically connected to the plurality of channel switches are short-circuited to each other. Accordingly, touch sensing may be performed using touch data in which a load deviation due to the touch lines according to areas in which the touch electrodes are disposed is reduced, thereby improving the performance of the touch sensing.

公开(公告)号：US11163398B2

公开(公告)日：2021-11-02

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：US10732769B2

公开(公告)日：2020-08-04

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

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：US20230168773A1

公开(公告)日：2023-06-01

申请号：US17966370

申请日：2022-10-14

Applicant: LG Display Co., Ltd.

Inventor： Sojung Jung ,  Youngwoo Jo

IPC: G06F3/041

CPC classification number: G06F3/0418 ,  G06F3/0412 ,  G09G3/20

Abstract: Embodiments of the present disclosure relate to a touch controller, a touch sensing system, and a touch display device. Among data communication periods between the touch controller and a touch driving circuit, during the data communication period included in a period in which a system clock signal is not output, a level of a communication control signal is changed a plurality of times, thereby allowing the touch driving circuit to recognize an address start time point. Therefore, it is possible to reduce power consumption of the touch sensing system by reducing a period in which the system clock signal is output and to improve the efficiency of data communication of the touch sensing system by enabling normal data communication in a period in which the system clock signal is not output.

公开(公告)号：US11650691B1

公开(公告)日：2023-05-16

申请号：US17977752

申请日：2022-10-31

Applicant: LG Display Co., Ltd.

Inventor： Sojung Jung ,  Youngwoo Jo

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/04164 ,  G06F3/04166 ,  G06F3/0446

Abstract: A touch driving circuit and a touch display device are disclosed. A plurality of channel switches for driving touch electrodes disposed in areas disposed symmetrically to each other may be simultaneously turned on to perform touch sensing in a state in which a plurality of touch lines electrically connected to the plurality of channel switches are short-circuited to each other. Accordingly, touch sensing may be performed using touch data in which a load deviation due to the touch lines according to areas in which the touch electrodes are disposed is reduced, thereby improving the performance of the touch sensing.

公开(公告)号：US11360620B2

公开(公告)日：2022-06-14

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.