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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：US12299242B2
公开(公告)日：2025-05-13
申请号：US18517381
申请日：2023-11-22
Applicant: LG Display Co., Ltd.
Inventor： HoonBae Kim
IPC: G06F3/044 , G06F3/041 , G09G3/3233
Abstract: A touch display device including a touch power signal generation circuit includes a display panel having a driving voltage line and a base voltage line for driving a light emitting element, a plurality of touch electrodes, and a subpixel, a touch circuit applying a touch driving signal to the plurality of touch electrodes and detecting touch sensing according to a change in capacitance, a touch power signal generation circuit applying a touch power signal having the same phase and amplitude as the touch driving signal to the driving voltage line and the base voltage line during a touch driving period, and a timing controller controlling the touch circuit and the touch power signal generation circuit.
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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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Patent Agency Ranking
公开(公告)号：US11281333B2
公开(公告)日：2022-03-22
申请号：US17123467
申请日：2020-12-16
Applicant: LG Display Co., Ltd.
Inventor： CheolSe Kim , JuHan Kim , SeungSeok Oh , HoonBae Kim
IPC: G06F3/041
Abstract: In a touch display device with a touch sensor structure in which two or more touch electrodes located in two or more subareas are electrically connected to each other via one touch line, itis possible to decrease the number of touch channels. With a touch sensor structure in which two or more touch electrodes are connected to each touch line in a touch electrode connecting structure capable of removing ghost data, it is possible to improve touch sensitivity greatly.
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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：US11194201B2
公开(公告)日：2021-12-07
申请号：US15931401
申请日：2020-05-13
Applicant: LG Display Co., Ltd.
Inventor： SeongKyu Kang , SungChul Kim , HoonBae Kim , SunYeop Kim
IPC: G06F3/038 , G09G5/00 , G02F1/1362 , G09G3/36
Abstract: A display device includes a plurality of gate lines; a plurality of data lines; a plurality of pixel electrodes electrically connected with the plurality of data lines; a plurality of common electrodes corresponding to two or more pixel electrodes among the plurality of pixel electrodes; a data driving circuit outputting data voltages to the plurality of data lines; and a driving circuit outputting a first driving signal with a first voltage level to at least one common electrode among the plurality of common electrodes during a first driving period and a second driving signal with a second voltage level and a third voltage level to the at least one common electrode during a second driving period, the second driving signal being a pulse signal, wherein the second voltage level and the third voltage level differ from the first voltage level.
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公开(公告)号：US11023059B2
公开(公告)日：2021-06-01
申请号：US16124998
申请日：2018-09-07
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：US10936101B2
公开(公告)日：2021-03-02
申请号：US16453271
申请日：2019-06-26
Applicant: LG Display Co., Ltd.
Inventor： SungHoon Lee , Seungmok Shin , HoonBae Kim , SunYeop Kim
IPC: G06F3/041 , G06F3/0354 , G06F3/047
Abstract: A touch display device, a display controller, a driving circuit, and a driving method. Even in the case that a rate (or an input cycle) at which an image supply device supplies image data is not synchronized with a rate (or a beacon cycle) at which a beacon signal for pen sensing is output to the display panel, display processing and touch sensing (e.g., pen sensing or finger sensing) is performed ordinarily by controlling data output processing.
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