公开(公告)号：US20190129540A1

公开(公告)日：2019-05-02

申请号：US16230984

申请日：2018-12-21

Applicant: LG Display Co., Ltd.

Inventor： JungHan LEE ,  HongChul KIM ,  SungChul KIM ,  JeongSeop LEE ,  SeungEun PYO

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0416

Abstract: Discussed are a display device with an integrated touch screen and a method of operating the same. The display device according to an embodiment includes a display panel including a plurality of pixel electrodes; a touch screen including m number of electrodes which are formed to overlap with the plurality of pixel electrodes, wherein m is a multiple of n, and n is an integer equal to or greater than two, and wherein the m electrodes are divided into n number of electrode groups; a touch driver configured to generate a touch scan signal and to supply the generated touch scan signal to a display driver; and the display driver configured to apply a common voltage or the touch scan signal to one or more of the m electrodes depending on a driving mode of the display device.

公开(公告)号：US20180143712A1

公开(公告)日：2018-05-24

申请号：US15875696

申请日：2018-01-19

Applicant: LG Display Co., Ltd.

Inventor： JungHan LEE ,  HongChul KIM ,  SungChul KIM ,  JeongSeop LEE ,  SeungEun PYO

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0416

Abstract: Discussed are a display device with an integrated touch screen and a method of operating the same. The display device according to an embodiment includes a display panel including a plurality of pixel electrodes; a touch screen including m number of electrodes which are formed to overlap with the plurality of pixel electrodes, wherein m is a multiple of n, and n is an integer equal to or greater than two, and wherein the m electrodes are divided into n number of electrode groups; a touch driver configured to generate a touch scan signal and to supply the generated touch scan signal to a display driver; and the display driver configured to apply a common voltage or the touch scan signal to one or more of the m electrodes depending on a driving mode of the display device.

公开(公告)号：US20130342479A1

公开(公告)日：2013-12-26

申请号：US13714053

申请日：2012-12-13

Applicant: LG DISPLAY CO., LTD.

Inventor： SeungEun PYO ,  HongChul KIM

IPC: G06F3/041

CPC classification number: G06F3/041 ,  G06F3/0412 ,  G06F3/044 ,  G09G3/00

Abstract: A display device with an integrated touch screen including a panel including electrodes divided into n number of groups, where n is an integer more than or equal to two; a display driver IC configured to apply a common voltage to the n divided groups when a driving mode of the panel is a display driving mode, and to selectively apply a touch scan signal or the common voltage to the n divided groups when the driving mode of the panel is a touch driving mode; and a touch IC configured to generate the touch scan signal to apply the touch scan signal to the display driver IC.

Abstract translation: 一种具有集成触摸屏的显示装置，包括：面板，其包括分成n个组的电极，其中n是大于或等于2的整数; 显示驱动器IC，被配置为当所述面板的驱动模式为显示驱动模式时，向所述n个分割组施加公共电压，并且当所述驱动模式为所述驱动模式时，选择性地对所述n个分割组施加触摸扫描信号或所述公共电压 面板是触摸驾驶模式; 以及配置为产生触摸扫描信号以将触摸扫描信号施加到显示驱动器IC的触摸IC。

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

IPC: G06F3/041 ,  G06F3/044 ,  G06K9/00

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.

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

IPC: G06K9/00 ,  G06F3/044 ,  G06F3/041

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.

公开(公告)号：US20210064170A1

公开(公告)日：2021-03-04

申请号：US16901799

申请日：2020-06-15

Applicant: LG Display Co., Ltd.

Inventor： KwangJo HWANG ,  HongChul KIM ,  YongChan PARK

IPC: G06F3/041 ,  G06F3/01 ,  G06F3/044 ,  G09G3/20

Abstract: The present disclosure relates to a touch display device and a driving method of the same, and more particularly, to a touch display device, in which a touch is sensed by only utilizing electrodes and a line structure for display so that there is no need to provide a touch panel additionally or form additional touch electrodes in a display panel, thereby reducing the size (thickness) of the touch display device and simplifying a manufacturing process of the touch display device, and a driving method of the same.

公开(公告)号：US20190155429A1

公开(公告)日：2019-05-23

申请号：US16188797

申请日：2018-11-13

Applicant: LG Display Co., Ltd.

Inventor： HongChul KIM

IPC: G06F3/041 ,  G06K9/00 ,  G06F3/042 ,  G09G3/22

Abstract: Disclosed are a display panel and a display device which can sense a fingerprint. A photo-sensor is disposed within a sub-pixel, a voltage change of a pixel electrode according to a leakage current of the photo-sensor exposed to light is sensed, and a fingerprint is sensed, so that a fingerprint can be sensed in an active area of a display panel. Also, a voltage change of the pixel electrode is sensed using a common electrode without directly applying a driving voltage to the pixel electrode, so as to perform driving of the pixel electrode and light irradiation together, thereby enabling a reduction in a fingerprint sensing mode and detection of only the level of a leakage voltage during fingerprint sensing. Therefore, a sensing circuit can be efficiently configured, and sensing sensitivity can be improved.

公开(公告)号：US20180164950A1

公开(公告)日：2018-06-14

申请号：US15836583

申请日：2017-12-08

Applicant: LG Display Co., Ltd.

Inventor： Seongkyu KANG ,  HongChul KIM ,  SungYub LEE

IPC: G06F3/042 ,  G06F3/041

CPC classification number: G06F3/0421 ,  G06F3/0412 ,  G06K9/0004

Abstract: The present disclosure relates to a touch display device, a touch sensing system, and a touch sensing method. More specifically, touch information (fingerprint information or touch position information) may be acquired in response to current flowing in a data line through a touch sensing mode period that includes: a first period in which an optical sensor, the opposite ends of which are connected to a source node and a drain node of a switching transistor, is disposed in a pixel region, a gate signal of a turn-on level voltage is supplied to a gate line and a driving voltage is supplied to the data line; and a second period in which a gate signal of a turn-off level voltage is supplied to the gate line, a reference voltage is supplied to the data line, and an optical sensor is irradiated with light. According to the present disclosure, it is possible to accurately sense a touch position and/or a fingerprint in an optical manner using an optical sensor without being influenced by parasitic capacitance.

公开(公告)号：US20180088715A1

公开(公告)日：2018-03-29

申请号：US15707714

申请日：2017-09-18

Applicant: LG Display Co., Ltd.

Inventor： SungYub LEE ,  HongChul KIM ,  YoungJoon LEE ,  Seongkyu KANG

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

CPC classification number: G06F3/0412 ,  G02F1/13338 ,  G02F1/1343 ,  G06F3/0416 ,  G06F3/044

Abstract: Provided is a driving circuit included in a touch display device, which is capable of performing display driving, touch sensing, and additional sensing in addition to the touch sensing. The driving circuit includes a common electrode driving controller, a pixel electrode driving controller, and a sending unit. The common electrode driving controller is configured to apply a common voltage to a common electrode during a display-driving period. The pixel electrode driving controller is configured to apply a data voltage to a pixel electrode during the display-driving period. The sensing unit is connected to the common electrode driving controller during a first sensing period and to the pixel electrode driving controller during a second sensing period. The sensing unit is configured to sense a change in capacitance between the common electrode or pixel electrode and an object that is in contact with the display panel.