公开(公告)号：US20170329167A1

公开(公告)日：2017-11-16

申请号：US15669872

申请日：2017-08-04

Applicant: LG Display Co., Ltd.

Inventor： SungChul Kim ,  HyungUk Jang ,  SangHyuck Bae ,  Sungsu Han ,  Suyun Ju ,  DoYoung Jung

IPC: G02F1/1333 ,  G02F1/1343 ,  G06F3/041 ,  G06F3/044

CPC classification number: G02F1/13338 ,  G02F1/1343 ,  G06F3/041 ,  G06F3/0412 ,  G06F3/0418 ,  G06F3/044 ,  G06F2203/04112

Abstract: Exemplary embodiments of the present invention relate to a touch technology, and more specifically, to a signal control circuit, a power control circuit, a drive circuit, a timing controller, a touch system, and a touch sensitive display device and a driving method thereof that can simply swing various voltages in a display device for a touch mode period by using a modulated ground voltage obtained by swinging a ground voltage, thereby effectively providing touch driving and preventing unnecessary parasitic capacitance from being generated not only in an active area but also in all other areas.

公开(公告)号：US09715137B2

公开(公告)日：2017-07-25

申请号：US14980174

申请日：2015-12-28

Applicant: LG Display Co., Ltd.

Inventor： JinSeong Kim ,  CheolSe Kim ,  JuHan Kim ,  SungChul Kim ,  SangHyuck Bae

IPC: G02F1/1333 ,  G02F1/1335 ,  G02F1/1362 ,  G02F1/1368 ,  G06F3/041 ,  G06F3/044

CPC classification number: G02F1/13338 ,  G02F1/136286 ,  G06F3/0412 ,  G06F3/044 ,  G06F2203/04103

Abstract: A liquid crystal display (LCD) device includes a lower substrate and an upper substrate disposed to face each other and having a liquid crystal layer interposed therebetween, black matrices provided on the lower substrate, a color filter provided between the black matrices, and a common electrode provided on the entire surface of the lower substrate, a gate line and a data line provided on the upper substrate and intersect with each other to define a pixel area, a thin film transistor (TFT) present in the pixel area of the upper substrate, and a pixel electrode electrically in contact with the TFT, wherein a sensing signal is output by detecting a change in self-capacitance between a touch object contacting the upper substrate and the gate line and the data line.

公开(公告)号：US20170102825A1

公开(公告)日：2017-04-13

申请号：US14984657

申请日：2015-12-30

Applicant: LG Display Co., Ltd.

Inventor： SungChul Kim ,  HyungUk Jang ,  SangHyuck Bae ,  Sungsu Han ,  Suyun Ju ,  DoYoung Jung

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G02F1/13338 ,  G02F1/1343 ,  G06F3/041 ,  G06F3/0412 ,  G06F3/0418 ,  G06F3/044 ,  G06F2203/04112

Abstract: Exemplary embodiments of the present invention relate to a touch technology, and more specifically, to a signal control circuit, a power control circuit, a drive circuit, a timing controller, a touch system, and a touch sensitive display device and a driving method thereof that can simply swing various voltages in a display device for a touch mode period by using a modulated ground voltage obtained by swinging a ground voltage, thereby effectively providing touch driving and preventing unnecessary parasitic capacitance from being generated not only in an active area but also in all other areas.

公开(公告)号：US09575592B1

公开(公告)日：2017-02-21

申请号：US14877543

申请日：2015-10-07

Applicant: LG Display Co., Ltd.

Inventor： SungChul Kim

IPC: G06F3/041 ,  G06F3/044 ,  G09G3/20

CPC classification number: G06F3/0416 ,  G06F3/044 ,  G06F2203/04101 ,  G06F2203/04103 ,  G09G3/2092 ,  G09G3/3648 ,  G09G3/3688 ,  G09G2310/0248 ,  G09G2310/0275 ,  G09G2310/08 ,  G09G2330/028 ,  G09G2354/00

Abstract: Disclosed is a display device including: a display panel including data lines and gate lines; a touch screen including a plurality of touch screens; a data driving circuit for supplying a data voltage to the data lines; a gate driving circuit for supplying a gate voltage to the gate lines; a touch sensing circuit for applying a driving signal to the touch sensors to sense a change in a voltage or a capacitance value of the touch sensors; and a timing controller for time-dividing a first frame period into a first driving period for sensing the touch sensors and a second driving period for performing display on the display panel, wherein the timing controller performs a control to supply a data voltage to a first area of the first driving period adjacent to a boundary surface between the first driving period and the second driving period.

Abstract translation: 公开了一种显示装置，包括：显示面板，包括数据线和栅极线; 包括多个触摸屏的触摸屏; 用于向数据线提供数据电压的数据驱动电路; 栅极驱动电路，用于向栅极线提供栅极电压; 触摸感测电路，用于向触摸传感器施加驱动信号以感测触摸传感器的电压或电容值的变化; 以及定时控制器，用于将第一帧周期时分为用于感测所述触摸传感器的第一驱动周期和用于在所述显示面板上执行显示的第二驱动周期，其中所述定时控制器执行控制以将数据电压提供给第一 与第一驱动期间和第二驱动期间之间的边界面相邻的第一驱动期间的区域。

公开(公告)号：US09229599B2

公开(公告)日：2016-01-05

申请号：US14724728

申请日：2015-05-28

Applicant: LG Display Co., Ltd.

Inventor： Junghan Lee ,  SungChul Kim

IPC: G06F3/044 ,  G06F3/041 ,  G09G3/36

CPC classification number: G06F3/044 ,  G06F3/041 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/0418 ,  G06F2203/04101 ,  G09G3/36 ,  G09G3/3674 ,  G09G3/3677 ,  G09G3/3685 ,  G09G3/3688 ,  G09G3/3696 ,  G09G2310/0272 ,  G09G2310/0278

Abstract: A display device with an integrated touch screen including a display panel including electrodes divided into a plurality of block type groups and a plurality of data lines; a display driver IC configured to apply a common voltage to the electrodes when a driving mode of the panel is a display driving mode, sequentially apply a touch scan signal to each block type group when the driving mode of the panel is a touch driving mode, and apply a data signal to the data lines associated with a corresponding block type group when the touch scan signal is applied to the corresponding block type group; and a touch IC configured to generate the touch scan signal and apply the touch scan signal to the display driver IC.

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

IPC: G06F3/041 ,  G06F3/044

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.

公开(公告)号：US11644725B2

公开(公告)日：2023-05-09

申请号：US17520143

申请日：2021-11-05

Applicant: LG DISPLAY CO., LTD.

Inventor： SeongKyu Kang ,  SungChul Kim ,  HoonBae Kim ,  SunYeop Kim

IPC: G09G3/34 ,  G02F1/1362 ,  G09G3/36

CPC classification number: G02F1/136286 ,  G09G3/3688 ,  G02F2201/121 ,  G02F2201/123

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.

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

IPC: G06F3/041 ,  G06F3/044 ,  G09G3/20

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.

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

IPC: G06F3/041 ,  G06F3/047 ,  G06F3/044

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.

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

IPC: G06F3/041 ,  G06F3/044

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.