公开(公告)号：US09721509B2

公开(公告)日：2017-08-01

申请号：US15169251

申请日：2016-05-31

Applicant: LG Display Co., Ltd.

Inventor： Junghyeon Kim ,  Hyungjin Bang

IPC: H01L29/04 ,  G09G3/3258 ,  G09G3/3233 ,  H01L27/12 ,  G09G3/3208 ,  G09G3/325 ,  H01L29/786

CPC classification number: G09G3/3258 ,  G09G3/3208 ,  G09G3/3233 ,  G09G3/325 ,  G09G2300/0417 ,  G09G2300/0426 ,  G09G2300/043 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0262 ,  G09G2310/06 ,  G09G2310/08 ,  G09G2320/0247 ,  G09G2320/0252 ,  G09G2320/043 ,  G09G2330/021 ,  G09G2340/0435 ,  H01L27/1225 ,  H01L27/1229 ,  H01L27/1251 ,  H01L29/78609 ,  H01L29/78633

Abstract: An active matrix organic light emitting diode (OLED) display device includes an array of pixels, each pixel including an OLED, a driving transistor (DT) coupled to drive current through the OLED, a storage capacitor, and a scanning transistor (ST) coupled to control charge on the storage capacitor corresponding to a data voltage for said pixel. The display device also includes a timing controller configured to control the ST of each pixel to update the charge stored on the storage capacitor of each pixel at a frame rate including at least one frequency within a range of 1-10 Hertz (Hz).

公开(公告)号：US10319309B2

公开(公告)日：2019-06-11

申请号：US15783832

申请日：2017-10-13

Applicant: LG Display Co., Ltd.

Inventor： Junghyeon Kim ,  Jinhan Yoon ,  Hanjin Bae

IPC: G06F3/038 ,  G09G5/00 ,  G09G3/3291 ,  G09G3/20 ,  G09G3/3233 ,  G09G3/3266

Abstract: The present invention provides a display device that comprises a display panel displaying an image, M reference voltage generators (M is an integer of 2 or greater) that respectively supply reference voltages to N display areas (N is an integer of 2 or greater) defined on the display panel, and a voltage variation corrector that corrects for voltage variations between the M reference voltages (M is an integer of 2 or greater).

公开(公告)号：US09685119B2

公开(公告)日：2017-06-20

申请号：US14586567

申请日：2014-12-30

Applicant: LG DISPLAY CO., LTD.

Inventor： Taegung Kim ,  Junghyeon Kim ,  Jinhan Yoon

IPC: G09G3/30 ,  G09G3/3291 ,  G09G3/3275 ,  G09G3/00 ,  G09G3/3258 ,  G09G3/3233 ,  G09G3/3225

CPC classification number: G09G3/3291 ,  G09G3/006 ,  G09G3/3225 ,  G09G3/3233 ,  G09G3/3258 ,  G09G3/3275 ,  G09G2300/0819 ,  G09G2300/0828 ,  G09G2310/027 ,  G09G2310/0291 ,  G09G2310/08 ,  G09G2320/0223 ,  G09G2320/0285 ,  G09G2320/029 ,  G09G2320/045 ,  G09G2330/12

Abstract: An organic light emitting display is provided which offers shorter sensing time and higher sensing accuracy when sensing variations in electrical characteristics of a driving element. The organic light emitting display can include: a display panel with a plurality of pixels; a gate driving circuit that generates a sensing gate pulse corresponding to one line sensing ON time in a sensing operation and sequentially supplies the same to gate lines in a line sequential manner; a data driving circuit comprising a plurality of current integrators that perform an integration of the source-drain current of the driving TFT of each pixel input through the sensing lines and an ADC that sequentially digitizes the output of the current integrators to output digital sensed values; and a timing controller that controls the operations of the gate driving circuit and data driving circuit.

公开(公告)号：US09412303B2

公开(公告)日：2016-08-09

申请号：US14740564

申请日：2015-06-16

Applicant: LG Display Co., Ltd.

Inventor： Junghyeon Kim ,  Hyungjin Bang

IPC: H01L29/04 ,  G09G3/32 ,  H01L27/12

CPC classification number: G09G3/3258 ,  G09G3/3208 ,  G09G3/3233 ,  G09G3/325 ,  G09G2300/0417 ,  G09G2300/0426 ,  G09G2300/043 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0262 ,  G09G2310/06 ,  G09G2310/08 ,  G09G2320/0247 ,  G09G2320/0252 ,  G09G2320/043 ,  G09G2330/021 ,  G09G2340/0435 ,  H01L27/1225 ,  H01L27/1229 ,  H01L27/1251 ,  H01L29/78609 ,  H01L29/78633

Abstract: An active matrix organic light emitting diode (OLED) display device includes an array of pixels, each pixel including an OLED, a driving transistor (DT) coupled to drive current through the OLED, a storage capacitor, and a scanning transistor (ST) coupled to control charge on the storage capacitor corresponding to a data voltage for said pixel. The display device also includes a timing controller configured to control the ST of each pixel to update the charge stored on the storage capacitor of each pixel at a frame rate including at least one frequency within a range of 1-10 Hertz (Hz).

Abstract translation: 有源矩阵有机发光二极管（OLED）显示装置包括像素阵列，每个像素包括OLED，耦合以驱动通过OLED的电流的驱动晶体管（DT），存储电容器和耦合的扫描晶体管（ST） 以控制对应于所述像素的数据电压的存储电容器上的电荷。 显示装置还包括定时控制器，其被配置为控制每个像素的ST以以1-10赫兹（Hz）的范围内的至少一个频率的帧速率更新存储在每个像素的存储电容器上的电荷。

公开(公告)号：US12254831B2

公开(公告)日：2025-03-18

申请号：US18542232

申请日：2023-12-15

Applicant: LG Display Co., Ltd.

Inventor： Junghyeon Kim ,  Taewook Kim

IPC: G09G3/3233

Abstract: A display device comprises a pixel circuit including a driving element having a gate electrode connected to a first node and a source electrode connected to a second node, a light emitting element connected to the second node, a first switch element that connects a data line and the first node, and a second switch element that connects a reference voltage line and the second node; a gate driver that supplies a scan signal to the gate line; and a sensing circuit that senses a voltage of the reference voltage line during a sensing period, wherein during an initialization period the scan signal is higher than the sensing data voltage, during the sensing period, the scan signal is higher than the first ground voltage and lower than the sensing data voltage, during the sensing period, a voltage of the second node is stored in a sensing capacitor.

公开(公告)号：US09830854B2

公开(公告)日：2017-11-28

申请号：US15189403

申请日：2016-06-22

Applicant: LG Display Co., Ltd.

Inventor： Taegung Kim ,  Junghyeon Kim

IPC: G09G3/3225 ,  G09G3/3233

CPC classification number: G09G3/3225 ,  G09G3/3233 ,  G09G2300/0842 ,  G09G2310/0289 ,  G09G2320/0233 ,  G09G2320/0252 ,  G09G2320/0295 ,  G09G2320/043

Abstract: A device for sensing a threshold voltage of a driving TFT in an organic light emitting display includes a data drive circuit and a timing controller. The data drive circuit applies a data voltage to a gate node of the driving TFT during a first programming period, determines a source node voltage of the driving TFT as a first sensing voltage during a first sensing period in which a gate-source voltage is constant and higher than the threshold voltage, applies another data voltage to the gate node during a second programming period, and determines the source node voltage as a second sensing voltage during a second sensing period in which the gate-source voltage is constant and higher than the threshold voltage. The timing controller calculates a ratio between the first and second sensing voltages, and obtains a change in the threshold voltage using a change in the ratio.

公开(公告)号：US20240221663A1

公开(公告)日：2024-07-04

申请号：US18542232

申请日：2023-12-15

Applicant: LG Display Co., Ltd.

Inventor： Junghyeon Kim ,  Taewook Kim

IPC: G09G3/3233 ,  G09G3/3266

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G3/2092 ,  G09G2300/0819 ,  G09G2300/0842

Abstract: A display device comprises a pixel circuit including a driving element having a gate electrode connected to a first node and a source electrode connected to a second node, a light emitting element connected to the second node, a first switch element that connects a data line and the first node, and a second switch element that connects a reference voltage line and the second node; a gate driver that supplies a scan signal to the gate line; and a sensing circuit that senses a voltage of the reference voltage line during a sensing period, wherein during an initialization period the scan signal is higher than the sensing data voltage, during the sensing period, the scan signal is higher than the first ground voltage and lower than the sensing data voltage, during the sensing period, a voltage of the second node is stored in a sensing capacitor.

公开(公告)号：US10055057B2

公开(公告)日：2018-08-21

申请号：US15235096

申请日：2016-08-11

Applicant: LG Display Co., Ltd.

Inventor： Taegung Kim ,  Seungtae Kim ,  Junghyeon Kim

IPC: G06F3/041 ,  G02F1/1333 ,  G06F3/044 ,  G09G3/3233 ,  G09G3/3225 ,  G09G3/3266 ,  H01L27/32

CPC classification number: G06F3/0418 ,  G02F1/13338 ,  G02F1/13624 ,  G02F2001/13685 ,  G06F3/0412 ,  G06F3/044 ,  G09G3/3225 ,  G09G3/3233 ,  G09G3/3266 ,  G09G2300/0413 ,  G09G2300/0426 ,  G09G2310/08 ,  G09G2320/029 ,  H01L27/3223 ,  H01L27/323

Abstract: A touch sensor integrated display device and a method for driving the same are disclosed. The touch sensor integrated display device includes a display panel, in which a pixel array is divided into a plurality of touch blocks, each touch block includes pixels displaying an input image and a sensing target dummy pixel sensing a touch input, and the sensing target dummy pixel includes a dummy driving TFT configured to control a source-drain current based on a gate-source voltage, and a panel drive circuit, which in a touch sensing period, supplies a scan control signal and a sensing control signal to the sensing target dummy pixel and sets the gate-source voltage to turn on the dummy driving TFT by applying a touch driving data voltage to a gate node of the dummy driving TFT and applying a reference voltage to a source node of the dummy driving TFT.