公开(公告)号：US10416816B2

公开(公告)日：2019-09-17

申请号：US14954859

申请日：2015-11-30

Applicant: LG Display Co., Ltd.

Inventor： Junghan Lee ,  Sungchul Kim

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

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：US10175803B2

公开(公告)日：2019-01-08

申请号：US15961330

申请日：2018-04-24

Applicant: LG Display Co., Ltd.

Inventor： Sungchul Kim ,  Junghan Lee

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch sensing device includes a touch screen coupled with a display panel including data lines, gate lines crossing the data lines, and pixels arranged in a matrix form, and a touch sensing circuit which supplies a driving signal to lines of the touch screen and senses a touch input. The touch sensing circuit detects an optimum sensing time, in which changes in a voltage change of the gate lines are maintained within a previously determined allowable range, in a touch screen drive period in which data is not written to the pixels of the display panel. The touch sensing circuit supplies the driving signal to the lines of the touch screen only in the optimum sensing time of the touch screen drive period.

公开(公告)号：US11372487B2

公开(公告)日：2022-06-28

申请号：US17134401

申请日：2020-12-26

Applicant: LG Display Co., Ltd.

Inventor： Junghan Lee ,  Sungchul Kim

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

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：US10474280B2

公开(公告)日：2019-11-12

申请号：US15381410

申请日：2016-12-16

Applicant: LG Display Co., Ltd.

Inventor： Hyunguk Jang ,  Cheolse Kim ,  Sungchul Kim ,  Sanghyuck Bae ,  Sungsu Han ,  Suyun Ju ,  Doyoung Jung

IPC: G06F3/041 ,  G06F3/0354 ,  G06F3/038 ,  G06F3/044

Abstract: A touch sensing system is disclosed. The touch sensing system includes an active stylus pen that generates a first pen driving signal for detecting a touch input in synchronization with a touch driving signal input from a touch screen and a second pen driving signal for detecting an additional input related to an additional function of the active stylus pen in a touch driving period and outputs the first and second pen driving signals to the touch screen; and a touch driving device that applies the touch driving signal to the touch screen, senses the first pen driving signal in a first period of the touch driving period, and senses the second pen driving signal in a second period of the touch driving period.

公开(公告)号：US10324547B2

公开(公告)日：2019-06-18

申请号：US15384766

申请日：2016-12-20

Applicant: LG Display Co., Ltd.

Inventor： Sungsu Han ,  Hyunguk Jang ,  Sungchul Kim ,  Sanghyuck Bae ,  Suyun Ju ,  Doyoung Jung

IPC: G06F3/038 ,  G06F3/041 ,  G06F3/0354 ,  G06F3/044

Abstract: An active stylus pen according to the present invention includes a first signal processor configured to generate a touch frame recognition signal for discriminating touch frames on the basis of sub-pulses corresponding to part of each touchscreen driving signal received from a touchscreen and a second signal processor configured to generate a pen driving signal synchronized with main pulses of each touchscreen driving signal other than the sub-pulses and to vary the pen driving signal in units of a touch frame according to the touch frame recognition signal such that additional pen information is reflected in the pen driving signal.

公开(公告)号：US10282018B2

公开(公告)日：2019-05-07

申请号：US15394122

申请日：2016-12-29

Applicant: LG Display Co., Ltd.

Inventor： Sungchul Kim

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

Abstract: A display device includes a display panel including data lines, gate lines crossing the data lines, and pixels arranged in a matrix form, a touch screen which is embedded in the display panel or is installed on the display panel, a data driving circuit supplying a data voltage to the data lines, a gate driving circuit supplying a gate pulse to the gate lines, and a touch sensing circuit which supplies a driving signal to lines of the touch screen and senses a touch input. The gate driving circuit alternately drives pull-down transistors connected in parallel to one gate line. The gate driving circuit drives one of the pull-down transistors or simultaneously drives the pull-down transistors during a drive period of the touch screen.

公开(公告)号：US09946403B2

公开(公告)日：2018-04-17

申请号：US14984740

申请日：2015-12-30

Applicant: LG Display Co., Ltd.

Inventor： Sungchul Kim ,  Hyunguk Jang ,  Sanghyuck Bae ,  Sungsu Han ,  Suyun Ju ,  Doyoung Jung ,  Kyungjin Jang ,  Yoonion Hwang

IPC: G06F3/045 ,  G06F3/041 ,  G06F3/044 ,  G06F3/0354

CPC classification number: G06F3/0418 ,  G06F3/03545 ,  G06F3/0412 ,  G06F3/044

Abstract: A touch sensitive display device, a method for driving the same, and a driving circuit of the display device are disclosed. The touch sensitive display device comprises a display panel comprising a plurality of pixels and a plurality of touch sensors. Each touch sensor is connected to at least one respective pixel of the pixels, the display panel driven in a plurality of successive display frame periods and during each display frame period a respective frame of image data is driven to the pixels. A touch driving circuit drives touch driving signals to the touch sensors during a touch frame that begins in a first display frame period of the display frame periods and ends in a second display frame period of the display frame periods that immediately follows the first display frame period.

公开(公告)号：US10698537B2

公开(公告)日：2020-06-30

申请号：US15158440

申请日：2016-05-18

Applicant: LG Display Co., Ltd.

Inventor： Junghan Lee ,  Sungchul Kim

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

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：US10268285B2

公开(公告)日：2019-04-23

申请号：US15249113

申请日：2016-08-26

Applicant: LG Display Co., Ltd.

Inventor： Doyoung Jung ,  Hyunguk Jang ,  Sungchul Kim ,  Sanghyuck Bae ,  Sungsu Han ,  Suyun Ju

IPC: G06F3/0354 ,  G06F3/041 ,  G06F3/0487 ,  G06F3/044

Abstract: An active stylus pen generates a pen driving signal synchronized with a touchscreen driving signal received from a touchscreen and outputs the pen driving signal to the touchscreen. The active stylus pen includes a pressure sensing unit for sensing pressure when touching the touchscreen to generate writing pressure information and a signal processor for modulating the pen driving signal in response to the signal level of the writing pressure information and outputs the modulated signal as a pen driving signal in which the writing pressure information has been reflected.

公开(公告)号：US10203782B2

公开(公告)日：2019-02-12

申请号：US15215769

申请日：2016-07-21

Applicant: LG Display Co., Ltd.

Inventor： Doyoung Jung ,  Hyunguk Jang ,  Sungchul Kim ,  Sanghyuck Bae ,  Sungsu Han ,  Suyun Ju

IPC: G06F3/045 ,  G06F3/038 ,  G06F3/044 ,  G06F3/0354

Abstract: A touch sensing system comprises a touchscreen with a plurality of touch electrodes, to which a touchscreen driving signal is applied, and a stylus pen that generates a pen driving signal based on the touchscreen driving signal and sends the same to the touchscreen. The stylus pen comprises: an amplifier that amplifies the touchscreen driving signal to generate an amplified signal; a comparator that compares the amplified signal with a preset reference voltage to generate a comparator output signal; and a signal processor that measures the pulse width of the comparator output signal, adjusts an amount of delay based on a measurement, and determines an output timing of the pen driving signal based on an adjusted amount of delay to synchronize the pen driving signal with the touchscreen driving signal.