公开(公告)号：US11328664B2

公开(公告)日：2022-05-10

申请号：US16693153

申请日：2019-11-22

Applicant: LG Display Co., Ltd.

Inventor： Seokhyun Hong ,  Changwoo Lee

IPC: G09G3/3233 ,  G09G3/3241 ,  G09G3/325

Abstract: The present disclosure relates to a pixel sensing device and the organic light emitting display device including the same which reduce or minimize the influence of the panel noise and improve sensing accuracy and sensing reliability. The pixel sensing device includes a current integrator connected to a pixel through a sensing line of a display panel and integrating a pixel current flowing through the pixel to generate an integrator output voltage; a sample and hold unit sampling and holding the integrator output voltage; an analog to digital converter (ADC) converting the integrator output voltage output from the sample and hold unit into a digital signal; and a first capacitor serving to reduce or minimize a distortion degree of the integrator output voltage due to panel noise mixed to the pixel current.

公开(公告)号：US10515589B2

公开(公告)日：2019-12-24

申请号：US15685377

申请日：2017-08-24

Applicant: LG Display Co., Ltd.

Inventor： Hyuckjun Kim ,  Seokhyun Hong ,  Myunggi Lim

IPC: G09G3/3241 ,  G09G3/3291 ,  H01L51/50 ,  H05B33/08 ,  G09G3/3233

Abstract: The present invention provides an OLED display device including a display panel, a data driver and a timing controller. The display panel has sub-pixels for displaying images. The data driver supplies a data signal to data lines of the sub-pixels. The timing controller supplies the data signal to the data driver and controls the data driver. The data driver outputs a stress prevention voltage for preventing application of stress to driving transistors included in the sub-pixels in response to a stress compensation signal output from the timing controller, and the stress prevention voltage is applied to M (M being an integer equal to or greater than 1) sub-pixels selected per frame.

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.

公开(公告)号：US09941018B2

公开(公告)日：2018-04-10

申请号：US14857411

申请日：2015-09-17

Applicant: LG DISPLAY CO., LTD.

Inventor： Seokhyun Hong ,  Chulwon Lee ,  Juyoung Noh ,  Osung Do

IPC: G09G5/00 ,  G11C19/00 ,  G09G3/20 ,  G11C19/28 ,  G09G3/3266 ,  G09G3/36

CPC classification number: G11C19/00 ,  G09G3/20 ,  G09G3/3266 ,  G09G3/3674 ,  G09G2310/0218 ,  G09G2310/0267 ,  G09G2310/0286 ,  G11C19/287

Abstract: A gate driving circuit and a display device using the same are discussed. The gate driving circuit according to an embodiment includes a first shift register configured to sequentially shift a gate start pulse in response to a gate shift clock and output a gate pulse shifted on a per block basis, each block including a plurality of gate lines, a second shift register configured to sequentially shift the gate start pulse in response to the gate shift clock and output a gate pulse shifted on a per gate line basis, and a controller configured to supply the gate shift clock to one of the first and second shift registers.

公开(公告)号：US11107420B2

公开(公告)日：2021-08-31

申请号：US15814174

申请日：2017-11-15

Applicant: LG Display Co., Ltd.

Inventor： Seokhyun Hong ,  Jaeyoon Bae ,  OSung Do ,  Taeyoung Lee

IPC: G09G3/32 ,  G09G3/3291 ,  G09G3/3275 ,  G09G3/3233 ,  G09G3/3258 ,  G09G3/00 ,  G09G3/36

Abstract: The display device according to the present disclosure may comprise a display panel equipped with a plurality of pixels connected to data lines and sensing lines; a source drive IC configured to provide a data voltage to a pixel through the sensing line and equipped with a sensing block obtaining sensing data related to driving characteristics of the pixel using a signal input through the sensing line; a switch configured to control a connection via the sensing line between the pixel and the sensing block; and a power source configured to provide a test voltage or a test current to the sensing block, and the source drive IC may obtain calibration data for the sensing block by using the test voltage or the test current in a state that the switch disconnects the pixel and the sensing block.

公开(公告)号：US10249244B2

公开(公告)日：2019-04-02

申请号：US15631860

申请日：2017-06-23

Applicant: LG Display Co., Ltd.

Inventor： Seungtae Kim ,  Myunggi Lim ,  Seokhyun Hong

IPC: G09G5/00 ,  G09G3/3258 ,  G09G3/00

Abstract: An organic light-emitting display comprises: a display panel with a plurality of pixels; a plurality of source driver ICs comprising sensing blocks that are connected to the pixels and sense the electrical characteristics of the pixels; and a calibration block that applies test currents to the sensing blocks in order to sense offset variations between the sensing blocks in a preset calibration mode. The calibration block comprises: a plurality of discrete current sources that generate the test currents; and a switch array that connects the source driver ICs and the discrete current sources, wherein two or more neighboring source driver ICs share one discrete current source, and each source driver IC is selectively connected to two or more discrete current sources.