公开(公告)号：US10733934B2

公开(公告)日：2020-08-04

申请号：US16566526

申请日：2019-09-10

Applicant: LG DISPLAY CO., LTD.

Inventor： BuYeol Lee ,  YoungJoon Lee

IPC: G09G3/3233 ,  H01L51/52 ,  G09G3/3258

Abstract: An organic light-emitting display device can include a display panel including a plurality of pixels and configured to express luminance based on a driving current corresponding to a data signal for providing a data voltage and a first power; a control circuit configured to output a first mode control signal corresponding to a normal mode and a second mode control signal corresponding to a standby mode for providing lower luminance than the normal mode; and a power source configured to supply the first power to the display panel at a first voltage level, in response to receiving the first mode control signal corresponding to the normal mode, and supply the first power to the display panel at a second voltage level that is lower than the first voltage level, in response to receiving the second mode control signal corresponding to the standby mode.

公开(公告)号：US10607544B2

公开(公告)日：2020-03-31

申请号：US15689681

申请日：2017-08-29

Applicant: LG DISPLAY CO., LTD.

Inventor： BuYeol Lee ,  YoungJoon Lee

IPC: G09G3/30 ,  G09G3/3258 ,  G09G3/3233 ,  G09G3/3275

Abstract: An organic light-emitting display device includes an organic light-emitting display panel having a plurality of subpixels connected to data lines and gate lines; a data driver driving the data lines; and a gate driver driving the gate lines, wherein the organic light-emitting display device has a first mode having a first refresh rate and a second mode having a second refresh rate that is lower than the first refresh rate, the second mode having a first period and a second period that is subsequent to the first period, and wherein, in the first period of the second mode, the data driver subsequently supplied data voltages to at least two of the plurality of subpixels, and in the second period of the second mode, the data driver supplies a specific voltage to the plurality of subpixels, the specific voltage being the same as one of at least two of the data voltages sequentially supplied to the at least two subpixels.

公开(公告)号：US11030962B2

公开(公告)日：2021-06-08

申请号：US16725022

申请日：2019-12-23

Applicant: LG Display Co., Ltd.

Inventor： SungYub Lee ,  YoungJoon Lee ,  SeungSeok Oh

IPC: G09G3/34 ,  G09G3/36

Abstract: A backlight unit and a display device are provided. The duty or the like of a light source driving signal is adjusted so that a frequency component causing flicker to be visible, among frequency components of luminance appearing in a driving period of low-speed driving mode. Flicker is prevented or reduced in the low-speed driving mode. The display device is driven in the low-speed driving mode to reduce power consumption. The display device is driven at a lower display driving frequency in the low-speed driving mode, thereby improving the efficiency thereof.

公开(公告)号：US10452180B2

公开(公告)日：2019-10-22

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: G06F3/045 ,  G06F3/041 ,  G02F1/1333 ,  G02F1/1343 ,  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.

公开(公告)号：US10957249B2

公开(公告)日：2021-03-23

申请号：US15793729

申请日：2017-10-25

Applicant: LG DISPLAY CO., LTD.

Inventor： YoungJoon Lee

IPC: G09G3/3233 ,  G09G3/3258 ,  H05B45/10 ,  H01L51/52

Abstract: An organic light emitting display device can include a display panel that expresses brightness based on a driving current corresponding to a data voltage, a power source unit that supplies power to the display panel, and a controller configured that outputs a mode control signal for determining a normal mode and a standby mode, drives the display panel to display a first frame for a first time period in the normal mode based on the mode control signal, and drives the display panel to display a second frame for a second time period that is longer than the first time period in the standby mode based on the mode control signal, in which the power source unit supplies a compensation voltage to at least one pixel during the standby mode for compensating a change in the data voltage in the pixel.

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：US10572709B2

公开(公告)日：2020-02-25

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 ,  G06F3/041 ,  G06F3/044

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：US20240090283A1

公开(公告)日：2024-03-14

申请号：US18239638

申请日：2023-08-29

Applicant: LG Display Co., Ltd.

Inventor： Yangsik Lee ,  HwiDeuk Lee ,  YoungJoon Lee

IPC: H10K59/131 ,  G06F3/041 ,  G06F3/044 ,  H10K59/40

CPC classification number: H10K59/131 ,  G06F3/0412 ,  G06F3/04184 ,  G06F3/044 ,  H10K59/40 ,  G06F2203/04112 ,  G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0842

Abstract: A touch display device and a display panel are disclosed. Specifically, there may be provided a touch display device comprising a display area in which a plurality of subpixels are arranged in a first direction and a second direction, a reference voltage line extending along the first direction in a first line area between the plurality of subpixels, a data line extending along the first direction in a second line area between the plurality of subpixels, a driving voltage line extending along the first direction in a third line area between the plurality of subpixels, a touch electrode pattern disposed to overlap the reference voltage line or the driving voltage line, and a touch driving circuit applying a touch driving signal to the touch electrode pattern through a touch line and detecting touch according to a change in capacitance.

公开(公告)号：US10453393B2

公开(公告)日：2019-10-22

申请号：US15793541

申请日：2017-10-25

Applicant: LG DISPLAY CO., LTD.

Inventor： BuYeol Lee ,  YoungJoon Lee

IPC: G09G3/3233 ,  H01L51/52

Abstract: An organic light-emitting display device can include a display panel that expresses luminance based on a driving current corresponding to a data voltage and a first power; a control circuit that outputs a first mode control signal for a normal mode and a second mode control signal for a standby mode for lower luminance; and a power source that supplies the first power at a first voltage level, in response to receiving the first mode control signal, and supplies the first power at a second voltage level that is lower than the first voltage level, in response to receiving the second mode control signal.