公开(公告)号：US20170287397A1

公开(公告)日：2017-10-05

申请号：US15507394

申请日：2015-08-27

Applicant: JOLED INC.

Inventor： Kazuki SAWA ,  Hiroshi HAYASHI ,  Tomoyuki MAEDA

IPC: G09G3/3233 ,  G09G3/20

CPC classification number: G09G3/3233 ,  G09G3/2007 ,  G09G5/363 ,  G09G2300/043 ,  G09G2320/0233 ,  G09G2360/16

Abstract: A display device correction method performed by a control unit that performs display control on an organic electroluminescent (EL) panel including a plurality of display pixels, in an organic EL display which includes the organic EL panel and the control unit. The display device correction method includes: obtaining a cumulative value of a pixel signal supplied to a drive transistor which is included in a current pixel to be processed among the plurality of display pixels and supplies drive current according to the pixel signal to an organic EL element (OEL); calculating a shift amount of a threshold voltage of the drive transistor, using the cumulative value; calculating an amount of change in mobility, using the shift amount; and calculating a correction parameter for correcting a pixel signal, using the amount of change in mobility.

公开(公告)号：US20170076668A1

公开(公告)日：2017-03-16

申请号：US15310979

申请日：2015-05-12

Applicant: JOLED INC.

Inventor： Masafumi MATSUI ,  Eiji IWAUCHI ,  Tomoyuki MAEDA

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/043 ,  G09G2360/16

Abstract: A display device includes: a display unit which includes a plurality of pixels each including an organic EL element; and a control unit which adjust a value of a luminance signal to be supplied to a target pixel to be corrected, such that an actual luminance of the target pixel is equal to a reference luminance, the reference luminance being an actual luminance of a reference pixel obtained when the luminance signal to be supplied to the target pixel is supplied to the reference pixel. The reference pixel has predetermined attenuation characteristics for light emission amount.

Abstract translation: 显示装置包括：显示单元，其包括多个像素，每个像素包括有机EL元件; 以及控制单元，其将要提供给要校正的目标像素的亮度信号的值调整为使得所述目标像素的实际亮度等于参考亮度，所述参考亮度是参考像素的实际亮度 当将要提供给目标像素的亮度信号提供给参考像素时获得。 参考像素具有用于发光量的预定衰减特性。

公开(公告)号：US20160232842A1

公开(公告)日：2016-08-11

申请号：US14909851

申请日：2014-10-15

Applicant: JOLED INC.

Inventor： Yuki IMAI ,  Tomoyuki MAEDA ,  Mika NAKAMURA

IPC: G09G3/3233 ,  G09G3/3258

CPC classification number: G09G3/3233 ,  G09G3/3258 ,  G09G3/3291 ,  G09G2320/0223 ,  G09G2320/0626 ,  G09G2330/021 ,  G09G2360/16

Abstract: A display device includes light-emitting pixels, a voltage source, power supply lines for supplying drive voltage from the voltage source to each light-emitting pixel, a voltage drop amount estimating unit which estimates an amount of voltage drop between the voltage source and each light-emitting pixel, using video data indicating light emission luminance of each light-emitting pixel, a first storage unit which holds correction information indicating light emission characteristics obtained when a driving transistor in the light-emitting pixel operates both in linear and saturated regions, a second storage unit which holds reference characteristic information indicating light emission characteristics obtained when the driving transistor operates in the saturated region, and a luminance signal correcting unit which generates the luminance signal by correcting a reference level of the luminance signal associated with the light emission luminance, based on the estimated amount of voltage drop and the correction information.

Abstract translation: 显示装置包括发光像素，电压源，用于从电压源向每个发光像素提供驱动电压的电源线;压降量估计单元，其估计电压源和每个发光像素之间的电压降的量 发光像素，使用表示各发光像素的发光亮度的视频数据;第一存储单元，其保持指示发光像素中的驱动晶体管在线性区域和饱和区域中动作时获得的发光特性的校正信息; 第二存储单元，其保持指示在饱和区域中驱动晶体管工作时获得的发光特性的参考特性信息;以及亮度信号校正单元，其通过校正与发光亮度相关联的亮度信号的参考电平来生成亮度信号 ，基于估计的电压量 下降和校正信息。

公开(公告)号：US20170270855A1

公开(公告)日：2017-09-21

申请号：US15504848

申请日：2015-08-10

Applicant: JOLED INC.

Inventor： Tomoyuki MAEDA

IPC: G09G3/3233 ,  G09G3/3266

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G2300/0861 ,  G09G2310/0251 ,  G09G2310/0262 ,  G09G2320/0233 ,  G09G2320/029 ,  G09G2320/043 ,  G09G2320/045 ,  G09G2320/0693 ,  G09G2330/12 ,  G09G2360/16 ,  H01L51/0031 ,  H01L51/50

Abstract: A display device includes: a display unit including display pixels each of which includes: an organic EL element that emits light in response to a drive current; and a drive transistor that supplies a drive current corresponding to a magnitude of a luminance signal to the organic EL element; a measurement pixel located outside the display unit including: a measurement element composed of an organic EL element; and a measurement transistor that supplies a drive current to the measurement element; a current measurement unit that measures a current of the measurement pixel in a predetermined degradation state; a deviation calculation unit that calculates a deviation between a theoretical first correction amount of the luminance signal and a second correction amount of the luminance signal calculated from the measured current; and a luminance signal correction unit that corrects a theoretical third correction amount of the luminance signal of the display pixel.

公开(公告)号：US20170278461A1

公开(公告)日：2017-09-28

申请号：US15504866

申请日：2015-08-10

Applicant: JOLED INC.

Inventor： Tomoyuki MAEDA ,  Masafumi MATSUI

IPC: G09G3/3291

CPC classification number: G09G3/3291 ,  G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2300/0871 ,  G09G2310/0245 ,  G09G2310/0251 ,  G09G2310/0289 ,  G09G2310/0294 ,  G09G2310/08 ,  G09G2320/043 ,  H01L27/3244

Abstract: There is provided a drive method for a display device in which a plurality of pixel circuits are disposed in rows and columns, each of the plurality of pixel circuits including a light emitter that emits light in an amount according to a magnitude of a current supplied, and a drive transistor that supplies a current according to a magnitude of a video signal to the light emitter. The drive method includes applying an initialization voltage across a gate and a source of the drive transistor by an initialization voltage adjustment unit in an initialization period for initializing the drive transistor, the initialization voltage being higher than a threshold voltage of the drive transistor and according to a state of deterioration of the drive transistor.

公开(公告)号：US20170206841A1

公开(公告)日：2017-07-20

申请号：US15407605

申请日：2017-01-17

Applicant: JOLED INC. ,  JAPAN DISPLAY INC.

Inventor： Tomoyuki MAEDA

IPC: G09G3/3266 ,  G09G3/20 ,  G09G3/3291

CPC classification number: G09G3/3266 ,  G09G3/2018 ,  G09G3/3233 ,  G09G3/3291 ,  G09G2300/043 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/0251 ,  G09G2310/08

Abstract: A display device includes: a plurality of pixels each of which includes an electroluminescent (EL) element and a drive transistor which controls a current flowing through the EL element; a gate driver circuit which applies, to each of the plurality of pixels, a compensation voltage for compensating a threshold voltage of the drive transistor, in each of compensation voltage application periods included in a period other than a period in which a video signal voltage is applied; and a control circuit which controls the gate driver circuit, wherein the control circuit adjusts a length of, among the compensation voltage application periods, a preceding compensation voltage application period immediately before the video signal voltage is applied.