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公开(公告)号：US20250021189A1
公开(公告)日：2025-01-16
申请号：US18676278
申请日：2024-05-28
Applicant: LG Display Co., Ltd.
Inventor： Sangkyu Kim , DeukSu Lee , SungChul Kim , SeungRok Shin , Taeyun Kim
Abstract: A touch display device and a touch driving method are presented herein. The touch display device includes a display panel having a plurality of touch electrodes, a drive circuit configured to drive the display panel, a touch circuit configured to detect a position of a stylus relative to the display panel using a downlink signal transmitted from the stylus, and a timing controller configured to control the drive circuit and the touch circuit. During a blank period while operating in a global uplink mode, the touch circuit supplies a global uplink signal to an entirety of the display panel. During a display-driving period while operating in a local uplink mode, the touch circuit supplies a plurality of local uplink signals having different phases to a plurality of regions of the display panel.
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公开(公告)号：US12093485B2
公开(公告)日：2024-09-17
申请号：US17972467
申请日：2022-10-24
Applicant: LG Display Co., Ltd.
Inventor： SunYeop Kim , SungChul Kim , HoonBae Kim , Seongkyu Kang
CPC classification number: G06F3/0418 , G06F3/04164 , G06F3/0446
Abstract: Embodiments of the disclosure relate to a touch display device, a touch driving circuit, and a touch driving method. Specifically, a touch display device comprises a display panel including a plurality of touch electrodes, a gate driving circuit configured to supply a plurality of scan signals to the display panel through a plurality of gate lines, a touch driving circuit configured to detect touch according to a change in capacitance of the plurality of touch electrodes, and a power management circuit configured to supply a different level of compensation voltages to the plurality of touch electrodes in each of an overlap distortion period in a display driving period, a transition distortion period of the display driving period, and a touch driving period.
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公开(公告)号：US20230214060A1
公开(公告)日：2023-07-06
申请号：US17972461
申请日：2022-10-24
Applicant: LG Display Co., Ltd.
Inventor： SunYeop Kim , SungChul Kim , HoonBae Kim , Junghan Lee , Seongkyu Kang
CPC classification number: G06F3/04184 , G06F3/0412 , G06F3/041662 , G06F3/0443 , G06F2203/04106
Abstract: A touch display device includes a display controller configured to output a control signal and a first touch synchronization signal defining a display period and a touch period, a gate driving circuit configured to receive a high-level gate voltage and the control signal, and output a gate voltage pulse, a display panel comprising gate lines to which the gate voltage pulse is input and sub-pixels, a touch controller configured to receive the first touch synchronization signal, and output a pulse width modulation signal, and a touch power circuit configured to output a voltage generated based on the pulse width modulation signal to the gate driving circuit in at least a first period of the touch period, and output the high-level gate voltage to the gate driving circuit based on a second touch synchronization signal that defines a pseudo display period in a second period of the touch period.
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公开(公告)号：US11467679B2
公开(公告)日：2022-10-11
申请号：US14959337
申请日：2015-12-04
Applicant: LG DISPLAY CO., LTD.
Inventor： Suyun Ju , SungChul Kim , SangHyuck Bae , Sungsu Han , DoYoung Jung
IPC: G06F3/038 , G06F3/0354 , G06F3/041 , G06F3/044
Abstract: Disclosed is a touch screen device for transmitting button manipulation information based on a touch pen without using a separate wireless communication module. The touch screen device includes a touch screen including a plurality of touch electrodes, a touch driving circuit applying a touch electrode driving signal to the plurality of touch electrodes, and a touch pen receiving the touch electrode driving signal applied to the plurality of touch electrodes and transmitting a pen output signal to the touch screen in response to the received touch electrode driving signal. The touch pen includes at least one button, and when a user manipulates the at least one button, the touch pen adjusts the pen output signal.
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公开(公告)号：US11036331B2
公开(公告)日：2021-06-15
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 , G06F3/044 , G06F3/0354 , 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.
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Patent Agency Ranking
公开(公告)号：US11003278B2
公开(公告)日：2021-05-11
申请号：US16710829
申请日：2019-12-11
Applicant: LG Display Co., Ltd.
Inventor： SungChul Kim , HoonBae Kim , SunYeop Kim , Seongkyu Kang
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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17.发明授权公开(公告)号：US10444913B2
公开(公告)日：2019-10-15
申请号：US15480301
申请日：2017-04-05
Applicant: LG Display Co., Ltd.
Inventor： Sungsu Han , YongChan Park , SungChul Kim , Jinseong Kim
Abstract: The present embodiments relate to a driving circuit and a touch display apparatus for sensing a user's touch position and touch force with respect to a display panel, and further relate to a driving method thereof. The touch display apparatus may include a plurality of first electrodes that are configured to be embedded in a display panel, and a second electrode that is configured to be positioned outside the display panel. The touch display apparatus may read a force sensing signal from the second electrode through a signal detecting unit that is electrically connected to the second electrode. Therefore, it is possible to sense a touch force without separating a force sensing signal from a signal received from the first electrode, and to sense a user's touch force through the driving of the second electrode regardless of the driving mode of the first electrode.
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公开(公告)号：US10324324B2
公开(公告)日：2019-06-18
申请号：US15669872
申请日：2017-08-04
Applicant: LG Display Co., Ltd.
Inventor： SungChul Kim , HyungUk Jang , SangHyuck Bae , Sungsu Han , Suyun Ju , DoYoung Jung
IPC: G06F3/041 , G02F1/1333 , G06F3/044 , G02F1/1343
Abstract: Exemplary embodiments of the present invention relate to a touch technology, and more specifically, to a signal control circuit, a power control circuit, a drive circuit, a timing controller, a touch system, and a touch sensitive display device and a driving method thereof that can simply swing various voltages in a display device for a touch mode period by using a modulated ground voltage obtained by swinging a ground voltage, thereby effectively providing touch driving and preventing unnecessary parasitic capacitance from being generated not only in an active area but also in all other areas.
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19.发明授权公开(公告)号：US09229589B2
公开(公告)日：2016-01-05
申请号：US13714083
申请日：2012-12-13
Applicant: LG Display Co., Ltd.
Inventor： Junghan Lee , SungChul Kim
CPC classification number: G06F3/044 , G06F3/041 , G06F3/0412 , G06F3/0416 , G06F3/0418 , G06F2203/04101 , G09G3/36 , G09G3/3674 , G09G3/3677 , G09G3/3685 , G09G3/3688 , G09G3/3696 , G09G2310/0272 , G09G2310/0278
Abstract: A display device with an integrated touch screen including a display panel including electrodes divided into a plurality of block type groups and a plurality of data lines; a display driver IC configured to apply a common voltage to the electrodes when a driving mode of the panel is a display driving mode, sequentially apply a touch scan signal to each block type group when the driving mode of the panel is a touch driving mode, and apply a data signal to the data lines associated with a corresponding block type group when the touch scan signal is applied to the corresponding block type group; and a touch IC configured to generate the touch scan signal and apply the touch scan signal to the display driver IC.
Abstract translation: 一种具有集成触摸屏的显示装置，包括：显示面板，包括分为多个块类型组和多个数据线的电极; 配置为当面板的驱动模式为显示驱动模式时向电极施加公共电压的显示驱动器IC，当面板的驱动模式为触摸驱动模式时，顺序地向每个块类型组施加触摸扫描信号， 并且当将触摸扫描信号应用于对应的块类型组时，将数据信号应用于与相应块类型组相关联的数据线; 以及配置为产生触摸扫描信号并将触摸扫描信号施加到显示驱动器IC的触摸IC。
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公开(公告)号：US20250081794A1
公开(公告)日：2025-03-06
申请号：US18789033
申请日：2024-07-30
Applicant: LG Display Co., Ltd.
Inventor： SungChul Kim , JuHan Kim , Jinseong Kim , Haewon Lee
IPC: H10K59/40 , G06F3/041 , H10K59/131 , H10K59/35
Abstract: A touch display device comprises: a display panel including a substrate having a first area in a center of the substrate and a second area that surrounds the first area, a plurality of first pixels in the first area of the substrate, and a plurality of second pixels in the second area of the substrate; and a touch sensor on the display panel, the touch sensor configured to sense touch and includes a plurality of first sensing electrodes in the first area and a plurality of second sensing electrodes in the second area. The plurality of first pixels and the plurality of second pixels have different densities, and the plurality of first sensing electrodes and the plurality of second sensing electrodes have different densities.
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