公开(公告)号：US09728137B2

公开(公告)日：2017-08-08

申请号：US14812214

申请日：2015-07-29

Applicant: Japan Display Inc.

Inventor： Takayuki Imai ,  Norio Nakamura

IPC: G09G3/30 ,  G09G3/3283 ,  G09G5/18

CPC classification number: G09G3/3233 ,  G09G3/3283 ,  G09G5/18 ,  G09G2310/08 ,  G09G2320/0646 ,  G09G2330/021 ,  G09G2330/023

Abstract: According to one embodiment, a display device includes a display panel in which pixel units are arranged, and a controller configured to generate image signals by multiplying display data externally supplied to each line by a luminosity adjustment factor, to supply the generated image signals to the pixel units, to accumulate power consumption of each line, and to execute black insertion if the accumulated power consumption is determined to be greater than power consumption of one previous display frame by a predetermined value, wherein the luminosity adjustment factor is acquired by substituting the power consumption of one previous frame to a decreasing function, and a display pattern including a plurality of continuing black display lines is synchronized with supply of the image signals and is displayed moving the same direction of a screen scanning direction of the display panel during the black insertion.

公开(公告)号：US10706778B2

公开(公告)日：2020-07-07

申请号：US16420775

申请日：2019-05-23

Applicant: Japan Display Inc.

Inventor： Masahiro Kubota ,  Norio Nakamura

IPC: G09G3/3233 ,  G09G3/20 ,  G09G3/325 ,  G09G3/3266

Abstract: According to one embodiment, a display apparatus having a display device including a plurality of pixels, each of the pixels including: a drive transistor; and a light emitting element coupled to the drive transistor and to a reference potential, wherein a current from the drive transistor to the light emitting element is determined based on a voltage between a gate and a source of the drive transistor, and the display device is configured to divide a one-frame period during which a frame image is being displayed into certain unit time segments each having a same time period and each including one or more light emission time slots during each of which the pixel is emitting light and one or more no-light emission time slots during each of which the pixel is not emitting light, and then configured to switch light emission of the pixel on and off in a manner such that a light quantity in the one or more light emission time slots per each of the unit time segment is equalized.

公开(公告)号：US20190237015A1

公开(公告)日：2019-08-01

申请号：US16376095

申请日：2019-04-05

Applicant: JAPAN DISPLAY INC.

Inventor： Takayuki IMAI ,  Norio Nakamura

IPC: G09G3/3233 ,  G09G3/3283

CPC classification number: G09G3/3233 ,  G09G3/3283 ,  G09G5/18 ,  G09G2310/08 ,  G09G2320/0646 ,  G09G2330/021 ,  G09G2330/023

Abstract: According to one embodiment, a display device includes a display panel in which pixel units are arranged, and a controller configured to generate image signals by multiplying display data externally supplied to each line by a luminosity adjustment factor, to supply the generated image signals to the pixel units, to accumulate power consumption of each line, and to execute black insertion if the accumulated power consumption is determined to be greater than power consumption of one previous display frame by a predetermined value, wherein the luminosity adjustment factor is acquired by substituting the power consumption of one previous frame to a decreasing function, and a display pattern including a plurality of continuing black display lines is synchronized with supply of the image signals and is displayed moving the same direction of a screen scanning direction of the display panel during the black insertion.

公开(公告)号：US10417965B2

公开(公告)日：2019-09-17

申请号：US15725777

申请日：2017-10-05

Applicant: Japan Display Inc.

Inventor： Norio Nakamura

IPC: G09G3/3258 ,  G09G3/3233

Abstract: An organic EL display device includes a transistor for controlling whether to shut off supply of a current to an organic EL element or not, a pulse signal generation circuit which generates a pulse signal to be inputted to the transistor and a storage unit. The storage unit stores the information in such a way that one frame period includes, in order, a first light emission period which is a period preceding a pulse, a black display period which is a period equivalent to a width of the pulse, and a second light emission period which is longer than the first light emission period, and that an area expressed by a product of a length of and a luminance in a light emission period is greater for the second light emission period than for the first light emission period.

公开(公告)号：US10354593B2

公开(公告)日：2019-07-16

申请号：US15800600

申请日：2017-11-01

Applicant: Japan Display Inc.

Inventor： Yuta Murakami ,  Masahiro Kubota ,  Norio Nakamura

IPC: G09G3/3258 ,  G09G3/3233 ,  H01L27/32

Abstract: A display apparatus includes: a display device including pixels each including a light emitting element; a voltage generator configured to generate a plurality of different voltages; a switching device configured to be capable of switching the voltages in a manner such that any one of the voltages is applied to each of the pixels; and a controller configured to control operation of the switching device. The controller is configured to cause, at least once during a period for displaying an image corresponding to one frame, the switching device to operate in a manner such that voltages applied to the pixel are switched from a lower to a higher voltage.

公开(公告)号：US10304382B2

公开(公告)日：2019-05-28

申请号：US15635333

申请日：2017-06-28

Applicant: Japan Display Inc.

Inventor： Takayuki Imai ,  Norio Nakamura

IPC: G09G3/3233 ,  G09G3/3283 ,  G09G5/18

Abstract: According to one embodiment, a display device includes a display panel in which pixel units are arranged, and a controller configured to generate image signals by multiplying display data externally supplied to each line by a luminosity adjustment factor, to supply the generated image signals to the pixel units, to accumulate power consumption of each line, and to execute black insertion if the accumulated power consumption is determined to be greater than power consumption of one previous display frame by a predetermined value, wherein the luminosity adjustment factor is acquired by substituting the power consumption of one previous frame to a decreasing function, and a display pattern including a plurality of continuing black display lines is synchronized with supply of the image signals and is displayed moving the same direction of a screen scanning direction of the display panel during the black insertion.

公开(公告)号：US09460652B2

公开(公告)日：2016-10-04

申请号：US14546372

申请日：2014-11-18

Applicant: Japan Display Inc.

Inventor： Takayuki Imai ,  Norio Nakamura

IPC: G09G3/3208 ,  G09G3/32

CPC classification number: G09G3/3208 ,  G09G2320/0242 ,  G09G2320/0276 ,  G09G2320/046 ,  G09G2320/0666 ,  G09G2320/0673 ,  G09G2330/021

Abstract: According to one embodiment, a display device displays an n−1th frame (n is an integer which is greater than or equal 2) and an nth frame in this order. The display device includes a display panel, calculator, adjuster, and controller. The calculator calculates power consumption of the n−1th frame. The adjuster determines whether or not the nth frame is brighter than the n−1th frame, and adjusts brightness of the nth frame based on a brightness adjustment magnification of the nth frame calculated based on the power consumption of the n−1th frame and a decreasing function, when the nth frame is not brighter than the n−1th frame. The controller stops light emission with an arbitrary timing when the nth frame is displayed, when the nth frame is brighter than the n−1th frame.

Abstract translation: 根据一个实施例，显示装置依次显示n-1帧（n是大于或等于2的整数）和第n帧。 显示装置包括显示面板，计算器，调节器和控制器。 计算器计算第n帧的功耗。 调整器确定第n帧是否比第n-1帧更亮，并且基于基于第n-1帧的功耗计算的第n帧的亮度调整倍数和减小第n帧的亮度来调整第n帧的亮度 功能，当第n帧不比第n帧更亮时。 当第n帧比第n-1帧亮时，控制器在第n帧显示时以任意定时停止发光。

公开(公告)号：US09406257B2

公开(公告)日：2016-08-02

申请号：US14484314

申请日：2014-09-12

Applicant: Japan Display Inc.

Inventor： Norio Nakamura

IPC: G09G3/32

CPC classification number: G09G3/3233 ,  G09G3/2007 ,  G09G3/3266 ,  G09G2300/0452 ,  G09G2300/0809 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0254 ,  G09G2320/043 ,  G09G2320/066

Abstract: In a display device, a signal line drive circuit applies an initialization voltage to control terminals of drive transistors from corresponding video signal lines, and applies a reset potential to first terminals of the drive transistors from corresponding reset lines to initialize the drive transistor, and the initialization voltage is set to a lower value as a voltage value of the gradation voltage signal written after offset cancellation for offset-canceling a threshold value of the drive transistor is higher.

Abstract translation: 在显示装置中，信号线驱动电路向对应的视频信号线的驱动晶体管的控制端施加初始化电压，并将复位电位从相应的复位线施加到驱动晶体管的第一端，初始化驱动晶体管， 初始化电压被设定为较低值，因为在偏移消除之后写入的灰度电压信号的电压值用于偏移消除，驱动晶体管的阈值较高。

公开(公告)号：US11170712B2

公开(公告)日：2021-11-09

申请号：US16376095

申请日：2019-04-05

Applicant: JAPAN DISPLAY INC.

Inventor： Takayuki Imai ,  Norio Nakamura

IPC: G09G3/3233 ,  G09G3/3283 ,  G09G5/18

Abstract: According to one embodiment, a display device includes a display panel in which pixel units are arranged, and a controller configured to generate image signals by multiplying display data externally supplied to each line by a luminosity adjustment factor, to supply the generated image signals to the pixel units, to accumulate power consumption of each line, and to execute black insertion if the accumulated power consumption is determined to be greater than power consumption of one previous display frame by a predetermined value, wherein the luminosity adjustment factor is acquired by substituting the power consumption of one previous frame to a decreasing function, and a display pattern including a plurality of continuing black display lines is synchronized with supply of the image signals and is displayed moving the same direction of a screen scanning direction of the display panel during the black insertion.

公开(公告)号：US10304383B2

公开(公告)日：2019-05-28

申请号：US15724383

申请日：2017-10-04

Applicant: Japan Display Inc.

Inventor： Masahiro Kubota ,  Norio Nakamura

IPC: G09G5/10 ,  G09G3/3233 ,  G09G3/20 ,  G09G3/3266 ,  G09G3/325

Abstract: A display apparatus includes: a display device including a plurality of pixels each including a light emitting element; and a controller configured to control light emission timing of each of the pixels. The controller is configured to divide a time period during which a frame image is being displayed into certain unit time segments, and then switch light emission of the pixel on and off in a manner such that a light quantity per each of the unit time segment is equalized.