公开(公告)号：US20210104195A1

公开(公告)日：2021-04-08

申请号：US17060729

申请日：2020-10-01

Applicant: LG DISPLAY CO., LTD.

Inventor： SoekMin CHOI ,  NakJin SEONG ,  MooKyoung HONG

IPC: G09G3/3258

Abstract: The present disclosure relates to display devices and methods of driving the display devices. In accordance with embodiments of the present disclosure, it is possible to improve image quality of a display device by reducing a sensing time for sensing one or more characteristic values of at least one driving transistor disposed in at least one sub-pixel. Further, it is possible to perform optimal sensing and compensation for at least one driving transistor by setting a minimum sensing time for one or more characteristic values of the at least one driving transistor and changing the sensing time according to a sensing available time of the display device.

公开(公告)号：US20150130865A1

公开(公告)日：2015-05-14

申请号：US14524733

申请日：2014-10-27

Applicant: LG DISPLAY CO., LTD.

Inventor： JongSik SHIM ,  MooKyoung HONG ,  Boeon BYEON

IPC: G09G3/32

CPC classification number: G09G3/3233 ,  G09G2300/0842 ,  G09G2320/043

Abstract: The present invention relates to an organic light emitting display device that changes a reference voltage commonly applied to a driving transistor in all pixels, based on a characteristic value sensed according to each pixel.

Abstract translation: 本发明涉及一种有机发光显示装置，其基于根据每个像素感测的特征值，改变在所有像素中共同施加到驱动晶体管的参考电压。

公开(公告)号：US20240221617A1

公开(公告)日：2024-07-04

申请号：US18383390

申请日：2023-10-24

Applicant: LG Display Co., Ltd.

Inventor： MooKyoung HONG

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2310/0275 ,  G09G2330/025 ,  G09G2330/045

Abstract: A light emitting display apparatus can include a power supply unit to supply power to a light emitting display panel having light emitting elements, a printed circuit board on which the power supply unit is mounted, chip-on-films connected between the printed circuit board and the light emitting display panel, data drivers mounted on the chip-on-films, a control driver to control the power supply unit and the data drivers, low-voltage lines extended from the printed circuit board to the light emitting display panel through the chip-on-films, and a main low-voltage line disposed on the printed circuit board and connected to the low-voltage lines and the power supply unit. Also, the light emitting display apparatus can include sensing capacitors connected to the main low-voltage line, in which each of the sensing capacitors is connected to one of the data drivers.

公开(公告)号：US20230197011A1

公开(公告)日：2023-06-22

申请号：US17976548

申请日：2022-10-28

Applicant: LG Display Co., Ltd.

Inventor： MooKyoung HONG ,  Uitaek JEONG ,  HyeonWoo LEE ,  DongKyu YANG ,  SinKyun PARK ,  SeungWon LEE

IPC: G09G3/3266 ,  G09G3/3233 ,  G09G3/3283

CPC classification number: G09G3/3266 ,  G09G3/3233 ,  G09G3/3283 ,  G09G2310/08 ,  G09G2300/0842 ,  G09G2320/0214 ,  G09G2320/045 ,  G09G2300/0413 ,  G09G2330/021 ,  G09G2310/0291

Abstract: A display device can include a display panel having a plurality of subpixels; a gate driving circuit configured to supply a plurality of scan signals to the display panel through a plurality of gate lines, and output a feedback voltage; a data driving circuit configured to supply a plurality of data voltages to the display panel through a plurality of data lines; a power management circuit configured to supply a plurality of driving voltages to the gate driving circuit and the data driving circuit, and supply a compensating high-potential gate voltage to the gate driving circuit based on the feedback voltage transferred from the gate driving circuit. The display device can further include a timing controller configured to control the gate driving circuit, the data driving circuit, and the power management circuit.

公开(公告)号：US20230057700A1

公开(公告)日：2023-02-23

申请号：US17842023

申请日：2022-06-16

Applicant: LG DISPLAY CO., LTD.

Inventor： Jinwon KIM ,  MooKyoung HONG

IPC: G09G3/00 ,  G09G3/20

Abstract: A display device includes a display panel in which a plurality of subpixels including a light emitting element that emits light by a high potential voltage supplied to a driving voltage line, and a plurality of reference voltage lines connected to the plurality of subpixels to detect a characteristic value are disposed; a data driving circuit configured to supply a low potential voltage to the driving voltage line through the plurality of reference voltage lines; a base voltage switching circuit configured to control a ground voltage node connected to a cathode electrode of the light emitting element; a current detecting circuit configured to detect a current flowing between the base voltage node and a ground; and a timing controller configured to control the base voltage switching circuit and generate a defect detection signal for the driving voltage line according to a current detected by the current detecting circuit.

公开(公告)号：US20230043207A1

公开(公告)日：2023-02-09

申请号：US17874585

申请日：2022-07-27

Applicant: LG DISPLAY CO., LTD.

Inventor： MooKyoung HONG ,  Kwangmo PARK

IPC: G09G3/3291

Abstract: A display device may include a display panel and a driver circuit. The display panel may include subpixels, data lines, and reference voltage lines. The driver circuit may drive the data lines. A first subpixel may be connected to a first data line and a first reference voltage line. A driving time of the first subpixel may include a first initialization time in which a reference voltage is applied to the first reference voltage line and a first tracking time in which a voltage of the first reference voltage line increases from the reference voltage. During the first tracking time, a first data signal transferred to the first subpixel through the first data line may be changed from a first voltage value to a reference driving voltage value. The first voltage value may be higher than the reference driving voltage value. The display device may reduce a sensing time.

公开(公告)号：US20230032028A1

公开(公告)日：2023-02-02

申请号：US17858835

申请日：2022-07-06

Applicant: LG Display Co., Ltd.

Inventor： MooKyoung HONG

IPC: G09G3/3291

Abstract: A display device can include a data driving circuit including k sensing terminals and a switching part including a switching element positioned between an outermost sensing terminal among the k sensing terminals and a constant voltage supply terminal, wherein k is a positive integer greater than or equal to 2; and a display panel including a plurality of subpixels and a plurality of sensing lines electrically connected with the plurality of subpixels, wherein the plurality of sensing lines are electrically connected with n sensing terminals among the k sensing terminals disposed in the data driving circuit, where n is a positive integer less than or equal to k and n is greater than or equal to 1.

公开(公告)号：US20220180815A1

公开(公告)日：2022-06-09

申请号：US17525172

申请日：2021-11-12

Applicant: LG Display Co., Ltd.

Inventor： Juwon KIM ,  MooKyoung HONG

IPC: G09G3/3275 ,  G09G3/3266

Abstract: Embodiments of the present disclosure relate to display devices, controllers, and display driving methods for compensating for a difference between respective charges of sub-pixels disposed in different locations in a high temperature condition, and preventing image quality caused by such a charge difference from being degraded.

公开(公告)号：US20220180814A1

公开(公告)日：2022-06-09

申请号：US17525147

申请日：2021-11-12

Applicant: LG Display Co., Ltd.

Inventor： Jinhee JUNG ,  MooKyoung HONG

IPC: G09G3/3275

Abstract: A display device and a driving circuit are discussed. According to an embodiment of the present disclosure, it is possible to stably maintain the output signal of the driving circuit when the lock signal indicating the synchronization state of the clock signal is changed due to an operation error such as overcurrent in a display device using a point-to-point interface. In addition, according to an embodiment of the present disclosure, it is possible to prevent damage to the display panel due to an overload generated in the output signal of the driving circuit by an operation error. In addition, according to an embodiment of the present disclosure, it is possible to prevent overload of the driving circuit and damage to the display panel by controlling the operation of the driving circuit through a differential input voltage between the timing controller and the driving circuit.

公开(公告)号：US20180061321A1

公开(公告)日：2018-03-01

申请号：US15685445

申请日：2017-08-24

Applicant: LG DISPLAY CO., LTD.

Inventor： MooKyoung HONG ,  Nari KIM

IPC: G09G3/3241 ,  G09G3/3258

CPC classification number: G09G3/3241 ,  G09G3/3233 ,  G09G3/3258 ,  G09G2300/0842 ,  G09G2320/0242 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2320/0693

Abstract: A display device includes a display panel, a driver IC, and a control circuit. The control circuit includes operation circuitry to calculate the magnitude of a driving current flowing in a first pixel column in response to first voltage information from the driver IC, where the first voltage information corresponding to a voltage level of a first power supply line applied to a first pixel group of the display panel. The operation circuitry also calculates a compensation gain by comparing the magnitude of the driving current with preset current information. Further, the control circuit includes a compensator to receive a first data signal, generate a second data signal by applying the compensation gain to the first data signal, and transfer the second data signal to the driver IC. The display device and driving method may suppress image quality degradation by monitoring a high-potential voltage and correcting a data signal.