公开(公告)号：US11978387B2

公开(公告)日：2024-05-07

申请号：US18221610

申请日：2023-07-13

Applicant: LG Display Co., Ltd.

Inventor： Taehun Kim ,  WooKyu Sang ,  Moonsoo Chung

IPC: G09G3/20 ,  G09G3/3233

CPC classification number: G09G3/2096 ,  G09G3/2007 ,  G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0262 ,  G09G2310/08 ,  G09G2320/0247 ,  G09G2340/0442

Abstract: A display device can include a light-emitting element, a driving transistor providing a driving current to the light-emitting element using a driving voltage, and a plurality of switching transistors controlling driving of the driving transistor are disposed on a display panel. A gate driving circuit supplies scan signals to the display panel through gate lines. An emission driving circuit supplies a plurality of emission signals to the display panel through a plurality of emission signal lines. A data driving circuit supplies a data voltage to the display panel. A timing controller divides the display panel into a plurality of blocks and controls a level of a bias voltage applied to the driving transistor of a corresponding block among the plurality of blocks according to a grayscale of the data voltage supplied to the corresponding block in a low-speed mode operating at a low-speed driving frequency.

公开(公告)号：US20240386841A1

公开(公告)日：2024-11-21

申请号：US18787575

申请日：2024-07-29

Applicant: LG Display Co., Ltd.

Inventor： WooKyu Sang ,  Moonsoo Chung ,  Taehun Kim

IPC: G09G3/32 ,  H01L27/15 ,  H01L33/60

Abstract: A display device includes a pixel circuit connected to a light emitting element. The pixel circuit includes a driving transistor having a gate electrode, a source electrode, and a drain electrode, and a capacitor connected with the gate electrode. The pixel circuit is driven according to a first period when a reference voltage is applied to the gate electrode, a second period when a gate-source voltage difference of the driving transistor is a threshold voltage of the driving transistor, a third period when the reference voltage is applied to the capacitor, and a voltage of the gate electrode varies due to a coupling phenomenon of the capacitor, a fourth period when a high-potential voltage higher than the reference voltage is applied to the source electrode, and a fifth period when the driving transistor is turned on to cause the light emitting element to emit light.

公开(公告)号：US20240112625A1

公开(公告)日：2024-04-04

申请号：US18468220

申请日：2023-09-15

Applicant: LG Display Co., Ltd.

Inventor： WooKyu Sang ,  Moonsoo Chung ,  Taehun Kim

IPC: G09G3/32 ,  H01L27/15 ,  H01L33/60

CPC classification number: G09G3/32 ,  H01L27/156 ,  H01L33/60 ,  G09G2300/0408 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0202 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0252 ,  G09G2320/045

Abstract: A display device includes a pixel circuit connected to a light emitting element. The pixel circuit includes a driving transistor having a gate electrode, a source electrode, and a drain electrode, and a capacitor connected with the gate electrode. The pixel circuit is driven according to a first period when a reference voltage is applied to the gate electrode, a second period when a gate-source voltage difference of the driving transistor is a threshold voltage of the driving transistor, a third period when the reference voltage is applied to the capacitor, and a voltage of the gate electrode varies due to a coupling phenomenon of the capacitor, a fourth period when a high-potential voltage higher than the reference voltage is applied to the source electrode, and a fifth period when the driving transistor is turned on to cause the light emitting element to emit light.

公开(公告)号：US10600369B2

公开(公告)日：2020-03-24

申请号：US15835171

申请日：2017-12-07

Applicant: LG DISPLAY CO., LTD.

Inventor： Taehun Kim ,  Kitae Kwon ,  Kyujin Kim ,  Jiah Kim

IPC: G09G3/3291 ,  G09G3/3233 ,  G09G3/3258

Abstract: The disclosure relates to data driver and organic light emitting display device. The data driver includes: an input unit configured to receive an input data; a compensation data generator configured to generate a compensation data by applying a compensation value to the input data; a converter unit configured to convert the input data into an image data voltage and to convert the compensation data into a compensation data voltage; and an output unit configured to separately output the image data voltage and the compensation data voltage to a data line of the organic light emitting display.

公开(公告)号：US10248239B2

公开(公告)日：2019-04-02

申请号：US15630182

申请日：2017-06-22

Applicant: LG Display Co., Ltd.

Inventor： Byeongseong So ,  Kyujin Kim ,  Taehun Kim ,  Seungjin Yoo

IPC: G06F3/041 ,  G02F1/1333 ,  G09G3/36 ,  G06F3/044 ,  G02F1/1343 ,  G09G3/20 ,  G11C19/28

Abstract: A touch sensor integrated type display device includes: a display panel including: pixels connected to data lines and gate lines and division-driven into a plurality of panel blocks, and a plurality of touch sensors connected to the pixels, a display driving circuit providing data of an input image to the pixels in multiple display periods divided from one frame period, and a touch sensing circuit driving the touch sensors and sensing a touch input in a touch sensing period allocated between the display periods of the frame period, adjacent panel blocks being division-driven in the display periods that are separated from each other with the touch sensing period, in which the touch sensors are driven, interposed therebetween, the display driving circuit including a shift register: shifting a gate pulse in accordance with a shift clock timing, and sequentially supplying the gate pulse to the gate lines.

公开(公告)号：US20250148965A1

公开(公告)日：2025-05-08

申请号：US18919300

申请日：2024-10-17

Applicant: LG Display Co., Ltd.

Inventor： Moonsoo Chung ,  WooKyu Sang ,  Taehun Kim

IPC: G09G3/32

Abstract: A display apparatus includes a display panel having a display area including a plurality of subpixels. At least one of the plurality of subpixels may include: a driving transistor having a first electrode connected to a first power line configured to receive a first power voltage; a first switching transistor connected to a data line and having a gate electrode configured to receive a first scan signal; a second switching transistor connected between a gate electrode and a second electrode of the driving transistor and having a gate electrode configured to receive a second scan signal; and a third switching transistor connected with the gate electrode of the driving transistor and having a gate electrode configured to receive an emission control signal.

公开(公告)号：US12183268B2

公开(公告)日：2024-12-31

申请号：US18368371

申请日：2023-09-14

Applicant: LG Display Co., Ltd.

Inventor： Taehun Kim ,  Wookyu Sang ,  Moonsoo Chung

IPC: G09G3/32 ,  G09G3/20 ,  G09G3/3233 ,  G09G3/3258 ,  G09G3/3266 ,  H01L25/075 ,  H01L33/36

Abstract: A display device can include a light emitting element and a pixel circuit including a driving transistor; a first capacitor connected between the driving transistor and a first node; a first transistor connected between the first capacitor and a data line to operate based on a first scan signal; a first light emission transistor connected between the first capacitor and a reference voltage line to operate based on a light emission signal; and a second light emission transistor connected between the driving transistor and a low-potential voltage line to operate based on the light emission signal. The first scan signal sequentially includes a dummy scan signal section and driving scan signal section for turning on the first transistor, and the light emission signal includes a coupling period for turning on the first and second light emission transistors between the dummy scan signal section and the driving scan signal section.

公开(公告)号：US11289024B2

公开(公告)日：2022-03-29

申请号：US16921274

申请日：2020-07-06

Applicant: LG Display Co., Ltd.

Inventor： Kyujin Kim ,  Taehun Kim ,  Donggun Lee

IPC: G09G3/3258 ,  G09G3/3266 ,  G09G3/3291

Abstract: A display device includes: a display panel provided with multiple pixels; a driving circuit; and a power generator, wherein each of the pixels includes: a first switching transistor of which a gate electrode is connected to the gate line, of which a first electrode is connected to the data line, and of which a second electrode is connected to a first node; a driving transistor of which a gate electrode is connected to a reference line and thus receives a reference voltage supplied from the power generator, of which a first electrode is connected to the first node, and of which a second electrode is connected to a second node; and a light-emitting device of which an anode electrode is connected to the second node, and of which a cathode electrode is connected to a power line through which the power generator supplies a low-potential power supply voltage.

公开(公告)号：US10665176B2

公开(公告)日：2020-05-26

申请号：US16024361

申请日：2018-06-29

Applicant: LG Display Co., Ltd.

Inventor： Kitae Kwon ,  Kyujin Kim ,  Taehun Kim

IPC: G09G5/00 ,  G09G3/3291 ,  G09G3/3233 ,  G09G3/30

Abstract: A display panel and an electroluminescent display using the same are disclosed. The display panel includes a first data line charged with a first data signal, a second data line charged with a second data signal, a first subpixel connected to the first data line, a second subpixel connected to the second data line, a gate line commonly connected to the first and second subpixels and simultaneously supplying a gate signal to the first and second subpixels, a demultiplexer connecting an output terminal of a data driver to the first data line using MUX switch elements and then connecting the output terminal to the second data line using the MUX switch elements, and a switch array supplying a reference voltage to the second data line when the output terminal is connected to the first data line by the demultiplexer using REF switch elements.

公开(公告)号：US12080228B2

公开(公告)日：2024-09-03

申请号：US18468220

申请日：2023-09-15

Applicant: LG Display Co., Ltd.

Inventor： WooKyu Sang ,  Moonsoo Chung ,  Taehun Kim

IPC: G09G3/32 ,  H01L27/15 ,  H01L33/60

CPC classification number: G09G3/32 ,  H01L27/156 ,  H01L33/60 ,  G09G2300/0408 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0202 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0252 ,  G09G2320/045

Abstract: A display device includes a pixel circuit connected to a light emitting element. The pixel circuit includes a driving transistor having a gate electrode, a source electrode, and a drain electrode, and a capacitor connected with the gate electrode. The pixel circuit is driven according to a first period when a reference voltage is applied to the gate electrode, a second period when a gate-source voltage difference of the driving transistor is a threshold voltage of the driving transistor, a third period when the reference voltage is applied to the capacitor, and a voltage of the gate electrode varies due to a coupling phenomenon of the capacitor, a fourth period when a high-potential voltage higher than the reference voltage is applied to the source electrode, and a fifth period when the driving transistor is turned on to cause the light emitting element to emit light.