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公开(公告)号：US20200081573A1
公开(公告)日：2020-03-12
申请号：US16566604
申请日：2019-09-10
Applicant: LG DISPLAY CO., LTD.
Inventor： SungChul Kim , HoonBae Kim , SunYeop Kim , Seongkyu Kang
Abstract: A touch display panel and a touch display device are discussed. A data voltage, supplied to subpixels corresponding to a touch electrode, has a polarity pattern configured to minimize the cumulative transition value of the data voltage. Noise in touch sensing signals, caused by the transition of the data voltage, can be prevented, and touch sensing performance can be improved. A data voltage having polarities opposite to those of a previous frame is supplied in every specific frames, or some subpixels of a frame are set to have opposite polarities. Deteriorations in subpixels, caused by inversion driving for improving touch sensing performance, can be prevented.
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公开(公告)号：US20190384452A1
公开(公告)日：2019-12-19
申请号：US16438929
申请日：2019-06-12
Applicant: LG Display Co., Ltd.
Inventor： Seongkyu Kang , SungChul Kim , HoonBae Kim , SunYeop Kim
Abstract: A touch display device, a microcontroller, and a driving method. During touch driving, no phase difference is generated among a plurality of pulse signals generated by a display panel, a printed circuit board, etc. Unnecessary parasitic capacitance is prevented from occurring between a touch electrode, to which a touch-sensing driving signal is applied, and surrounding other electrodes. Touch sensing performance is improved, and display performance is improved.
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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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