公开(公告)号：US10467960B2

公开(公告)日：2019-11-05

申请号：US15858917

申请日：2017-12-29

Applicant: LG Display Co., Ltd.

Inventor： Osung Do ,  Kyoungdon Woo ,  Hyuckjun Kim ,  Jaeyoon Bae

IPC: G09G3/34 ,  G09G3/3233

Abstract: The present disclosure relates to an electroluminescent display device and a driving method of the same. The electroluminescent display device comprises a display panel, including a plurality of data lines, a plurality of sensing lines, a plurality of gate lines, and pixels which are arranged in matrix at each intersection between those lines to form a plurality of display lines; a sensing circuit, for sensing a pixel current in the pixels, integrating the pixel current to obtain a sensing voltage, and generating a sensing data based on the sensing voltage during a sensing operation period; and a compensation unit for calculating a compensation value for electrical characteristics of the pixels based on the sensing data.

公开(公告)号：US10311788B2

公开(公告)日：2019-06-04

申请号：US15816553

申请日：2017-11-17

Applicant: LG DISPLAY CO., LTD.

Inventor： Myunggi Lim ,  Kyoungdon Woo ,  Jaeyoon Bae

IPC: G09G3/36 ,  G09G3/3233

Abstract: An organic light-emitting display includes a driving transistor that drives an organic light-emitting diode, a first transistor connected between a data line supplying a data voltage and a gate electrode of the driving transistor, a second transistor connected between a reference voltage input line and a source electrode of the driving transistor, and a third transistor that directly charges the gate electrode of the driving transistor with a reference voltage supplied from the reference voltage input line, in response to a black data control signal, wherein the third transistor directly receives the reference voltage by being turned on for a certain period of time after the gate electrode of the driving transistor is programmed with the data voltage in one frame before receiving a data voltage in the next frame.

公开(公告)号：US09852697B2

公开(公告)日：2017-12-26

申请号：US14854301

申请日：2015-09-15

Applicant: LG Display Co., Ltd.

Inventor： Myunggi Lim ,  Kyoungdon Woo

IPC: G09G3/32 ,  G09G3/3275 ,  G09G3/3233

CPC classification number: G09G3/3275 ,  G09G3/3233 ,  G09G2300/0828 ,  G09G2320/0233 ,  G09G2320/0271 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2320/0626 ,  G09G2330/028

Abstract: An organic light emitting diode display includes a display panel including a plurality of pixels, each pixel including an organic light emitting diode (OLED) and a driving thin film transistor (TFT) configured to control an amount of current flowing in the OLED depending on a difference between a data voltage and a reference voltage, a source driver integrated circuit (IC) configured to produce the data voltages corresponding to data of an input image and apply the data voltages to data lines connected to the pixels, an image analyzer configured to analyze the data of the input image and produce reference voltage control data, and a reference voltage regulator configured to produce the reference voltages varying depending on the input image based on the reference voltage control data and apply the reference voltages to reference lines connected to the pixels.

公开(公告)号：US10964273B2

公开(公告)日：2021-03-30

申请号：US16593182

申请日：2019-10-04

Applicant: LG Display Co., Ltd.

Inventor： Hyemi Oh ,  Minkyu Song ,  Jisu Choi ,  Byungjae Lee ,  Myunggi Lim ,  Kyoungdon Woo ,  Seungtae Kim ,  Bumsik Kim

IPC: G09G3/3291

Abstract: A pixel sensing device, an organic light emitting display device and a pixel compensation method thereof are disclosed. The pixel sensing device comprises a plurality of current integrators for sensing driving characteristics of pixels. Each current integrator comprises: an operational amplifier equipped with an inverting input terminal to which a first input voltage is applied according to a pixel current of the pixels, a non-inverting input terminal to which a second input voltage is applied according to the pixel current, and an output terminal through which an integral voltage corresponding to the pixel current is output; and a feedback capacitor connected between the inverting input terminal and the output terminal. The operational amplifier comprises: a pre-amplifying unit for lowering an amplifier input gain and being equipped with the inverting and non-inverting input terminals; and two gain amplifying units for receiving an output of the pre-amplifying unit and for making an amplifier output gain higher than the amplifier input gain.

公开(公告)号：US10274734B2

公开(公告)日：2019-04-30

申请号：US15679777

申请日：2017-08-17

Applicant: LG Display Co., Ltd.

Inventor： Kyoungdon Woo ,  Jaeyoon Bae

IPC: G09G3/00 ,  G02B27/00 ,  G02B27/01

Abstract: A personal immersive display device and a driving method thereof are disclosed. The display device comprises a first display panel to which first content data is provided; a second display panel to which second content data is provided; a camera that receives data associated with positions of a user's left pupil and right pupil; and a data processor that processes the data associated with the position of the user's left pupil and right pupil to determine a right gaze point and a left gaze point, detects a first gaze area on the first display panel and a second gaze area on the second display panel based on the right gaze point and left gaze point, wherein the data processor reduces resolution or brightness of the first and second content data provided to areas outside the first gaze area and second gaze area.

公开(公告)号：US20180174516A1

公开(公告)日：2018-06-21

申请号：US15835774

申请日：2017-12-08

Applicant: LG Display Co., Ltd.

Inventor： Hyuckjun Kim ,  Bumsik Kim ,  Jaeyoon Bae ,  Seungtae Kim ,  Kyoungdon Woo

IPC: G09G3/3233 ,  H01L51/52 ,  H01L27/32

CPC classification number: G09G3/3233 ,  G09G3/2081 ,  G09G2310/0205 ,  G09G2310/0264 ,  G09G2310/04 ,  G09G2320/103 ,  G09G2360/16 ,  H01L27/3276 ,  H01L51/5203

Abstract: A display device includes a display panel on which a plurality of pixels connected to data lines, reference lines, and gate lines are arranged, each pixel having an organic light emitting diode (OLED) and a driving thin film transistor (TFT); a data drive circuit to supply a data voltage to the data lines and a reference voltage to the reference lines; a gate drive circuit to generate a scan signal and a sensing signal and to supply the scan signal and the sensing signal to the gate lines, the scan signal being synchronized with the data voltage and the sensing signal being synchronized with the reference voltage; and a timing controller to divide one frame into a programming time, an emission time, and a non-emission time, and to control an emission duty by variably controlling the programming time based on an analysis of input image data.

公开(公告)号：US11588993B2

公开(公告)日：2023-02-21

申请号：US16583670

申请日：2019-09-26

Applicant: LG Display Co., Ltd.

Inventor： Taeyoung Lee ,  Myunggi Lim ,  Kyoungdon Woo ,  Bumsik Kim ,  Seungtae Kim ,  Byungjae Lee ,  Minkyu Song

IPC: H04N5/369 ,  G09G3/3291 ,  G09G3/3233 ,  H04N5/374

Abstract: A current sensing device and the organic light-emitting display device including the same are disclosed. The current sensing device may include a plurality of sensing units, each sensing unit playing a role of converting a pixel current input through a sensing line into a digital sensing value, and each sensing unit comprising: a current integrator including an integrating amplifier and a feedback capacitor, the integrating amplifier comprising an inverting input terminal, a non-inverting input terminal and an output terminal, wherein the feedback capacitor is connected between the inverting input terminal and the output terminal, and a first reference voltage is input to the non-inverting input terminal; and a current transmitting unit connected between the sensing line and the current integrator to separate the electric connection of the sensing line and the current integrator, wherein the current transmitting unit mirrors the pixel current and causes the mirrored current to be output from the inverting input terminal of the integrating amplifier.

公开(公告)号：US11217171B2

公开(公告)日：2022-01-04

申请号：US16030123

申请日：2018-07-09

Applicant: LG DISPLAY CO., LTD.

Inventor： Dongik Kim ,  Kyoungdon Woo

IPC: G09G3/3258 ,  G09G3/3266 ,  G09G3/3291 ,  G09G3/3233

Abstract: An organic light emitting display and a method of sensing deterioration of the same are discussed. The organic light emitting display includes a display panel including a plurality of display lines, each of the display lines in which a plurality of pixels are arranged, each of the pixels including a light emitting element and a driving element, a panel driver configured to supply a gate signal and a data voltage synchronized with the gate signal to the pixels of the display lines, a sensing unit configured to sense driving characteristics of the pixels, and a timing controller configured to control operation timings of the panel driver and the sensing unit, and overlappingly shift a sensing driving sequence for at least some display lines in accordance with a line sequential manner.

公开(公告)号：US10522077B2

公开(公告)日：2019-12-31

申请号：US15365200

申请日：2016-11-30

Applicant: LG DISPLAY CO., LTD.

Inventor： Kyoungdon Woo ,  Chulwon Lee ,  Myunggi Lim ,  Juyoung Noh

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3283 ,  G09G3/3291

Abstract: An organic light-emitting display can include a display panel including sensing lines connected to pixels; a current integrator configured to receive current from a pixel through a sensing line connected to a first input terminal, receive a reference voltage through a reference voltage line connected to a second input terminal, and swap a path through which the current applied through the first input terminal flows and a path through which the reference voltage applied through the second input terminal is supplied; a sampling part including a first sample and hold circuit for sampling a first output voltage of the current integrator and a second sample and hold circuit for sampling a second output voltage of the current integrator, subsequent to the first output voltage, which outputs the first and second output voltages sampled by the first and second sample and hold circuits simultaneously through a single output channel.

公开(公告)号：US09928782B2

公开(公告)日：2018-03-27

申请号：US15140094

申请日：2016-04-27

Applicant: LG Display Co., Ltd.

Inventor： Osung Do ,  Kyoungdon Woo ,  Seokhyun Hong

IPC: G09G3/3291 ,  G09G3/20

CPC classification number: G09G3/3291 ,  G09G3/2007 ,  G09G2300/0452 ,  G09G2310/027 ,  G09G2310/08 ,  G09G2320/10

Abstract: A four-primary-color organic light emitting display comprises: a display panel where a plurality of first-color pixels, second-color pixels, third-color pixels, and fourth-color pixels are disposed; and a data drive circuit that has a single, digital-to-analog converter to generate first- to fourth-color data voltages and to apply the first-color data voltage to the first-color pixels, the second-color data voltage to the second-color pixels, the third-color data voltage to the third-color pixels, and the fourth-color data voltage to the fourth-color pixels. Herein, the maximum grayscale voltages for the first- to fourth-color data voltages are adjusted to be different on a single gamma graph defined as the input grayscale versus output voltage.