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公开(公告)号：US20150185914A1
公开(公告)日：2015-07-02
申请号：US14482127
申请日：2014-09-10
Applicant: LG Display Co., Ltd.
Inventor： Sungsu HAN , Seongkyu KANG
IPC: G06F3/044
CPC classification number: G06F3/044 , G06F3/0412 , G06F3/0416 , G06F2203/04111
Abstract: A touch sensing system includes a touch screen including touch sensors and sensing lines, the touch sensors and the sensing lines being divided into first and second sensing areas, a first touch sensing integrated circuit (IC) sensing a touch input of the first sensing area using a signal received through receiving channels, a second touch sensing IC sensing a touch input of the second sensing area using a signal received through receiving channels separated from the receiving channels of the first touch sensing IC, differential amplifiers between the sensing lines and the receiving channels of the first and second touch sensing ICs, and a switch connecting a sensing line, which is closest to the first sensing area among the sensing lines of the second sensing area, to an Nth differential amplifier connected to a last receiving channel of the first touch sensing IC.
Abstract translation: 触摸感测系统包括触摸屏，包括触摸传感器和感测线，触摸传感器和感测线被分为第一和第二感测区域，第一触摸感测集成电路（IC），感测第一感测区域的触摸输入，使用 通过接收通道接收的信号，使用从第一触摸感测IC的接收通道分离的接收通道接收的信号感测第二感测区域的触摸输入的第二触摸感测IC，感测线路和接收通道之间的差分放大器 的第一和第二触摸感测IC，以及连接到第二感测区域的感测线中最靠近第一感测区域的感测线路的连接到连接到第一触摸的最后接收频道的第N差分放大器的开关 感测IC。
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公开(公告)号：US20210223938A1
公开(公告)日：2021-07-22
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
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：US20190384437A1
公开(公告)日：2019-12-19
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：US20210232256A1
公开(公告)日：2021-07-29
申请号：US17230838
申请日：2021-04-14
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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5.发明申请公开(公告)号：US20180150163A1
公开(公告)日：2018-05-31
申请号：US15803217
申请日：2017-11-03
Applicant: LG DISPLAY CO., LTD.
Inventor： YoungJoon LEE , HongChul KIM , SungYub LEE , Seongkyu KANG
CPC classification number: G06F3/0412 , G06F3/0416 , G06F3/044 , G06F2203/0338 , G06F2203/04112 , G06K9/0002 , G09G2310/0264
Abstract: A touch display device, a display panel, a touch-sensing method, a touch-sensing circuit, and a driving circuit, are discussed, which can detect a signal utilizing a pixel electrode and can remove a noise component that may be generated at the time of touch position sensing or fingerprint sensing while sensing a touch position or a fingerprint based on the detected signal, thereby improving sensing performance.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20180089487A1
公开(公告)日：2018-03-29
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：US20150138173A1
公开(公告)日：2015-05-21
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.
Abstract translation: 讨论了显示装置及其驱动方法。 显示装置包括：显示面板，包括与像素共同连接的公共电极;显示驱动电路，用于在垂直活动时间期间向像素施加数据电压;以及传感器驱动电路，其将手势感测驱动信号施加到公共电极 在垂直空白时间期间，并感测到手势输入。
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公开(公告)号：US20220137769A1
公开(公告)日：2022-05-05
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
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：US20220027012A1
公开(公告)日：2022-01-27
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：US20190384475A1
公开(公告)日：2019-12-19
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
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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