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公开(公告)号：US10788929B2
公开(公告)日：2020-09-29
申请号：US16504783
申请日：2019-07-08
Applicant: LG DISPLAY CO., LTD.
Inventor： SeungMok Shin , HoonBae Kim , SunYeop Kim , SungHoon Lee
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.
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公开(公告)号：US20130293498A1
公开(公告)日：2013-11-07
申请号：US13887507
申请日：2013-05-06
Applicant: LG DISPLAY CO., LTD.
Inventor： CheolSe Kim , HoonBae Kim
IPC: G09G3/36
CPC classification number: G09G3/3696 , G02F1/13338 , G02F1/134309 , G06F3/0412 , G06F3/0416 , G06F3/044
Abstract: Disclosed is an LCD device and a method of driving the same. The LCD device includes a liquid crystal panel configured to comprise a TFT substrate and a color filter substrate; a touch panel configured to comprise a plurality of driving electrodes and a plurality of receiving electrodes; a common voltage generator configured to generate a common voltage; a touch sensing unit configured to supply the common voltage to the driving electrodes and sequentially supply a driving voltage to scanned driving electrodes, corresponding to scanned gate lines to which a scan signal has been inputted for one frame period, to detect a touch; and a driving voltage generator configured to generate the driving voltage.
Abstract translation: 公开了一种LCD装置及其驱动方法。 LCD装置包括：液晶面板，被配置为包括TFT基板和滤色器基板; 触摸面板，被配置为包括多个驱动电极和多个接收电极; 配置为产生公共电压的公共电压发生器; 触摸感测单元，被配置为向驱动电极提供公共电压，并且对与扫描信号已经输入了一帧周期的扫描的栅极线对应的扫描驱动电极顺序地提供驱动电压，以检测触摸; 以及被配置为产生驱动电压的驱动电压发生器。
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公开(公告)号：US11914810B2
公开(公告)日：2024-02-27
申请号：US17574017
申请日：2022-01-12
Applicant: LG DISPLAY CO., LTD.
Inventor： HoonBae Kim , SungChul Kim , SunYeop Kim , Seongkyu Kang
IPC: G06F3/041 , G06F3/0354
CPC classification number: G06F3/04162 , G06F3/03545 , G06F3/0412
Abstract: A touch display device includes a first driving circuit supplying a gate signal to a part of a plurality of gate lines before a beacon period in which a beacon signal for an active stylus is generated, and a second driving circuit supplying the gate signal to another part of the plurality of gate lines after the beacon period ends, the touch display device and the driving method thereof may prevent display failure caused by the beacon signal for the active stylus.
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公开(公告)号：US11861091B2
公开(公告)日：2024-01-02
申请号：US17972448
申请日：2022-10-24
Applicant: LG Display Co., Ltd.
Inventor： CheolSe Kim , SungChul Kim , HoonBae Kim , SunYeop Kim , Jinseong Kim , JuHan Kim , Haewon Lee
IPC: G06F3/041 , G06F3/044 , H01L33/62 , H01L25/075
CPC classification number: G06F3/0412 , G06F3/0416 , G06F3/0446 , H01L25/0753 , H01L33/62
Abstract: A display device includes a substrate including a plurality of sub pixels; a first touch electrode on the substrate and overlapping at least one subpixel from the plurality of sub pixels; a second touch electrode on the substrate and spaced apart from the first touch electrode and overlapping the at least one sub pixel; an insulating layer covering the first touch electrode and the second touch electrode; a plurality of charging transistors on the insulating layer and electrically connected to one of the first touch electrode and the second touch electrode; a plurality of sensing transistors on the insulating layer and electrically connected to one of the first touch electrode and the second touch electrode; a planarization layer covering the plurality of charging transistors and the plurality of sensing transistors; and a light emitting diode on the planarization layer.
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公开(公告)号：US11797096B2
公开(公告)日：2023-10-24
申请号：US17850312
申请日：2022-06-27
Applicant: LG Display Co., Ltd.
Inventor： CheolSe Kim , HoonBae Kim , SunYeop Kim
CPC classification number: G06F3/016 , G06F3/0412 , G06F3/04184 , G09G3/2092 , G06F3/0443 , G09G3/3655 , G09G2310/0275 , G09G2310/08
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.
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Patent Agency Ranking
公开(公告)号：US11740737B2
公开(公告)日：2023-08-29
申请号：US17507631
申请日：2021-10-21
Applicant: LG Display Co., Ltd.
Inventor： Seongkyu Kang , SungChul Kim , HoonBae Kim , SunYeop Kim
CPC classification number: G06F3/04184 , G06F3/0412 , G06F3/0448 , G06F3/04166 , G09G3/20 , G09G2310/0291 , G09G2310/0297 , G09G2310/08
Abstract: Embodiments of the present disclosure relate to a touch display device, a touch driving circuit and a touch driving method thereof, and more particularly, a touch display device, a touch driving circuit and a touch driving method thereof enabling to reduce the distortion phenomenon of the common voltage caused by a load of the touch electrodes. In addition, embodiments of the present disclosure relate to a touch display device, a touch driving circuit and touch driving method thereof enabling reduction of the distortion phenomenon of the common voltage according to a structure of the touch electrodes. In addition, embodiments of the present disclosure relate to a touch display device, a touch driving circuit and touch driving method thereof enabling to reduce the distortion phenomenon of the common voltage generated in a driving process in which a display driving operation and a touch driving operation are alternated.
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公开(公告)号：US11650689B2
公开(公告)日：2023-05-16
申请号：US17230838
申请日：2021-04-14
Applicant: LG Display Co., Ltd.
Inventor： SungChul Kim , HoonBae Kim , SunYeop Kim , Seongkyu Kang
CPC classification number: G06F3/0416 , G06F3/0412 , G06F3/0446 , G09G3/3674 , G09G3/3685 , G09G2310/027 , G09G2310/0213 , G09G2310/08
Abstract: A touch display device, a driving circuit, and a driving method are provided. An image defect which occurs when display driving and touch driving are simultaneously executed can be reduced by performing control such that a voltage level of a touch electrode driving signal (TDS) varies in a section other than a high-level period (Pon) of an ON-clock signal (ON_CLK) and/or a high-level period (Poff) of an OFF-clock signal (OFF_CLK).
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公开(公告)号：US11379076B2
公开(公告)日：2022-07-05
申请号：US17224597
申请日：2021-04-07
Applicant: LG Display Co., Ltd.
Inventor： HoonBae Kim , CheolSe Kim , SungChul Kim , SunYeop Kim , Seongkyu Kang
IPC: G06F3/041 , G06F3/044 , G09G3/20 , G09G3/3266 , G09G3/3275 , G09G3/36
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.
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公开(公告)号：US11249582B2
公开(公告)日：2022-02-15
申请号：US16882363
申请日：2020-05-22
Applicant: LG Display Co., Ltd.
Inventor： HoonBae Kim , SungChul Kim , SunYeop Kim , Seongkyu Kang
IPC: G06F3/041 , G06F3/0354
Abstract: A touch display device includes a first driving circuit supplying a gate signal to a part of a plurality of gate lines before a beacon period in which a beacon signal for an active stylus is generated, and a second driving circuit supplying the gate signal to another part of the plurality of gate lines after the beacon period ends, the touch display device and the driving method thereof may prevent display failure caused by the beacon signal for the active stylus.
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公开(公告)号：US11231798B2
公开(公告)日：2022-01-25
申请号：US16883426
申请日：2020-05-26
Applicant: LG Display Co., Ltd.
Inventor： Seongkyu Kang , SungChul Kim , HoonBae Kim , SunYeop Kim
IPC: G06F3/041 , G09G3/36 , G09G3/3275 , G06F3/044 , G09G3/20
Abstract: Provided are a touchscreen display device, a touch driving circuit, and a driving method. Image display and touch sensing are simultaneously performed and the interference between display driving and touch driving are minimized or removed, so that excellent image display and touch sensing performance is obtained. Poor touch sensitivity occurring in a specific area (e.g. an edge area) is reduced by using differential sensing sequence control, internal correction resistors of the touch driving circuit, and signal characteristics control.
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