公开(公告)号：US10453376B2

公开(公告)日：2019-10-22

申请号：US15442995

申请日：2017-02-27

Applicant: Japan Display Inc.

Inventor： Tadafumi Ozaki ,  Kazuhiko Sako ,  Tsutomu Harada ,  Naoyuki Takasaki

IPC: G09G3/20

Abstract: An image display device includes a first pixel data calculator calculating first pixel data for a pixel of attention based on a first error value for a pixel adjacent thereto in the same error diffusion block; a second pixel data calculator calculating second pixel data for the pixel of attention based on a corrected error value for the adjacent pixel; a first error value calculator calculating the first error value based on the first pixel data; a second error value calculator calculating a second error value based on the second pixel data; and a corrected error value calculator calculating the corrected error value by correcting the second error value in a direction in which the second error value approaches the first error value in accordance with whether the pixel of attention is located within a predetermined range from a border among a plurality of error diffusion blocks.

公开(公告)号：US10089938B2

公开(公告)日：2018-10-02

申请号：US15168890

申请日：2016-05-31

Applicant: Japan Display Inc.

Inventor： Naoyuki Takasaki ,  Tsutomu Harada ,  Kazuhiko Sako

IPC: G09G3/34 ,  G09G3/36

Abstract: According to an aspect, a display device includes an image display panel; a planar light source including a light guide plate, a first sidelight light source, and a second sidelight light source; and a control unit. The control unit sets first luminance determination blocks in a first display surface of the image display panel and identifies a first luminance determination block to be a target of luminance correction by referring to luminance information on the light sources. The control unit sets second luminance determination blocks in a second display surface of the image display panel and identifies a second luminance determination block to be a target of luminance correction by referring to the luminance information on the light sources. The control unit controls light source lighting amounts of the respective light sources to satisfy luminance of the identified first luminance determination block and the identified second luminance determination block.

公开(公告)号：US10026365B2

公开(公告)日：2018-07-17

申请号：US15041569

申请日：2016-02-11

Applicant: Japan Display Inc.

Inventor： Kazuhiko Sako ,  Tsutomu Harada ,  Naoyuki Takasaki

IPC: G09G3/20 ,  G09G3/34

Abstract: A display device includes an image display panel, a backlight with independently driven light sources for lighting the image display panel, a backlight control section which calculates, on the basis of required luminance for each divided area based on an image signal and luminance distribution information for the backlight, tentative lighting levels of the light sources, selects the light sources in calculation order, calculates estimated luminance of a selected light source on the basis of the calculated tentative lighting levels or the calculated lighting level of an already selected light source and the luminance distribution information, and calculates, if the estimated luminance does not satisfy the required luminance, a lighting level of the selected light source that satisfies the required luminance on the basis of the tentative lighting level thereof and the luminance distribution information, and a calculation order change section which changes the calculation order at determined timing.

公开(公告)号：US20180124364A1

公开(公告)日：2018-05-03

申请号：US15797880

申请日：2017-10-30

Applicant: Japan Display Inc.

Inventor： Tatsuya Yata ,  Naoyuki Takasaki

IPC: H04N9/31 ,  G02B27/01

CPC classification number: H04N9/3144 ,  G02B27/0101 ,  G02B27/283 ,  G02B2027/0118 ,  G02B2027/014 ,  G02B2027/0159 ,  G03B21/2073 ,  H04N9/312 ,  H04N9/3155 ,  H04N9/3167 ,  H04N9/3179

Abstract: According to one embodiment, a display device includes an optical modulation element configured to emit image light corresponding to an image by using illumination light from an illumination device, a polarization control element configured to emit first polarized light, and second polarized light on the basis of the image light receiving from the optical modulation element, a polarization separation element configured to transmit the first polarized light as transmitted light and reflect the second polarized light as reflected light, and a projector configured to project the transmitted light onto a first projection area of a projection plane, and projects reflected light onto a second projection area of the projection plane.

公开(公告)号：US20180061310A1

公开(公告)日：2018-03-01

申请号：US15672699

申请日：2017-08-09

Applicant: Japan Display Inc.

Inventor： Kazuhiko Sako ,  Kazunari Tomizawa ,  Tsutomu Harada ,  Naoyuki Takasaki ,  Tae Kurokawa

IPC: G09G3/22 ,  G09G3/34 ,  G09G3/20

CPC classification number: G09G3/22 ,  G09G3/2003 ,  G09G3/3406 ,  G09G3/3413 ,  G09G3/342 ,  G09G3/3607 ,  G09G2300/0426 ,  G09G2300/0452 ,  G09G2320/02 ,  G09G2320/0673 ,  G09G2330/021 ,  G09G2340/06 ,  G09G2360/16 ,  G09G2370/08

Abstract: A signal processor of a display device includes: a light emission value calculating unit that calculates a light emission value; a chunk determining unit that determines whether pixels within a predetermined luminance value range are continuously present and determines an area of the continuous pixels as a chunk; a maximum luminance value detecting unit that detects a maximum luminance value inside the chunk in one of the partial areas; a luminance gain value determining unit that determines a luminance gain value based on the maximum luminance value such that a corrected light emission value that is a value acquired by multiplying the light emission value by the luminance gain value is a value of an upper limit emission value or less; and a light emission control unit that causes the light source units to emit light based on the corrected light emission value.

公开(公告)号：US09897743B2

公开(公告)日：2018-02-20

申请号：US14837342

申请日：2015-08-27

Applicant: Japan Display Inc.

Inventor： Shigenori Aoki ,  Susumu Kimura ,  Tsutomu Harada ,  Naoyuki Takasaki

IPC: F21V8/00 ,  G02F1/1335

CPC classification number: G02B6/0061 ,  G02B6/0021 ,  G02B6/003 ,  G02B6/0038 ,  G02B6/0041 ,  G02B6/0046 ,  G02B6/0055 ,  G02B6/0065 ,  G02B6/0078 ,  G02F1/133615

Abstract: According to one embodiment, an illumination device includes a light source, clad, and a plurality of cores. The clad includes a first edge at a light source side, a second edge opposite to the first edge, and a plurality of grooves formed by a plurality of partitions extending in parallel to each other from the first edge to the second edge. The cores are accommodated in the grooves, and each core includes an incident surface on which light from the light source is incident and an exit surface exposed from the groove to emit the light incident on the incident surface.

公开(公告)号：US09830866B2

公开(公告)日：2017-11-28

申请号：US15403626

申请日：2017-01-11

Applicant: Japan Display Inc.

Inventor： Naoyuki Takasaki ,  Tsutomu Harada ,  Susumu Kimura ,  Fumitaka Gotoh

IPC: G09G3/34 ,  F21V8/00 ,  G09G3/36

CPC classification number: G09G3/342 ,  G02B6/0068 ,  G09G3/3406 ,  G09G3/3648 ,  G09G5/026 ,  G09G2300/0452 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2320/0666 ,  G09G2330/021 ,  G09G2360/145 ,  G09G2360/16 ,  G09G2380/10

Abstract: According to an aspect, a display device includes an image display panel; a planar light source including a light guide plate and an edge-lit light source that has light sources; and a controller. The controller sets luminance determination blocks by virtually dividing the image display panel in a light-source-arrangement-direction, identifies a luminance determination block with a highest luminance in the incidence direction, among luminance determination blocks at a same position in the light-source-arrangement-direction, identifies a luminance determination block the luminance of which is to be corrected by referring to luminance information of the light sources, and controls a light quantity of each of the light sources in such a manner that luminance of the identified luminance determination block is achieved.

公开(公告)号：US20170323600A1

公开(公告)日：2017-11-09

申请号：US15583146

申请日：2017-05-01

Applicant: Japan Display Inc.

Inventor： Kazuhiko Sako ,  Naoyuki Takasaki ,  Tsutomu Harada ,  Tatsuya Yata ,  Shigenori Aoki

IPC: G09G3/34

CPC classification number: G09G3/342 ,  G09G3/3426 ,  G09G3/3648 ,  G09G2320/0271 ,  G09G2320/0686 ,  G09G2360/147

Abstract: According to an aspect, a display apparatus includes: a plurality of light sources; a display device that includes a display area provided with n1 pixels and that is irradiated with light from the light sources; a light source controller controlling an operation of the light sources; and a display controller controlling an output gradation value of part or all of the pixels. The display area includes a plurality of partial areas, the partial areas corresponding to the light sources on a one-to-one basis. The light source controller determines the amount of light emitted from each light source corresponding to a corresponding one of the partial areas based on luminance of light required for the corresponding partial area. The display controller performs first correction and second correction when the amounts of light emitted from two light sources corresponding to two adjacent partial areas are different.

公开(公告)号：US20170162128A1

公开(公告)日：2017-06-08

申请号：US15367091

申请日：2016-12-01

Applicant: Japan Display Inc.

Inventor： Susumu Kimura ,  Kazuhiko Sako ,  Tadafumi Ozaki ,  Naoyuki Takasaki ,  Fumitaka Gotoh ,  Tsutomu Harada

IPC: G09G3/34 ,  H05B33/08 ,  F21V8/00

CPC classification number: G09G3/342 ,  G02B6/0068 ,  G09G2320/0626 ,  G09G2320/0646 ,  G09G2330/12 ,  G09G2360/16 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/089

Abstract: According to one embodiment, a light source device includes a plurality of light emitting elements including at least first and second light emitting elements, lightguide, first circuit, second circuit, and controller. The lightguide includes a first surface on which light from light emitting elements is incident and a second surface through which the light exits. The first circuit connects light emitting elements in series. The second circuit can bypass each of light emitting elements. The controller turns on light emitting elements using the first circuit if light emitting elements function normally, and if one of light emitting elements functions abnormally, the controller turns on the light emitting element functioning normally using the second circuit.

公开(公告)号：US09613571B2

公开(公告)日：2017-04-04

申请号：US14505084

申请日：2014-10-02

Applicant: Japan Display Inc.

Inventor： Fumitaka Gotoh ,  Tsutomu Harada ,  Naoyuki Takasaki

IPC: G09G3/34 ,  G09G3/36 ,  G09G5/04

CPC classification number: G09G3/3406 ,  G09G3/3648 ,  G09G5/04 ,  G09G2300/0452 ,  G09G2320/0242 ,  G09G2320/0646 ,  G09G2320/0666 ,  G09G2330/023 ,  G09G2380/10

Abstract: A display device includes: an image display unit in an image display region, the image display unit including a plurality of main pixels each including sub-pixels; a light source portion that irradiates the image display region; a signal correction unit that calculates saturation and value of the main pixels based on first color information to be displayed on a predetermined pixel, the first color information being obtained based on an input video signal, and generates second color information by correcting the first color information based on the calculated saturation and value; a signal generation unit that calculates the saturation and the value of the main pixels based on the second color information, and generates a signal for determining light source luminance of the light source based on the calculated saturation and value; and a light source control unit that controls luminance of the light source based on the signal.