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：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：US11081062B2

公开(公告)日：2021-08-03

申请号：US16573675

申请日：2019-09-17

Applicant: LG Display Co., Ltd.

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

IPC: G09G3/3283 ,  G09G3/3233 ,  G09G3/3258 ,  G01R17/02 ,  H04N5/357

Abstract: The current sensing device in the present disclosure comprises a plurality of sensing units each of which is connected to a sensing channel. The sensing unit may comprise a reference current generator generating a reference current; a current comparator outputting a comparator output signal based on a pixel current input through the sensing channel and the reference current, and removing an offset deviation component included in the pixel current and the reference current by using a reset current externally applied; and an edge triggered data flip-flop outputting a digital sensing value corresponding to the pixel current based on the comparator output signal.

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：US10236335B2

公开(公告)日：2019-03-19

申请号：US15806049

申请日：2017-11-07

Applicant: LG Display Co., Ltd.

Inventor： Hyemi Oh ,  Bumsik Kim ,  Younsub Kim

IPC: H01L27/32

Abstract: The present disclosure is provided a display device. The display device includes subpixels and at least one scan line. The subpixels are formed on a first substrate, and each of the subpixels includes an emission area, in which a light emitting element for emitting light is disposed, and a circuit area in which a circuit for driving the light emitting element is disposed. The at least one scan line may be disposed on the circuit area in a horizontal direction. The at least one scan line may include: an upper scan line and a lower scan line spaced apart from each other; and a scan connection line positioned between the upper scan line and the lower scan line and electrically connecting the upper scan line and the lower scan line.

公开(公告)号：US09542873B2

公开(公告)日：2017-01-10

申请号：US15137790

申请日：2016-04-25

Applicant: LG DISPLAY CO., LTD.

Inventor： Sangho Yu ,  Bumsik Kim

IPC: G09G3/00 ,  G09G3/32 ,  G09G3/20

CPC classification number: G09G3/006 ,  G09G3/2007 ,  G09G3/3258 ,  G09G3/3291 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0828 ,  G09G2310/027 ,  G09G2320/0295 ,  G09G2320/045 ,  G09G2320/0693 ,  G09G2330/12

Abstract: An organic light emitting display comprises: a display panel with a plurality of pixels connected to data lines and sensing lines, each pixel comprising an OLED and a driving TFT for controlling the amount of light emission of the OLED; and a data driver IC comprising a plurality of sensing units for sensing current data of the pixels through a plurality of sensing channels connected to the sensing lines, each sensing unit comprising: a first current integrator connected to an odd sensing channel; a second current integrator connected to an even sensing channel neighboring the odd sensing channel; and a sample & hold unit that removes common noise components from a first sampled value input from the first current integrator and a second sampled value input from the second current integrator while storing and holding the first and second sampled values.

Abstract translation: 有机发光显示器包括：具有连接到数据线和感测线的多个像素的显示面板，每个像素包括OLED和用于控制OLED的发光量的驱动TFT; 以及数据驱动器IC，其包括多个感测单元，用于通过连接到感测线的多个感测通道来感测像素的当前数据，每个感测单元包括：连接到奇数感测通道的第一电流积分器; 连接到与奇数感测通道相邻的偶数感测通道的第二电流积分器; 以及采样保持单元，其从存储并保持第一和第二采样值的第一电流积分器输入的第一采样值和从第二电流积分器输入的第二采样值中去除公共噪声分量。

公开(公告)号：US09349311B2

公开(公告)日：2016-05-24

申请号：US14582882

申请日：2014-12-24

Applicant: LG DISPLAY CO., LTD.

Inventor： Sangho Yu ,  Bumsik Kim

IPC: G09G3/32 ,  G09G3/00

CPC classification number: G09G3/006 ,  G09G3/2007 ,  G09G3/3258 ,  G09G3/3291 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0828 ,  G09G2310/027 ,  G09G2320/0295 ,  G09G2320/045 ,  G09G2320/0693 ,  G09G2330/12

Abstract: An organic light emitting display comprises: a display panel with a plurality of pixels connected to data lines and sensing lines, each pixel comprising an OLED and a driving TFT for controlling the amount of light emission of the OLED; and a data driver IC comprising a plurality of sensing units for sensing current data of the pixels through a plurality of sensing channels connected to the sensing lines, each sensing unit comprising: a first current integrator connected to an odd sensing channel; a second current integrator connected to an even sensing channel neighboring the odd sensing channel; and a sample & hold unit that removes common noise components from a first sampled value input from the first current integrator and a second sampled value input from the second current integrator while storing and holding the first and second sampled values.

Abstract translation: 有机发光显示器包括：具有连接到数据线和感测线的多个像素的显示面板，每个像素包括OLED和用于控制OLED的发光量的驱动TFT; 以及数据驱动器IC，其包括多个感测单元，用于通过连接到感测线的多个感测通道来感测像素的当前数据，每个感测单元包括：连接到奇数感测通道的第一电流积分器; 连接到与奇数感测通道相邻的偶数感测通道的第二电流积分器; 以及采样保持单元，其从存储并保持第一和第二采样值的第一电流积分器输入的第一采样值和从第二电流积分器输入的第二采样值中去除公共噪声分量。