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公开(公告)号：US20230195249A1
公开(公告)日：2023-06-22
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 , H01L33/62 , G06F3/044 , H01L25/075
CPC classification number: G06F3/0412 , H01L33/62 , G06F3/0446 , H01L25/0753 , G06F3/0416
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：US11467685B2
公开(公告)日：2022-10-11
申请号：US17245652
申请日：2021-04-30
Applicant: LG Display Co., Ltd.
Inventor： HoonBae Kim , CheolSe Kim , SeungMok Shin , JuHan Kim , YongChan Park , HyunHo Park
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.
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公开(公告)号：US10860128B2
公开(公告)日：2020-12-08
申请号：US16448834
申请日：2019-06-21
Applicant: LG Display Co., Ltd.
Inventor： SeungMok Shin , CheolSe Kim , JuHan Kim , HoonBae Kim , HyunHo Park , Jinseong Kim , YongChan Park
Abstract: A touch display panel and device. A common electrode is provided between a display driving signal line and a touch line. The common electrode functions as a shielding pattern that prevents display noise of a touch sensing signal without increasing the number of masks used to form the touch display device. A touch load reducing layer is disposed in a region between the touch line and the common electrode, except for a region in which the common electrode and pixel electrodes overlap. This reduces the load of the touch line and improves touch sensing performance without having an adverse effect on display driving.
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公开(公告)号：US10802636B2
公开(公告)日：2020-10-13
申请号：US16439544
申请日：2019-06-12
Applicant: LG Display Co., Ltd.
Inventor： HoonBae Kim , CheolSe Kim , SungChul Kim , SunYeop Kim , Seongkyu Kang , SeungMok Shin , SungHoon Lee
Abstract: A touch display device and a method of driving the same. A transition value due to polarity inversion of a data voltage supplied to a predetermined number of adjacent subpixels is reduced by varying an inversion pattern by analysis of image data, so that fluctuations in the voltage of touch electrodes due to the transition of the data voltage are minimized. Accordingly, noise due to fluctuations in the voltage of the touch electrodes is removed so as to improve the performance of touch sensing performed in a period in which display driving is performed.
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公开(公告)号：US10725572B2
公开(公告)日：2020-07-28
申请号：US16197285
申请日：2018-11-20
Applicant: LG Display Co., Ltd.
Inventor： HoonBae Kim , CheolSe Kim , SangHyuck Bae
IPC: G06F3/041 , G06F3/044 , G06F3/0354
Abstract: The present embodiments relate to a touch display device, a touch system, a driving circuit, and a driving method. The touch display device may include a display panel configured to have a plurality of data lines, a plurality of gate lines, and a plurality of common electrodes, which are arranged thereon, and a driving circuit configured to supply an uplink signal to at least a subset of the plurality of common electrodes disposed in at least a first region of the display panel during the display blank period to enable the pen to detect the uplink signal when the pen is in contact with or is adjacent to the display panel.
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Patent Agency Ranking
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：US11921944B2
公开(公告)日：2024-03-05
申请号：US17942805
申请日：2022-09-12
Applicant: LG Display Co., Ltd.
Inventor： HoonBae Kim , CheolSe Kim , SeungMok Shin , JuHan Kim , YongChan Park , HyunHo Park
CPC classification number: G06F3/0412 , G06F3/04164 , G06F3/0443 , G06F3/047 , G09G3/2096 , G02F1/13338 , G02F1/13606 , G02F2201/123 , G06F2203/04107 , G09G2354/00
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.
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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：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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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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