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：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.

公开(公告)号：US11114034B2

公开(公告)日：2021-09-07

申请号：US16921251

申请日：2020-07-06

Applicant: LG Display Co., Ltd.

Inventor： Donggun Lee ,  Kyujin Kim ,  Taehun Kim ,  Seungjin Yoo

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

Abstract: A display device is proposed, the display device including a display panel and a driving circuit, and pixels included in the display panel includes a driving transistor, a light emitting element, a capacitor, and first to sixth switching transistors T1 to T6. T1 senses threshold voltage of the driving transistor, the capacitor stores data voltage and a threshold voltage in both electrodes, T2 applies data voltage to the capacitor, T3 initializes the storage capacitor to reference voltage, and T4 initialize the light emitting element to reference voltage, T5 controls current flow between the driving transistor and the light emitting element, and T6 connects both electrodes of the capacitor. The driving circuit divides one frame into an initialization period, a program period, and a light emission period to drive a pixel, and stops light emission of the light emitting device and make equal voltage across the capacitor, in the initialization period.