公开(公告)号：US10902795B2

公开(公告)日：2021-01-26

申请号：US16728648

申请日：2019-12-27

Applicant: LG Display Co., Ltd.

Inventor： Jongmin Park ,  Dongwon Park ,  Yongchul Kwon

IPC: G09G3/3291 ,  G09G3/3266 ,  G09G3/3225 ,  H01L27/32

Abstract: A pixel for an organic light emitting diode (OLED) display and an OLED display are discussed. The pixel includes a driving transistor, a first transistor, a scan transistor, a first emission control transistor, and an initialization control transistor. The driving transistor includes a gate electrode connected to a first node, a drain electrode connected to a second node, and a source electrode connected to a third node. The first transistor is connected between the first node and the second node. The scan transistor is connected between the third node and a data line. The first emission control transistor is connected between the second node and an anode electrode of an organic light emitting diode. The initialization control transistor is connected between an input terminal of an initialization voltage and the anode electrode of the organic light emitting diode.

公开(公告)号：US20160189597A1

公开(公告)日：2016-06-30

申请号：US14965713

申请日：2015-12-10

Applicant: LG Display Co., Ltd.

Inventor： Dongwon Park ,  Yongchul Kwon

IPC: G09G3/20 ,  G09G3/32

CPC classification number: G09G3/2074 ,  G09G3/2022 ,  G09G3/3225 ,  G09G3/3258 ,  G09G2310/0251 ,  G09G2310/061 ,  G09G2320/0233

Abstract: A data driver supplies a data signal to a display panel to control luminance of a plurality of pixels. The data signal comprises a plurality of frames, and each of the frames comprises a plurality of sub-frames. Each of the sub-frames comprises an addressing time, followed by an emission time, followed by an erase time. Subpixels each include a first scan line switch controlled by the first scan line signal to turn on during the addressing time of each sub-frame and to turn off during the emission time and the erase time of each sub-frame. A second scan line switch is controlled by a second scan line signal to provide a discharge path to discharge the storage capacitor during the erase time of each sub-frame.

Abstract translation: 数据驱动器将数据信号提供给显示面板以控制多个像素的亮度。 数据信号包括多个帧，并且每个帧包括多个子帧。 每个子帧包括寻址时间，随后是发射时间，随后是擦除时间。 子像素每个包括由第一扫描线信号控制的第一扫描线开关，以在每个子帧的寻址时间期间导通，并在每个子帧的发射时间和擦除时间期间关断。 第二扫描线开关由第二扫描线信号控制，以在每个子帧的擦除时间期间提供放电路径以放电存储电容器。

公开(公告)号：US09412304B2

公开(公告)日：2016-08-09

申请号：US14965726

申请日：2015-12-10

Applicant: LG Display Co., Ltd.

Inventor： Dongwon Park ,  Heejung Hong ,  Younghwan Ahn ,  Jongmin Park ,  Joonhee Lee ,  Yongchul Kwon

IPC: H04W4/00 ,  G09G3/32

CPC classification number: G09G3/3258 ,  G09G3/007 ,  G09G3/3233 ,  G09G2310/08 ,  G09G2320/02 ,  G09G2320/045 ,  G09G2320/046 ,  G09G2320/048 ,  G09G2330/021 ,  G09G2330/04 ,  G09G2360/16

Abstract: A special mode processor drives a display panel to display an image. When the display panel is configured to operate in a special operation mode, the special operation mode processor determines a pixel block size for blocking the plurality of pixels into a plurality of pixel blocks and determines a first set of on-pixels and a first set of off-pixels. The first set of on-pixels is initially turned on and the first set of off-pixels is initially turned off. A drive history representative value is generated for the first group of pixels that represents a drive time and drive characteristic for the first group of pixels. The drive history representative value is compared with a threshold value. Responsive to the drive history representative value exceeding the threshold value, a second set of on-pixels and a second set of off-pixels are turned on and off respectively.

Abstract translation: 特殊模式处理器驱动显示面板显示图像。 当显示面板被配置为在特殊操作模式下操作时，特殊操作模式处理器确定用于将多个像素阻挡成多个像素块的像素块大小，并且确定第一组像素和第一组 离像素。 第一组像素最初被打开，第一组离像素最初被关闭。 为表示第一组像素的驱动时间和驱动特性的第一组像素生成驱动历史代表值。 将驱动历史代表值与阈值进行比较。 响应于超过阈值的驱动历史代表值，分别打开和关闭第二组像素和第二组离像素。

公开(公告)号：US09911374B2

公开(公告)日：2018-03-06

申请号：US14966169

申请日：2015-12-11

Applicant: LG Display Co., Ltd.

Inventor： Dongwon Park ,  Yongchul Kwon

IPC: G09G3/20 ,  G09G3/3225 ,  G09G3/3258

CPC classification number: G09G3/2022 ,  G09G3/3225 ,  G09G3/3258 ,  G09G2300/0861 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0266 ,  G09G2320/029 ,  G09G2320/045 ,  G09G2320/0693 ,  G09G2330/021 ,  G09G2330/025 ,  G09G2360/16

Abstract: A display device is provided for dividing one frame period into a plurality of subframe periods, separating data of an input image on a per bit basis, mapping the data of the input image to the subframe periods, and representing gray levels of the input image. The display device includes a measurement unit configured to measure a current of a pixel; a luminance error calculation unit configured to calculate a rush current of the pixel emitting light at the measured current value, and to calculate a luminance error of the pixel based on the rush current; and a luminance error compensation unit configured to reduce an emission time of one of the subframe periods or remap the subframe periods to compensate for the luminance error.

公开(公告)号：US09401108B2

公开(公告)日：2016-07-26

申请号：US14965713

申请日：2015-12-10

Applicant: LG Display Co., Ltd.

Inventor： Dongwon Park ,  Yongchul Kwon

IPC: G09G3/32 ,  G09G3/20

CPC classification number: G09G3/2074 ,  G09G3/2022 ,  G09G3/3225 ,  G09G3/3258 ,  G09G2310/0251 ,  G09G2310/061 ,  G09G2320/0233

Abstract: A data driver supplies a data signal to a display panel to control luminance of a plurality of pixels. The data signal comprises a plurality of frames, and each of the frames comprises a plurality of sub-frames. Each of the sub-frames comprises an addressing time, followed by an emission time, followed by an erase time. Subpixels each include a first scan line switch controlled by the first scan line signal to turn on during the addressing time of each sub-frame and to turn off during the emission time and the erase time of each sub-frame. A second scan line switch is controlled by a second scan line signal to provide a discharge path to discharge the storage capacitor during the erase time of each sub-frame.

Abstract translation: 数据驱动器将数据信号提供给显示面板以控制多个像素的亮度。 数据信号包括多个帧，并且每个帧包括多个子帧。 每个子帧包括寻址时间，随后是发射时间，随后是擦除时间。 子像素每个包括由第一扫描线信号控制的第一扫描线开关，以在每个子帧的寻址时间期间导通，并在每个子帧的发射时间和擦除时间期间关断。 第二扫描线开关由第二扫描线信号控制，以在每个子帧的擦除时间期间提供放电路径以放电存储电容器。

公开(公告)号：US20160189619A1

公开(公告)日：2016-06-30

申请号：US14965726

申请日：2015-12-10

Applicant: LG Display Co., Ltd.

Inventor： Dongwon Park ,  Heejung Hong ,  Younghwan Ahn ,  Jongmin Park ,  Joonhee Lee ,  Yongchul Kwon

IPC: G09G3/32

CPC classification number: G09G3/3258 ,  G09G3/007 ,  G09G3/3233 ,  G09G2310/08 ,  G09G2320/02 ,  G09G2320/045 ,  G09G2320/046 ,  G09G2320/048 ,  G09G2330/021 ,  G09G2330/04 ,  G09G2360/16

Abstract: A special mode processor drives a display panel to display an image. When the display panel is configured to operate in a special operation mode, the special operation mode processor determines a pixel block size for blocking the plurality of pixels into a plurality of pixel blocks and determines a first set of on-pixels and a first set of off-pixels. The first set of on-pixels is initially turned on and the first set of off-pixels is initially turned off. A drive history representative value is generated for the first group of pixels that represents a drive time and drive characteristic for the first group of pixels. The drive history representative value is compared with a threshold value. Responsive to the drive history representative value exceeding the threshold value, a second set of on-pixels and a second set of off-pixels are turned on and off respectively.

Abstract translation: 特殊模式处理器驱动显示面板显示图像。 当显示面板被配置为在特殊操作模式下操作时，特殊操作模式处理器确定用于将多个像素阻挡成多个像素块的像素块大小，并且确定第一组像素和第一组 离像素。 第一组像素最初被打开，第一组离像素最初被关闭。 为表示第一组像素的驱动时间和驱动特性的第一组像素生成驱动历史代表值。 将驱动历史代表值与阈值进行比较。 响应于超过阈值的驱动历史代表值，分别打开和关闭第二组像素和第二组离像素。

公开(公告)号：US10733936B2

公开(公告)日：2020-08-04

申请号：US15841766

申请日：2017-12-14

Applicant: LG Display Co., Ltd.

Inventor： Joonhee Lee ,  Janghwan Kim ,  Dongwon Park ,  Jongmin Park ,  Yongchul Kwon

IPC: G09G3/3258 ,  G09G3/3225 ,  G09G3/20 ,  G09G3/3275 ,  H01L27/32

Abstract: An organic light-emitting display device and a method of driving the same are disclosed. The organic light-emitting display device includes a display panel including sub-pixels, a power supply configured to output a voltage for driving the sub-pixels, a selective driver configured to generate a control signal to selectively drive a drive transistor of the sub-pixels between first and second driving schemes, wherein the drive transistor is driven in a saturation region in the first driving scheme, and is driven in a linear region in the second driving scheme, and a gamma change driver configured to change a gamma based on the driving scheme selected by the selective driver.

公开(公告)号：US20200211476A1

公开(公告)日：2020-07-02

申请号：US16728648

申请日：2019-12-27

Applicant: LG Display Co., Ltd.

Inventor： Jongmin PARK ,  Dongwon PARK ,  Yongchul Kwon

IPC: G09G3/3291 ,  G09G3/3266 ,  G09G3/3225 ,  H01L27/32

Abstract: A pixel for an organic light emitting diode (OLED) display and an OLED display are discussed. The pixel includes a driving transistor, a first transistor, a scan transistor, a first emission control transistor, and an initialization control transistor. The driving transistor includes a gate electrode connected to a first node, a drain electrode connected to a second node, and a source electrode connected to a third node. The first transistor is connected between the first node and the second node. The scan transistor is connected between the third node and a data line. The first emission control transistor is connected between the second node and an anode electrode of an organic light emitting diode. The initialization control transistor is connected between an input terminal of an initialization voltage and the anode electrode of the organic light emitting diode.

公开(公告)号：US10276099B2

公开(公告)日：2019-04-30

申请号：US15392721

申请日：2016-12-28

Applicant: LG DISPLAY CO., LTD.

Inventor： Joonhee Lee ,  Heejung Hong ,  Dongwon Park ,  Jongmin Park ,  Yongchul Kwon

IPC: G09G3/3258 ,  G09G3/3233 ,  G09G3/20

Abstract: Disclosed is an organic light emitting diode (OLED) display that includes a display panel including a plurality of gate lines and a plurality of data lines crossing each other to define a plurality of pixels, each pixel including a driving transistor, a switching transistor, an OLED and a storage capacitor; a timing controller that receives pixel data of an input image and timing signals and time-divides a period of one frame into at least a driving sub-frame and a compensation sub-frame based on one or more of the timing signals; and a display panel driver that converts the pixel data into data voltages and supplies the data voltages to the plurality of data lines during the driving sub-frame, and that adjusts compensation gray levels of the plurality of pixels or compensation duties of the plurality of pixels based on a luminance map, which contains information on a luminance deviation for each pixel with respect to a same gray level, during the compensation sub-frame.

公开(公告)号：US10102802B2

公开(公告)日：2018-10-16

申请号：US15393662

申请日：2016-12-29

Applicant: LG Display Co., Ltd.

Inventor： Yongchul Kwon ,  Dongwon Park ,  Jongmin Park ,  Joonhee Lee

IPC: G09G5/10 ,  G09G3/3233 ,  G09G3/3275 ,  G09G3/3266

Abstract: An organic light-emitting display device including a display panel, a power supply, a selective driver and a gamma change driver is disclosed. The display panel includes sub-pixels. The power supply is configured to output a drive voltage for driving the sub-pixels. The selective driver is configured to generate a control signal to enable selective drive between first and second driving schemes for a drive transistor in each sub-pixel, wherein the first and second schemes employ saturation and linear regions of the drive voltage curve respectively. The gamma change driver is configured to change a gamma based on the driving scheme selected by the selective driver.