公开(公告)号：US11862089B2

公开(公告)日：2024-01-02

申请号：US17965414

申请日：2022-10-13

Applicant: LG DISPLAY CO., LTD.

Inventor： CheolSe Kim

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3291

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G3/3291 ,  G09G2300/0852 ,  G09G2310/0278 ,  G09G2310/08 ,  G09G2320/0233

Abstract: A subpixel circuit, a display panel, and a display device are disclosed. A subpixel circuit for operating a subpixel of a display panel may include: a reference circuit configured to receive a high-potential voltage and to output a control voltage for controlling a driving current flowing through a light emitting element; a light emitting circuit including the light emitting element, the light emitting circuit being configured to receive the control voltage and a low-potential voltage and to control the light emitting element based on a driving voltage; an amplification circuit configured to compare the control voltage and a data voltage to generate the driving voltage for controlling the light emitting circuit; and an input circuit configured to receive the data voltage and a first scan signal and to control a timing of applying the data voltage to the amplification circuit based on the first scan signal.

公开(公告)号：US20230195249A1

公开(公告)日：2023-06-22

申请号：US17972448

申请日：2022-10-24

Applicant: LG Display Co., Ltd.

Inventor： CheolSe Kim ,  SungChul Kim ,  HoonBae Kim ,  SunYeop Kim ,  Jinseong Kim ,  JuHan Kim ,  Haewon Lee

IPC: G06F3/041 ,  H01L33/62 ,  G06F3/044 ,  H01L25/075

CPC classification number: G06F3/0412 ,  H01L33/62 ,  G06F3/0446 ,  H01L25/0753 ,  G06F3/0416

Abstract: A display device includes a substrate including a plurality of sub pixels; a first touch electrode on the substrate and overlapping at least one subpixel from the plurality of sub pixels; a second touch electrode on the substrate and spaced apart from the first touch electrode and overlapping the at least one sub pixel; an insulating layer covering the first touch electrode and the second touch electrode; a plurality of charging transistors on the insulating layer and electrically connected to one of the first touch electrode and the second touch electrode; a plurality of sensing transistors on the insulating layer and electrically connected to one of the first touch electrode and the second touch electrode; a planarization layer covering the plurality of charging transistors and the plurality of sensing transistors; and a light emitting diode on the planarization layer.

公开(公告)号：US11487371B2

公开(公告)日：2022-11-01

申请号：US16872089

申请日：2020-05-11

Applicant: LG Display Co., Ltd.

Inventor： CheolSe Kim ,  BuYeol Lee ,  YongChan Park ,  Suyun Ju

IPC: G06F3/041 ,  G06F3/044

Abstract: The present embodiments relate to a touch technology and, more particularly, to a touch display device, which includes multiple first electrodes embedded in a display panel, at least one second electrode positioned outside the display panel, and a touch force sensing gap existing between the multiple first electrodes and the at least one second electrode, a method for driving the same, and a driving circuit for driving the multiple first electrodes and the at least one second electrode. The present embodiments, as described above, make it possible to sense not only a touch position, but also a touch force, with which the user presses the screen during a touch.

公开(公告)号：US11467685B2

公开(公告)日：2022-10-11

申请号：US17245652

申请日：2021-04-30

Applicant: LG Display Co., Ltd.

Inventor： HoonBae Kim ,  CheolSe Kim ,  SeungMok Shin ,  JuHan Kim ,  YongChan Park ,  HyunHo Park

IPC: G06F3/041 ,  G06F3/047 ,  G09G3/20 ,  G06F3/044 ,  G02F1/1333 ,  G02F1/136

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.

公开(公告)号：US10908721B2

公开(公告)日：2021-02-02

申请号：US16455206

申请日：2019-06-27

Applicant: LG Display Co., Ltd.

Inventor： CheolSe Kim ,  JuHan Kim

IPC: G06F3/041

Abstract: A touch display panel and a touch display device. A shield electrode is disposed between a display electrode and touch electrodes, is driven using a signal corresponding to a signal applied to the touch electrodes. Display noise is blocked using the shield electrode, so that the sensitivity of touch sensing signals received from the touch electrodes are improved. In addition, due to the improved sensitivity of touch sensing signals, the performance of touch sensing based on a change in the self-capacitance of the touch electrodes is improved. Both a touch sensing function based on a change in the self-capacitance of the touch electrodes and a touch sensing function based on a change in the mutual capacitance of the touch electrodes are provided.

公开(公告)号：US10902793B2

公开(公告)日：2021-01-26

申请号：US16563653

申请日：2019-09-06

Applicant: LG DISPLAY CO., LTD.

Inventor： SeungSeok Oh ,  CheolSe Kim ,  YoungJoon Lee ,  SungYub Lee

IPC: G09G3/3291 ,  G09G3/3233 ,  G09G3/3266

Abstract: A gate driver circuit, a display panel, and a display device. A number of emission start signals, with at least one a delay time, a pulse width, or a combination thereof, are supplied in a frame period in which display driving is performed at a low driving frequency. This decreases a degree by which luminance appearing in the frame period is reduced, or changes characteristics of frequency components of luminance, thereby preventing flicker from being observed. The display driving is performed at the low driving frequency reduces power consumption, and is performed at a lower driving frequency to improve the efficiency of the display device.

公开(公告)号：US10860128B2

公开(公告)日：2020-12-08

申请号：US16448834

申请日：2019-06-21

Applicant: LG Display Co., Ltd.

Inventor： SeungMok Shin ,  CheolSe Kim ,  JuHan Kim ,  HoonBae Kim ,  HyunHo Park ,  Jinseong Kim ,  YongChan Park

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

Abstract: A touch display panel and device. A common electrode is provided between a display driving signal line and a touch line. The common electrode functions as a shielding pattern that prevents display noise of a touch sensing signal without increasing the number of masks used to form the touch display device. A touch load reducing layer is disposed in a region between the touch line and the common electrode, except for a region in which the common electrode and pixel electrodes overlap. This reduces the load of the touch line and improves touch sensing performance without having an adverse effect on display driving.

公开(公告)号：US10802636B2

公开(公告)日：2020-10-13

申请号：US16439544

申请日：2019-06-12

Applicant: LG Display Co., Ltd.

Inventor： HoonBae Kim ,  CheolSe Kim ,  SungChul Kim ,  SunYeop Kim ,  Seongkyu Kang ,  SeungMok Shin ,  SungHoon Lee

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

Abstract: A touch display device and a method of driving the same. A transition value due to polarity inversion of a data voltage supplied to a predetermined number of adjacent subpixels is reduced by varying an inversion pattern by analysis of image data, so that fluctuations in the voltage of touch electrodes due to the transition of the data voltage are minimized. Accordingly, noise due to fluctuations in the voltage of the touch electrodes is removed so as to improve the performance of touch sensing performed in a period in which display driving is performed.

公开(公告)号：US10725572B2

公开(公告)日：2020-07-28

申请号：US16197285

申请日：2018-11-20

Applicant: LG Display Co., Ltd.

Inventor： HoonBae Kim ,  CheolSe Kim ,  SangHyuck Bae

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

Abstract: The present embodiments relate to a touch display device, a touch system, a driving circuit, and a driving method. The touch display device may include a display panel configured to have a plurality of data lines, a plurality of gate lines, and a plurality of common electrodes, which are arranged thereon, and a driving circuit configured to supply an uplink signal to at least a subset of the plurality of common electrodes disposed in at least a first region of the display panel during the display blank period to enable the pen to detect the uplink signal when the pen is in contact with or is adjacent to the display panel.

公开(公告)号：US10402001B2

公开(公告)日：2019-09-03

申请号：US15784466

申请日：2017-10-16

Applicant: LG Display Co., Ltd.

Inventor： JuHan Kim ,  CheolSe Kim

IPC: G06F3/041 ,  G06F3/044 ,  H01L27/32 ,  H01L51/52 ,  G09G3/3225

Abstract: Disclosed is an electronic device having a force touch function, which has a thin thickness despite having the force touch function. The electronic device includes a substrate, first and second electrodes and a light emitting device layer including a light emitting layer provided on the substrate, and a touch electrode part on the second electrode. A distance between the second electrode and the touch electrode part is changeable according to a touch force applied to the touch electrode part.