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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：US10572709B2
公开(公告)日：2020-02-25
申请号：US15705965
申请日：2017-09-15
Applicant: LG DISPLAY CO., LTD.
Inventor： Seongkyu Kang , HongChul Kim , YoungJoon Lee , SungYub Lee
Abstract: A touch display device can sense a fingerprint touch using a pixel electrode and a data line. Before a capacitance variance of the pixel electrode in a fingerprint touch sensing interval is sensed, the voltage of only the data line is fixed to be identical to a voltage applied to a (+) terminal of an operational amplifier of a fingerprint touch sensing unit so that a capacitance variance of the data line is not transferred to the fingerprint touch sensing unit, and a capacitance variance of only the pixel electrode may be transferred. The capacitance variance of only the pixel electrode, not including the capacitance variance of the data line, is transferred to the fingerprint touch sensing unit so that the distinction between a peak and a valley of a fingerprint touching a display panel is enhanced. Therefore, a fingerprint touch sensing performance can be improved.
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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：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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公开(公告)号：US11768563B2
公开(公告)日：2023-09-26
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 , G06F3/0443 , G06F3/041662 , 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：US11526247B2
公开(公告)日：2022-12-13
申请号：US17350373
申请日：2021-06-17
Applicant: LG DISPLAY CO., LTD.
Inventor： HoonBae Kim , HyunWoo Jang , KiYong Kim , JaeKyu Park , Youngwoo Jo , SunChul Kim , SunYeop Kim , Seongkyu Kang
Abstract: Embodiments of the present disclosure relate to a touch display device, a touch circuit and a touch driving method thereof, and more particularly, a touch display device, a touch circuit and a touch driving method thereof enable to reduce effectively a ghost phenomenon in touch electrode groups by dividing a plurality of touch electrodes into a plurality of touch electrode groups with same patterns. The touch display device may include a display panel including a touch electrode group in which a plurality of long touch electrodes with long length and a plurality of short touch electrodes with short length in a first direction are alternately arranged in a second direction; and a touch circuit sequentially performing a self-capacitance sensing operation and a mutual-capacitance sensing operation for the touch electrode group.
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公开(公告)号：US11257452B2
公开(公告)日：2022-02-22
申请号：US16440187
申请日：2019-06-13
Applicant: LG Display Co., Ltd.
Inventor： SungChul Kim , CheolSe Kim , HoonBae Kim , SunYeop Kim , Seongkyu Kang
IPC: G09G3/36 , G02F1/1333 , G06F3/041
Abstract: The present disclosure relates to a touch display device, a touch sensing circuit, and a driving method. Further, the present disclosure relates to a touch display device, a touch sensing circuit, and a driving method, in which multiple touch electrodes are grouped into multiple touch electrode groups, and sensing is concurrently performed for each of the multiple touch electrode groups, so that excellent touch sensitivity and a fast touch sensing speed are allowed.
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公开(公告)号：US10002590B2
公开(公告)日：2018-06-19
申请号：US14457999
申请日：2014-08-12
Applicant: LG DISPLAY CO., LTD.
Inventor： Sanghyuck Bae , Juhan Kim , Jinseong Kim , Seongkyu Kang
CPC classification number: G09G5/18 , G02F2001/13312 , G06F3/017 , G06F3/0416 , G06F3/044 , G09G3/3275 , G09G3/3685 , G09G3/3688
Abstract: A display device and a method for driving the same are discussed. The display device includes a display panel including a common electrode commonly connected to pixels, a display driving circuit for applying a data voltage to the pixels during a vertical active time, and a sensor driving circuit which applies a gesture sensing driving signal to the common electrode during a vertical blank time and senses a gesture input.
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