公开(公告)号：US10692411B2

公开(公告)日：2020-06-23

申请号：US16224324

申请日：2018-12-18

Applicant: LG Display Co., Ltd.

Inventor： Beom-Jin Kim ,  Sunkyung Shin ,  Bongchoon Kwak ,  Sojung Jung

IPC: G06F3/038 ,  G09G3/00 ,  G09G3/3275 ,  G09G3/3266 ,  G09G3/3233

Abstract: The embodiments of the present disclosure relate to a display device, a test circuit, and a test method thereof. More specifically, a display device may include a silicon substrate having a plurality of gate lines, a plurality of data lines, a plurality of sensing lines, and a pixel array on which a plurality of subpixels are arranged; a test circuit arranged on the silicon substrate, the test circuit configured to select at least one line of the plurality of data lines or the plurality of sensing lines, to convert a signal transmitted through the selected line into a digital signal, and to output test data; and a test pad unit configured to output the test data to a circuit outside the silicon substrate.

公开(公告)号：US12236898B2

公开(公告)日：2025-02-25

申请号：US18361741

申请日：2023-07-28

Applicant: LG Display Co., Ltd.

Inventor： Beom-Jin Kim ,  Hyunwoo Kim ,  Bongchoon Kwak ,  HongJu Lee

IPC: G09G3/3275 ,  G09G3/3266

Abstract: Embodiments of the disclosure relate to a display device and a data driving circuit. Specifically, there may be provided a display device comprising a display panel where a plurality of gate lines, a plurality of data lines, and a plurality of subpixels are disposed, a gate driving circuit configured to supply scan signals to the plurality of gate lines, a data driving circuit configured to convert digital image data into an analog data voltage and supply the analog data voltage to the plurality of data lines, a timing controller configured to control the gate driving circuit and the data driving circuit, a first gamma circuit generating a first gamma voltage corresponding to a first pixel during a period corresponding to a first color selection signal, and a second gamma circuit generating a second gamma voltage corresponding to a second pixel during a period corresponding to a second color selection signal different from the first color selection signal.

公开(公告)号：US12119795B2

公开(公告)日：2024-10-15

申请号：US18501389

申请日：2023-11-03

Applicant: LG Display Co., Ltd.

Inventor： HongJu Lee ,  Hyunwoo Kim ,  Beom-Jin Kim

IPC: G09G3/3275 ,  H03F3/21

CPC classification number: H03F3/211 ,  G09G3/3275 ,  G09G2310/0291 ,  G09G2320/0252 ,  G09G2330/021 ,  H03F2200/366 ,  H03F2200/87

Abstract: Disclosed is an amplifier circuit comprising a first stage having first and second input terminals, a second stage configured to amplify a voltage supplied from the first stage and including a pull-up node and a pull-down node, a third stage including an output terminal, a tenth PMOS transistor, and a tenth NMOS transistors having gate electrodes respectively connected to the pull-up node and the pull-down node of the second stage, the third stage configured to perform a pull-up driving and pull-down driving of the amplified voltage, a first boosting circuit including an eleventh PMOS transistor having a gate electrode connected to the pull-up node and the first boosting circuit configured to increase a current in the first stage, and a second boosting circuit including an eleventh NMOS transistor having a gate electrode connected to the pull-down node and configured to increase the current in the first stage.

公开(公告)号：US20240160318A1

公开(公告)日：2024-05-16

申请号：US18505415

申请日：2023-11-09

Applicant: LG Display Co., Ltd.

Inventor： HwiDeuk Lee ,  Beom-Jin Kim ,  HyeongWon Kang ,  JuHong Kim

IPC: G06F3/041 ,  G06F3/044 ,  G09G3/20 ,  G09G3/3258

CPC classification number: G06F3/04184 ,  G06F3/0412 ,  G06F3/0446 ,  G09G3/2074 ,  G09G3/3258 ,  G06F2203/04111 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2354/00

Abstract: Embodiments of the disclosure relate to a touch display device and a touch sensing method and may specifically include a first pixel area, a first touch sensor area positioned on one side of the first pixel area, a first subpixel disposed in the first pixel area and including a light emitting element and a scanning transistor, a first display driving line connected to the first subpixel, a first touch sensor disposed in the first touch sensor area, a first sensing line disposed adjacent to the first touch sensor, a first touch line electrically connected to the first touch sensor, and a first sensing transistor controlling an electrical connection between the first sensing line and the first touch sensor, thereby removing a ghost touch that may occur due to temperature influence.

公开(公告)号：US11762503B2

公开(公告)日：2023-09-19

申请号：US17978766

申请日：2022-11-01

Applicant: LG Display Co., Ltd.

Inventor： HyeongWon Kang ,  Beom-Jin Kim

IPC: G06F3/041

CPC classification number: G06F3/04166

Abstract: Embodiments of the disclosure relate to a touch driving circuit and a touch display device. There may be provided a touch driving circuit capable of attenuating noise in the touch sensing signal and enhancing the output signal by the integrator by transferring charge through a sample-and-hold driving path and a bypass driving path, inverting the polarity of the charge sampled by the sampling switching block, and increasing the number of times of sampling. Further, as the amount of charge transferred by the offset voltage control switch included in the sample-and-hold driving path and bypass driving path may be adjusted within an offset voltage range, the performance of touch sensing may be enhanced.

公开(公告)号：US11114039B2

公开(公告)日：2021-09-07

申请号：US16702922

申请日：2019-12-04

Applicant: LG Display Co., Ltd.

Inventor： Sojung Jung ,  Beom-Jin Kim ,  Bongchoon Kwak

IPC: G09G3/32 ,  G09G3/3291 ,  G02B27/01

Abstract: A micro-display device comprises a silicon substrate in which a plurality of gate lines, a plurality of data lines, a plurality of emission signal lines, and a plurality of subpixels are disposed; a gate driver circuit disposed on a first side of a pixel array to drive the plurality of gate lines; an emission driver circuit driving the plurality of emission signal lines and disposed on a second side of the pixel array different from the first side of the pixel array where the gate driver circuit is disposed; a data driver circuit disposed on a third side of the pixel array to drive the plurality of data lines; a memory storing duty data regarding duty ratios of an emission signal applied to the plurality of emission signal lines; and a control circuit controlling signals applied to the gate driver circuit, the data driver circuit and the emission driver circuit, wherein the control circuit is set to have different emission times with respect to subpixels connected to the plurality of emission signal lines according to the duty data stored in the memory.