公开(公告)号：US20180061913A1

公开(公告)日：2018-03-01

申请号：US15685887

申请日：2017-08-24

Applicant: LG DISPLAY CO., LTD.

Inventor： Changhee KIM ,  Hyemin PARK

IPC: H01L27/32 ,  G09G3/3225

CPC classification number: H01L27/3244 ,  G09G3/3225 ,  G09G3/3233 ,  G09G2300/0465 ,  G09G2320/0219 ,  G09G2320/0295 ,  G09G2320/045

Abstract: A display and degradation sensing method, includes a display panel having a plurality of pixels that each comprise an Organic Light Emitting Diode (OLED) and Thin Film Transistor (TFT). The pixels are divided into multiple pixel groups of two or more pixels, each connected to different data lines but to the same gate and sensing lines. A gate driving circuit supplies a scan control signal to the gate line. A data driving circuit selectively supplies turn-on driving data voltage and turn-off data voltage to the data lines in sync with the scan control signal; a sensing circuit outputs (i) a first sensing value based upon an OLED threshold voltage of a sensing pixel, and (ii) a second sensing value based upon a kickback current. A sensing value correction circuit determines a final sensing value for the OLED threshold voltage based on the first sensing value and the second sensing value.

公开(公告)号：US20160071445A1

公开(公告)日：2016-03-10

申请号：US14584071

申请日：2014-12-29

Applicant: LG Display Co., Ltd.

Inventor： Changhee KIM ,  Kilhwan OH ,  Hunki SHIN

IPC: G09G3/00 ,  G09G3/32

CPC classification number: G09G3/006 ,  G09G3/3225 ,  G09G3/3233 ,  G09G3/3291 ,  G09G2300/0814 ,  G09G2300/0842 ,  G09G2310/0216 ,  G09G2310/027 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2320/045 ,  G09G2330/12

Abstract: A method for sensing degradation of an organic light emitting display includes an initialization step for applying a sensing data voltage to a gate node of a driving TFT and applying an initialization voltage to a source node of the driving TFT, a boosting step for floating the gate node and the source node of the driving TFT and applying a drain-to-source current of the driving TFT to an organic element, a sensing step for again applying the initialization voltage to the source node of the driving TFT, setting a gate-to-source voltage of the driving TFT depending on a degradation degree of the organic element, and storing the drain-to-source current of the driving TFT determined by the set gate-to-source voltage in a line capacitor, and a sampling step for outputting a voltage stored in the line capacitor as a sensing voltage.

Abstract translation: 用于感测有机发光显示器的劣化的方法包括：初始化步骤，用于将感测数据电压施加到驱动TFT的栅极节点，并将初始化电压施加到驱动TFT的源极节点;升压步骤，用于浮置栅极 节点和驱动TFT的源节点，并将驱动TFT的漏极 - 源极电流施加到有机元件;感测步骤，用于再次将初始化电压施加到驱动TFT的源极节点，将栅极设置为 驱动TFT的源电压取决于有机元件的劣化程度，并将由设置的栅极 - 源极电压确定的驱动TFT的漏 - 源电流存储在线电容器中，以及采样步骤 输出存储在线路电容器中的电压作为感测电压。

公开(公告)号：US20160012798A1

公开(公告)日：2016-01-14

申请号：US14584214

申请日：2014-12-29

Applicant: LG Display Co., Ltd.

Inventor： Hyemi OH ,  Hunki SHIN ,  Changhee KIM

IPC: G09G5/18 ,  G09G3/32

CPC classification number: G09G3/3291 ,  G09G3/325 ,  G09G3/3283 ,  G09G2300/0426 ,  G09G2300/0452 ,  G09G2300/0465 ,  G09G2300/0847 ,  G09G2310/027 ,  G09G2320/029 ,  G09G2320/045

Abstract: An organic light emitting display includes a display panel including a plurality of pixels, each of the plurality of pixels including an organic light emitting diode (OLED) and a driving thin film transistor (TFT) to control an emission amount of the OLED, the plurality of pixels connected to respective sensing lines; and at least one sensing unit connected to a corresponding one of the pixels through the respective sensing line, the at least one sensing unit configured to sense an amount of carriers accumulated in a parasitic capacitor of the OLED of the corresponding one of the pixels when a driving current flows in the OLED, the at least one sensing unit thereby sensing a degradation of the OLED.

Abstract translation: 有机发光显示器包括包括多个像素的显示面板，所述多个像素中的每一个包括有机发光二极管（OLED）和用于控制OLED的发射量的驱动薄膜晶体管（TFT），所述多个 的像素连接到相应的感测线; 以及至少一个感测单元，其通过相应的感测线连接到相应的一个像素，所述至少一个感测单元被配置为：当所述至少一个感测单元被配置成感测累积在所述像素中的相应一个像素的所述OLED的寄生电容器中的载流量 在OLED中驱动电流流动，所述至少一个感测单元从而感测OLED的劣化。

公开(公告)号：US20220208116A1

公开(公告)日：2022-06-30

申请号：US17559340

申请日：2021-12-22

Applicant: LG DISPLAY CO., LTD.

Inventor： Changhee KIM ,  Kimin SON

IPC: G09G3/3275

Abstract: A data driving circuit and a display device are provided. A display device includes: a display panel including a plurality of subpixels, each of the plurality of subpixels including: a light-emitting device, and a driving transistor configured to drive the light-emitting device, and a data driving circuit configured to: supply a data voltage to the plurality of subpixels, and supply, in a display period, to at least one subpixel among the plurality of subpixels: the data voltage, obtained by adding a first voltage corresponding to a luminance of the light-emitting device, and a second voltage smaller than a change value of a threshold voltage of the driving transistor.