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公开(公告)号：US11693516B2
公开(公告)日：2023-07-04
申请号：US17507465
申请日：2021-10-21
Applicant: LG DISPLAY CO., LTD.
Inventor： Sojung Jung
CPC classification number: G06F3/04184 , G06F3/0443 , G06F3/04166
Abstract: A touch display device may include a touch panel configured to be time-divisionally driven in touch sensing and display periods by a synchronization signal and including touch electrodes, and a touch driver to drive the touch panel. The touch driver may include: a touch sensing circuit to supply a touch driving signal to the touch electrodes, to receive an analog touch sensing signal from the touch electrodes, and to sample an integral value of the analog touch sensing signal to output a digital sensing data; a touch control circuit to generate a pulse width modulation (PWM) signal and to receive the digital sensing data to determine a touch; and a timing control circuit to provide an output signal to the touch sensing circuit to control a sampling timing of the integral value of the analog touch sensing signal.
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公开(公告)号：US11114039B2
公开(公告)日：2021-09-07
申请号：US16702922
申请日：2019-12-04
Applicant: LG Display Co., Ltd.
Inventor： Sojung Jung , Beom-Jin Kim , Bongchoon Kwak
IPC: G09G3/32 , G09G3/3291 , G02B27/01
Abstract: A micro-display device comprises a silicon substrate in which a plurality of gate lines, a plurality of data lines, a plurality of emission signal lines, and a plurality of subpixels are disposed; a gate driver circuit disposed on a first side of a pixel array to drive the plurality of gate lines; an emission driver circuit driving the plurality of emission signal lines and disposed on a second side of the pixel array different from the first side of the pixel array where the gate driver circuit is disposed; a data driver circuit disposed on a third side of the pixel array to drive the plurality of data lines; a memory storing duty data regarding duty ratios of an emission signal applied to the plurality of emission signal lines; and a control circuit controlling signals applied to the gate driver circuit, the data driver circuit and the emission driver circuit, wherein the control circuit is set to have different emission times with respect to subpixels connected to the plurality of emission signal lines according to the duty data stored in the memory.
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公开(公告)号：US20240211070A1
公开(公告)日：2024-06-27
申请号：US18501371
申请日：2023-11-03
Applicant: LG Display Co., Ltd.
Inventor： Sojung Jung
IPC: G06F3/041
CPC classification number: G06F3/04166
Abstract: A touch driving circuit is disclosed that transmits touch sensing data and identifies an address signal and a command signal to determine whether to maintain transmission of touch sensing data during a period while a touch controller transmits an address signal and a command signal to the touch driving circuit according to start of communication between the touch controller and the touch driving circuit. Thus, it is possible to reduce the transmission/reception time of touch sensing data and power consumption of the touch sensing system.
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公开(公告)号：US11868564B2
公开(公告)日：2024-01-09
申请号：US17966370
申请日：2022-10-14
Applicant: LG Display Co., Ltd.
Inventor： Sojung Jung , Youngwoo Jo
CPC classification number: G06F3/0418 , G06F3/0412 , G09G3/20
Abstract: Embodiments of the present disclosure relate to a touch controller, a touch sensing system, and a touch display device. Among data communication periods between the touch controller and a touch driving circuit, during the data communication period included in a period in which a system clock signal is not output, a level of a communication control signal is changed a plurality of times, thereby allowing the touch driving circuit to recognize an address start time point. Therefore, it is possible to reduce power consumption of the touch sensing system by reducing a period in which the system clock signal is output and to improve the efficiency of data communication of the touch sensing system by enabling normal data communication in a period in which the system clock signal is not output.
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5.发明申请公开(公告)号：US20220147185A1
公开(公告)日：2022-05-12
申请号：US17368339
申请日：2021-07-06
Applicant: LG Display Co., Ltd.
Inventor： Hyunwoo Kim , Jaehun Jun , Sojung Jung
IPC: G06F3/044 , G06F3/041 , G06F3/046 , G06F3/0354
Abstract: The present disclosure relates to a touch display device, a method of driving the touch display device, a touch driving circuit, and a touch controller, for sensing a touch using a touch driving signal whose frequency is changed in sync with a touch driving timing. According to the embodiments of the present disclosure, it is possible to have a high signal-to-noise ratio as well as improved immunity to the EMI, and acquire improved touch sensitivity.
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Patent Agency Ranking
公开(公告)号：US10692411B2
公开(公告)日：2020-06-23
申请号：US16224324
申请日：2018-12-18
Applicant: LG Display Co., Ltd.
Inventor： Beom-Jin Kim , Sunkyung Shin , Bongchoon Kwak , Sojung Jung
IPC: G06F3/038 , G09G3/00 , G09G3/3275 , G09G3/3266 , G09G3/3233
Abstract: The embodiments of the present disclosure relate to a display device, a test circuit, and a test method thereof. More specifically, a display device may include a silicon substrate having a plurality of gate lines, a plurality of data lines, a plurality of sensing lines, and a pixel array on which a plurality of subpixels are arranged; a test circuit arranged on the silicon substrate, the test circuit configured to select at least one line of the plurality of data lines or the plurality of sensing lines, to convert a signal transmitted through the selected line into a digital signal, and to output test data; and a test pad unit configured to output the test data to a circuit outside the silicon substrate.
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公开(公告)号：US20230161437A1
公开(公告)日：2023-05-25
申请号：US17977752
申请日：2022-10-31
Applicant: LG Display Co., Ltd.
Inventor： Sojung Jung , Youngwoo Jo
IPC: G06F3/041
CPC classification number: G06F3/04164 , G06F3/04166 , G06F3/0446
Abstract: A touch driving circuit and a touch display device are disclosed. A plurality of channel switches for driving touch electrodes disposed in areas disposed symmetrically to each other may be simultaneously turned on to perform touch sensing in a state in which a plurality of touch lines electrically connected to the plurality of channel switches are short-circuited to each other. Accordingly, touch sensing may be performed using touch data in which a load deviation due to the touch lines according to areas in which the touch electrodes are disposed is reduced, thereby improving the performance of the touch sensing.
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公开(公告)号：US10444882B2
公开(公告)日：2019-10-15
申请号：US15824095
申请日：2017-11-28
Applicant: LG DISPLAY CO., LTD.
Inventor： Sojung Jung
Abstract: Embodiments relate to a touch sensing circuit, a touch display device, and a touch sensing method. The touch sensing circuit may comprise a touch sensing process configured to output a touch driving signal during a touch sensing period to at least two touch electrodes, and to convert a touch sensing signal detected through each touch electrode, to which the touch driving signal is applied, during an analog-to-digital conversion period, into a digital sensing value, and a communication processor configured to transmit sensing data including the digital sensing value converted during the analog-to-digital conversion period to a touch controller, wherein the communication processor starts transmission of the sensing data including converted digital sensing values of at least some of touch sensing signals before each of touch sensing signals detected from the at least two touch electrodes are converted into a digital sensing value. The present invention enables quick touch sensing. In addition, noise generated in the touch information detection process can be reduced and the signal-to-noise ratio can be improved so that the touch sensitivity can be improved.
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公开(公告)号：US09927929B2
公开(公告)日：2018-03-27
申请号：US14528569
申请日：2014-10-30
Applicant: LG DISPLAY CO., LTD.
Inventor： Dongjo Park , Sojung Jung
CPC classification number: G06F3/044 , G06F3/0416 , G06F2203/04106
Abstract: A touch sensing system and a method for driving the same. The touch sensing system includes a pen with a resonant circuit embedded therein, XY electrodes including X electrodes and Y electrodes substantially perpendicular to the X electrodes, an antenna surrounding the XY electrodes, and a first touch driving circuit. The first touch driving circuit supplies a resonant inductive signal to the XY electrodes, analyzes a resonance signal received through the antenna, and decides a location and a pen pressure of the pen. The resonant inductive signal includes N periods each having a different duration, and wherein N is a positive integer equal to or greater than 2.
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公开(公告)号：US20150084899A1
公开(公告)日：2015-03-26
申请号：US14498254
申请日：2014-09-26
Applicant: LG DISPLAY CO., LTD.
Inventor： Dongjo Park , Sojung Jung
IPC: G06F3/0354 , G06F3/041
CPC classification number: G06F3/03545 , G06F3/041 , G06F3/044 , G06F3/046
Abstract: A touch sensing system includes a pen including a resonant circuit embedded therein, XY electrodes including X electrodes and Y electrodes perpendicular to the X electrodes, an antenna surrounding the XY electrodes, and a first touch driving circuit which transmits a resonant inductive signal to the pen through electric coupling and to receive a resonance signal from the pen through the antenna.
Abstract translation: 一种触摸感测系统，包括一个包括嵌入其中的谐振电路的笔，包括X电极和垂直于X电极的Y电极的XY电极，围绕着XY电极的天线，以及将谐振电感信号传输到笔的第一触摸驱动电路 并通过天线接收来自笔的共振信号。
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