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：US10761633B2

公开(公告)日：2020-09-01

申请号：US16216252

申请日：2018-12-11

Applicant: LG Display Co., Ltd.

Inventor： HyeongWon Kang ,  HongJu Lee

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/0354 ,  H01L27/32

Abstract: A touch display device, a touch driving circuit, and a touch-sensing method are disclosed in which control operation timing at which a charge control circuit connected to an input terminal of a pre-amplifier is controlled in consideration of a difference in a location or time constant for each touch electrode. Accordingly, unnecessary variation in a signal-to-noise ratio for each touch electrode can be reduced, and thus touch sensitivity can be improved.

公开(公告)号：US20230229251A1

公开(公告)日：2023-07-20

申请号：US18189067

申请日：2023-03-23

Applicant: LG Display Co., Ltd.

Inventor： HongJu Lee ,  HyeongWon Kang ,  Youngwoo Jo

IPC: G06F3/041 ,  G02F1/1333 ,  G02F1/1343 ,  G02F1/1362 ,  G06F3/044 ,  G09G3/36

CPC classification number: G06F3/0412 ,  G06F3/0418 ,  G02F1/13338 ,  G02F1/134309 ,  G02F1/136286 ,  G06F3/044 ,  G09G3/3677 ,  G09G3/3688 ,  G02F2201/121 ,  G02F2201/123 ,  G06F2203/04112 ,  G09G2310/027 ,  G09G2310/0286 ,  G09G2310/0289 ,  G09G2310/0291

Abstract: The present embodiments may provide a touch display device including: a display panel in which a plurality of data lines, a plurality of gate lines, and a plurality of touch electrodes are disposed; a gate-driving circuit configured to drive the plurality of gate lines; a data-driving circuit configured to drive the plurality of data lines; and a touch-driving circuit configured to drive the plurality of touch electrodes while the plurality of data lines and the plurality of gate lines are driven. In this touch display device, while a touch-driving signal swings with a predetermined amplitude, a data signal and a gate signal may also swing with the predetermined amplitude. According to the present embodiments, it is possible to enable high-speed image display and high-speed touch sensing, to perform a display operation and a touch operation simultaneously, and to display an image normally without any image change.

公开(公告)号：US11281332B2

公开(公告)日：2022-03-22

申请号：US17122162

申请日：2020-12-15

Applicant: LG Display Co., Ltd.

Inventor： HongJu Lee

IPC: G06F3/041

Abstract: Embodiments of the present disclosure relate to a touch display device, a touch driving circuit, and a touch sensing method, and enable differential sensing using a single-ended amplifier without using a differential amplifier, thereby not only accurately sensing a touch during display driving, but also significantly reducing the number of circuit components and the circuit area for differential sensing.

公开(公告)号：US11163398B2

公开(公告)日：2021-11-02

申请号：US17113781

申请日：2020-12-07

Applicant: LG DISPLAY CO., LTD.

Inventor： HyunWoo Jang ,  JuneGun Chung ,  Youngwoo Jo ,  HongJu Lee

IPC: G06F3/041 ,  G06F3/044

Abstract: Provided are a touch display device and a touch driving method thereof. Touch electrodes are grouped into a touch sensing block and non-touch blocks. The touch electrodes in the touch sensing block and the touch electrodes in the non-touch blocks are sensed at different sensing ratios. Power consumption is efficiently managed and sensitivity in touch sensing is maintained.

公开(公告)号：US10943544B2

公开(公告)日：2021-03-09

申请号：US16167957

申请日：2018-10-23

Applicant: LG Display Co., Ltd.

Inventor： HongJu Lee ,  JinBong Chung ,  Beom-Jin Kim

IPC: G09G5/10 ,  G09G3/3291 ,  G09G3/3266 ,  G09G3/3258 ,  G09G3/3233 ,  H01L27/32 ,  G06F3/01

Abstract: An organic light emitting display device and a driving method thereof may turn on first and second transistors, wherein the first transistor electrically connects a data line and a first node of a driving transistor that drives an organic light emitting diode of each sub-pixel, and the second transistor electrically connects a second node of the driving transistor and a reference voltage line, and may provide a detection driving data voltage and a detection driving reference voltage to the first and second nodes of the driving transistor, respectively, to perform initialization; may turn off the first and second transistors to float the first and second nodes of the driving transistor, and may detect one or more from among a short and to an open of the organic light emitting diode by sensing the voltage of the first node or the second node of the driving transistor.

公开(公告)号：US11360620B2

公开(公告)日：2022-06-14

申请号：US16712015

申请日：2019-12-12

Applicant: LG Display Co., Ltd.

Inventor： KiYong Kim ,  HyeongWon Kang ,  Youngwoo Jo ,  HongJu Lee

IPC: G06F3/044

Abstract: A touch display device includes: a touch panel including N touch electrodes; a sensor sensing unit block including M sensor sensing units and to sense two or more touch electrodes among the N touch electrodes; a front multiplexer to select two or more touch electrodes from among the N touch electrodes and connect the selected touch electrodes to the sensor sensing unit block. The front multiplexer is configured to select M touch electrodes, which are disposed in a sensing active region corresponding to a first sensing period, from among the N touch electrodes, and to match and connect the M touch electrodes to the M sensor sensing units, wherein M is greater than or equal to 2, and N is greater than M. The M sensor sensing units are configured to simultaneously sense the M touch electrodes disposed in the sensing active region during the first sensing period.

公开(公告)号：US11036331B2

公开(公告)日：2021-06-15

申请号：US16460697

申请日：2019-07-02

Applicant: LG Display Co., Ltd.

Inventor： HoonBae Kim ,  SunYeop Kim ,  SungHoon Lee ,  SeungMok Shin ,  SungChul Kim ,  Youngwoo Jo ,  Seongkyu Kang ,  HongJu Lee

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/0354 ,  G06F3/038

Abstract: A touch display device accurately distinguishes a touch input performed using a finger and a touch input performed using a pen, such as a stylus, significantly reduce a touch sensing time, simultaneously perform a display operation and a touch sensing operation, and operate in a power saving manner. Touch sensing does not restrict an image display time of a display panel. Touch inputs are sensed without degradation in touch performance, which would otherwise be caused by parasitic capacitance occurring in electrodes within the display panel, such as data lines or gate lines.

公开(公告)号：US10521035B2

公开(公告)日：2019-12-31

申请号：US15793612

申请日：2017-10-25

Applicant: LG Display Co., Ltd.

Inventor： HyeongWon Kang ,  Beom-Jin Kim ,  HongJu Lee

IPC: G06F3/045 ,  G06F3/041 ,  G06F3/047 ,  G06F3/044

Abstract: A touch display device and a driving circuit are disclosed in which the driving circuit is included in the touch display device. The driving circuit may be capable of reducing a chip size and power consumption by configuring an amplifier disposed in an output terminal of a data voltage to be electrically coupled with a feedback capacitor through a switch, and enabling both display driving and touch sensing to be performed through ON/OFF control of the switch. Further, the accuracy and performance of touch sensing may be improved by adjusting an ON/OFF operation of a switch and the number of amplifiers electrically coupled with the feedback capacitor, and a circuit structure for touch driving may be further simplified by generating a load-free driving voltage output in a touch driving period using the amplifiers and a digital-to-analog converter within the driving circuit.