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公开(公告)号：US20230229259A1
公开(公告)日：2023-07-20
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 , G06F3/0446 , G06F3/04164
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：US20220197474A1
公开(公告)日：2022-06-23
申请号：US17507631
申请日：2021-10-21
Applicant: LG Display Co., Ltd.
Inventor： Seongkyu Kang , SungChul Kim , HoonBae Kim , SunYeop Kim
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：US11144148B2
公开(公告)日：2021-10-12
申请号：US16881877
申请日：2020-05-22
Applicant: LG Display Co., Ltd.
Inventor： HoonBae Kim , SungChul Kim , SunYeop Kim , Seongkyu Kang
Abstract: Provided are a touchscreen display device, a touch driving circuit, and a pen touch sensing method. Sensing processing on a pen signal is performed in a different manner, depending on whether or not a gate line, through which a gate signal having a variable voltage is applied, overlaps with a common electrode selected as a sensing target. Even in the case in which an abnormal noise voltage is induced in the common electrode by panel interior noise while pen touch sensing is being performed during display driving, pen touch sensitivity is prevented from being reduced.
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公开(公告)号：US11144143B2
公开(公告)日：2021-10-12
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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Patent Agency Ranking
公开(公告)号：US10996791B2
公开(公告)日：2021-05-04
申请号：US16439366
申请日：2019-06-12
Applicant: LG Display Co., Ltd.
Inventor： HoonBae Kim , CheolSe Kim , SungChul Kim , SunYeop Kim , Seongkyu Kang
IPC: G06F3/041 , G09G3/20 , G06F3/044 , 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：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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28.发明授权公开(公告)号：US10429990B2
公开(公告)日：2019-10-01
申请号：US15916199
申请日：2018-03-08
Applicant: LG Display Co., Ltd.
Inventor： Seongkyu Kang , SungChul Kim
Abstract: A touch circuit, a display driver circuit, a touch display device, and a method of driving the same. After display driving is ended and before touch driving begins to be performed, touch driving and touch sensing are accurately performed through pre-setting driving without the influence of display driving that was ended already. An accurate touch sensing result without touch sensing noise is obtained.
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29.发明授权公开(公告)号：US09946399B2
公开(公告)日：2018-04-17
申请号：US15444105
申请日：2017-02-27
Applicant: LG Display Co., Ltd.
Inventor： Seongkyu Kang , SungChul Kim
CPC classification number: G06F3/0416 , G06F3/0412 , G06F3/0418 , G06F3/044 , G09G5/006 , G09G2300/0413 , G09G2310/0245 , G09G2310/0275 , G09G2310/0297 , G09G2310/08
Abstract: A touch circuit, a display driver circuit, a touch display device, and a method of driving the same. After display driving is ended and before touch driving begins to be performed, touch driving and touch sensing are accurately performed through pre-setting driving without the influence of display driving that was ended already. An accurate touch sensing result without touch sensing noise is obtained.
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