公开(公告)号：US20230222971A1

公开(公告)日：2023-07-13

申请号：US17999151

申请日：2021-05-17

Applicant: JOLED INC.

Inventor： Toshiyuki KATO

IPC: G09G3/3225

CPC classification number: G09G3/3225 ,  G09G2310/0286 ,  G09G2330/021

Abstract: A display apparatus includes a display panel including a plurality of pixels, and a current limiting circuit that limits current consumption in the plurality of pixels, the current limiting circuit includes a gain computation circuit that computes a screen power value in reference to a pixel value included in a video signal and that determines a gain in reference to the screen power value, and a gain multiplication circuit that multiplies the pixel value by the gain and that outputs a limit signal including the pixel value multiplied by the gain, the display panel includes a display unit, and a lighting control circuit that controls a lighting state of the plurality of pixels in reference to a predicted power value computed according to the limit signal, to reduce a power consumption value in the plurality of pixels to a value equal to or smaller than a control target power value, the gain is 1 when the screen power value is equal to or smaller than the control target power value, and the gain is a value equal to or smaller than a value obtained by dividing the control target power value by the screen power value, in other cases.

公开(公告)号：US20160247734A1

公开(公告)日：2016-08-25

申请号：US15027313

申请日：2014-05-07

Applicant: JOLED INC.

Inventor： Miki FUKUSHIMA ,  Kazushi SUGIYAMA ,  Toshiyuki KATO ,  Yasunori NEGORO

IPC: H01L21/66 ,  H01L23/544 ,  G09G3/00 ,  H01L27/32

CPC classification number: H01L22/24 ,  G09G3/006 ,  G09G3/3225 ,  H01L23/544 ,  H01L27/3244 ,  H01L2223/54426 ,  H01L2227/323 ,  H01L2924/0002 ,  H01L2924/00

Abstract: A method of manufacturing an organic EL display apparatus including an organic EL panel having light emitting pixels each of which has an organic EL element (OEL) includes: lighting up lighting target pixels set from among the light emitting pixels; causing an imaging device to photograph the organic EL panel and receiving a photographed image from the imaging device; detecting the lighting target pixels using the photographed image; determining whether an undetectable pixel that cannot be detected is included among the lighting target pixels, using a result obtained in the detecting; increasing an amount of luminescence of the undetectable pixel to a detectable amount of luminescence, when it is determined that the undetectable pixel is included; and aligning a relative position of the organic EL display apparatus and the imaging device, using the result obtained in the detecting.

Abstract translation: 一种制造有机EL显示装置的方法，所述有机EL显示装置包括具有各自具有有机EL元件（OEL）的发光像素的有机EL面板，包括：点亮从所述发光像素中设置的点亮目标像素; 使成像装置拍摄有机EL面板并从成像装置接收拍摄图像; 使用所拍摄的图像来检测照明目标像素; 使用在检测中获得的结果来确定在点亮目标像素中是否包括不可检测的不可检测的像素; 当确定包含不可检测的像素时，将不可检测像素的发光量增加到可检测量的发光; 以及使用检测中获得的结果对准有机EL显示装置和成像装置的相对位置。

公开(公告)号：US20210090499A1

公开(公告)日：2021-03-25

申请号：US17027090

申请日：2020-09-21

Applicant: JOLED INC.

Inventor： Toshiyuki KATO

IPC: G09G3/3233

Abstract: A current limiting circuit includes: a gain calculation circuit which calculates a screen power value based on pixel values and calculates a gain based on the screen power value; and a gain multiplication circuit which multiplies the pixel values by the gain, and when a maximum value of the pixel values exceeds a first threshold value, the gain calculation circuit calculates the screen power value by use of a common pixel value greater than or equal to the maximum value instead of the pixel values, and when the screen power value exceeds a control target power value, the gain calculation circuit sets the gain to a ratio of the control target power value with respect to the screen power value, and when the screen power value is less than or equal to the control target power value, the gain calculation circuit sets the gain to 1.

公开(公告)号：US20180048844A1

公开(公告)日：2018-02-15

申请号：US15658631

申请日：2017-07-25

Applicant: JOLED INC.

Inventor： Toshiyuki KATO

IPC: H04N5/57 ,  G06T7/00

CPC classification number: H04N5/57 ,  G06T7/97 ,  G06T2207/10016 ,  G06T2207/20021

Abstract: A video signal processing method includes: dividing a current frame which is to be processed into a plurality of blocks which are predetermined rectangular blocks; calculating, for each of the plurality of blocks divided into in the dividing, a feature quantity relating to luminance of pixels in the block; calculating first correction data, based on a feature quantity calculated from each of first blocks located above a first horizontal boundary in the current frame and a feature quantity calculated from each of one or more blocks located below a first horizontal boundary in a previous frame which has been processed immediately before the current frame; and correcting luminance of pixels in each of the first blocks in the current frame, based on the first correction data calculated in the calculating.

公开(公告)号：US20230169920A1

公开(公告)日：2023-06-01

申请号：US17987273

申请日：2022-11-15

Applicant: JOLED INC.

Inventor： Toshiyuki KATO

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2310/08 ,  G09G2330/02

Abstract: A current limiting circuit includes: a delay circuit that receives a video signal, and outputs a delay signal obtained by delaying the video signal by a time period corresponding to one frame; a calculation circuit that receives the video signal, and calculates a gain by which the delay signal is to be multiplied, based on power consumption of the pixels corresponding to the delay signal and power consumption of the pixels corresponding to the video signal; and a gain multiplication circuit that multiplies the delay signal by the gain.

公开(公告)号：US20170132987A1

公开(公告)日：2017-05-11

申请号：US15347863

申请日：2016-11-10

Applicant: JOLED INC. ,  JAPAN DISPLAY INC.

Inventor： Toshiyuki KATO

IPC: G09G5/00 ,  H04N5/04

CPC classification number: G09G5/006 ,  G09G5/12 ,  G09G2310/061 ,  G09G2310/08 ,  G09G2360/18 ,  G09G2370/04 ,  H04N5/04 ,  H04N21/242 ,  H04N21/4307 ,  H04N21/4436 ,  H04N21/8547

Abstract: The present disclosure provides a display device driving method and the like that can suppress degradation of display quality at the time of switching to a video based on a video signal from an external signal source. The display device driving method according to the present disclosure includes: receiving a training signal transmitted from an external signal source; after receiving the training signal, transmitting a lock signal to the external signal source at a timing based on an internal synchronization signal of the display device; after transmitting the lock signal, receiving a video signal that is transmitted from the external signal source and is synchronous with an external synchronization signal; and displaying a video by using the video signal received from the external signal source.

公开(公告)号：US20190035337A1

公开(公告)日：2019-01-31

申请号：US16009770

申请日：2018-06-15

Applicant: JOLED INC.

Inventor： Toshiyuki KATO

IPC: G09G3/3266 ,  G09G3/3275

Abstract: A display panel includes: a panel unit including a plurality of pixel circuits arranged in rows and columns; a source driving circuit that supplies, to the pixel circuits, a video image signal representing a video image displayed on the panel unit; a gate driving circuit that supplies, to the pixel circuits in a row-sequential manner, control signals each being a gate signal indicating a write timing of writing the video image signal; and a control terminal that receives a clear signal that serves as a refresh interruption signal. When the clear signal is received by the control terminal during the supply of the control signals, the gate driving circuit interrupts the supply of the control signals to the pixel circuits in a subsequent row.

公开(公告)号：US20160163264A1

公开(公告)日：2016-06-09

申请号：US14904741

申请日：2014-06-12

Applicant: JOLED INC.

Inventor： Masaru NISHIMURA ,  Toshiyuki KATO ,  Hirofumi NAKAGAWA

IPC: G09G3/32

CPC classification number: G09G3/3258 ,  G09G3/3266 ,  G09G2300/0871 ,  G09G2310/0286 ,  G09G2310/0291 ,  G09G2310/068 ,  G09G2320/0223 ,  G09G2320/0233 ,  G09G2320/041 ,  G09G2330/045 ,  G09G2330/08 ,  H05B33/08 ,  Y02B20/32

Abstract: An EL display apparatus includes: gate driver ICs (i. e., gate driver circuits); a plurality of pixels; gate signal lines each transmit a selection voltage for selecting a pixel from the pixels and non-selection voltage for placing a pixel in a non-selection state; and TCON. The pixels each include: a driving transistor; an EL element; a first switching transistor; and a second switching transistor. The gate driver ICs each include scanning and outputting buffer circuits which are connected to TCON to which an output signal of each of the scanning and outputting buffer circuits is inputted.

Abstract translation: EL显示装置包括：栅极驱动器IC（即栅极驱动电路）; 多个像素; 栅极信号线各自从像素发送用于选择像素的选择电压和用于将像素置于非选择状态的非选择电压; 和TCON。 各像素包括：驱动晶体管; EL元素; 第一开关晶体管; 和第二开关晶体管。 栅极驱动器IC各自包括扫描和输出缓冲器电路，其连接到TCON，每个扫描和输出缓冲器电路的输出信号被输入到TCON。

公开(公告)号：US20230130414A1

公开(公告)日：2023-04-27

申请号：US17966247

申请日：2022-10-14

Applicant: JOLED INC.

Inventor： Hiroaki ISHII ,  Toshiyuki KATO

IPC: G09G3/20 ,  G09G3/3233

Abstract: A control device is for use in a case where frame periods, each being a period in which one image continues to be displayed, vary in length within a given range or temporarily become stable in length on a frame-by-frame basis, and accurate lengths of the frame periods are not known beforehand. The control device changes a total number of subframe periods to reconfigure the frame period with n subframe periods, where n is an integer of two or more, regardless of the frame period input, and causes the display of the image. The control device includes a signal processor that outputs an output video signal according to a first input video signal on a subframe-period-by-subframe-period basis; and a controller that supplies the output video signal output from the signal processor and a control signal for controlling an operation of the display panel to the display panel.

公开(公告)号：US20230110329A1

公开(公告)日：2023-04-13

申请号：US17959756

申请日：2022-10-04

Applicant: JOLED INC.

Inventor： Hiroaki ISHII ,  Toshiyuki KATO

IPC: G09G3/34 ,  G09G3/3233

Abstract: A control device for a display panel for applications where a frame period in which a same image continues to be displayed varies from frame to frame within a certain range or the frame period is temporarily stable across frames and where a precise frame period is undetermined beforehand. The control device controls the display panel such that, when a frame having a length exceeding a preset number of lines is input, the display panel displays an image over a frame period corresponding to the preset number of lines and an added period added after the frame period. The added period includes one or more individual added periods each including a light emission period and a light extinction period, and the one or more individual added periods are each a period corresponding a predetermined number of lines.