公开(公告)号：US10373572B2

公开(公告)日：2019-08-06

申请号：US15016341

申请日：2016-02-05

Applicant: Japan Display Inc.

Inventor： Kazuhiko Sako ,  Naoyuki Takasaki ,  Tsutomu Harada

IPC: G09G3/36 ,  G09G3/34

Abstract: A display device includes an image display panel, a light source unit, and a signal processing unit. The tentative expansion coefficient calculating unit calculates a tentative expansion coefficient. The tentative index value calculating unit calculates a tentative index value serving as an index of the irradiation amount of light based on the tentative expansion coefficient. The low-saturation pixel detecting unit detects low-saturation pixels in a certain region on an image display surface. The light irradiation amount calculating unit calculates a comparative light irradiation amount based on a detection by the low-saturation pixel detecting unit, a display quality maintenance reference value at which the display quality of colors displayed by the low-saturation pixels is maintained, and an index value calculated based on the tentative index value and calculates, based on the comparative light irradiation amount, a light irradiation amount serving as the irradiation amount of light.

公开(公告)号：US10345508B2

公开(公告)日：2019-07-09

申请号：US15879985

申请日：2018-01-25

Applicant: Japan Display Inc.

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

IPC: F21V8/00 ,  G02F1/1335

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：US10324559B2

公开(公告)日：2019-06-18

申请号：US15243309

申请日：2016-08-22

Applicant: Japan Display Inc.

Inventor： Shinya Iuchi ,  Hayato Kurasawa ,  Masahiro Togashi ,  Tsutomu Harada ,  Yuji Suzuki

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/14

Abstract: A display device unit includes a plurality of image display panels in such a manner that display surfaces of the plurality of image display panels are orderly arranged on a flat surface, and is configured to display an image using the plurality of display surfaces as a single screen. The image display panel includes a drive electrode unit to which an application voltage is applied and a detection electrode unit at which a detection voltage is generated in accordance with the application voltage. The application voltage is applied solely to the drive electrode unit included in an application image display panel which is a part of the image display panels.

公开(公告)号：US10297231B2

公开(公告)日：2019-05-21

申请号：US15677326

申请日：2017-08-15

Applicant: Japan Display Inc.

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

IPC: G09G5/10 ,  G06T5/00 ,  G09G3/34 ,  G09G3/36 ,  G09G3/3208

Abstract: According to an aspect, a display apparatus includes: an image display panel including a plurality of pixels and displaying an image; and a signal processor generating a second signal by multiplying signal values for a plurality of sub-pixels making up each of the plurality of pixels by a gain, the signal values being included in a first signal that is an input signal of the image. The the signal processor calculates a luminance of each of the plurality of pixels based on the signal values of the sub-pixels included in the respective pixels. The signal processor increases the gain by which the signal values of the sub-pixels of the pixel having a luminance greater than a first luminance threshold are multiplied, in accordance with the luminance of the corresponding pixel.

公开(公告)号：US10297212B2

公开(公告)日：2019-05-21

申请号：US14667981

申请日：2015-03-25

Applicant: Japan Display Inc.

Inventor： Kazuhiko Sako ,  Tsutomu Harada

IPC: G09G3/34 ,  G09G3/36 ,  G09G5/00

Abstract: A display device includes an image display panel on which pixels are arranged, a backlight which lights the image display panel from a rear of the image display panel, a first device which controls the backlight, and a second device which controls the image display panel. The first device generates an image signal, outputs the image signal to the second device, determines a light source lighting amount of the backlight on the basis of the image signal by blocks obtained by dividing a display surface of the image display panel and luminance distribution information on the backlight stored in advance, and controls the backlight by the light source lighting amount. The second device acquires the image signal, converts the image signal to a display signal for controlling display of the image display panel, and controls the image display panel.

公开(公告)号：US20190130854A1

公开(公告)日：2019-05-02

申请号：US16232120

申请日：2018-12-26

Applicant: Japan Display Inc.

Inventor： Masaya TAMAKI ,  Tsutomu Harada ,  Hirotaka Hayashi

IPC: G09G3/36

Abstract: According to one embodiment, a display device, includes a first main pixel including first to third sub-pixels, a second main pixel including fourth to sixth sub-pixels, a display driver which produces video signals to be written to the respective sub-pixels of the first and second main pixels and supplies the video signals to the respective sub-pixels via signal lines, any one of the first to third sub-pixels and any one of the fourth to sixth sub-pixels sharing one of the signal lines.

公开(公告)号：US10139675B2

公开(公告)日：2018-11-27

申请号：US15595696

申请日：2017-05-15

Applicant: Japan Display Inc.

Inventor： Tsutomu Harada ,  Kazuhiko Sako ,  Tae Kurokawa

IPC: G02F1/1335 ,  G09G3/20 ,  G09G3/34 ,  G09G3/36

Abstract: According to an aspect, a display apparatus includes: an image display panel that displays an image thereon; a planar light source that includes a plurality of light sources and irradiates a plurality of divided areas of the image display panel with light from the back side of the image display panel; and a signal processor that drives the light sources individually based on input signals of the image to control brightness of the individual divided areas. The signal processor performs image display on the image display panel using output signals obtained by lowering brightness of a dark region in the image represented by the input signals.

公开(公告)号：US10032418B2

公开(公告)日：2018-07-24

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: G06F3/038 ,  G09G3/34

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：US20170337885A1

公开(公告)日：2017-11-23

申请号：US15598552

申请日：2017-05-18

Applicant: Japan Display Inc.

Inventor： Shigenori Aoki ,  Tatsuya Yata ,  Tsutomu Harada

IPC: G09G3/34 ,  G02F1/1335 ,  G09G3/36

CPC classification number: G09G3/3426 ,  G02F1/133603 ,  G02F1/133605 ,  G02F1/133606 ,  G02F1/133611 ,  G02F2201/08 ,  G09G3/3611 ,  G09G2300/0452 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0646

Abstract: According to one embodiment, a display device includes a display panel including a first sub display area and a second sub display area, and an illumination device, wherein the illumination device includes a first light source opposed to the first sub display area, a second light source opposed to the second sub display area, and a partition positioned between the first and second light sources and the display panel, and the partition includes a first side surface surrounding the first light source, a second side surface surrounding the second light source, and a connector which connects the first side surface and the second side surface, and the connector is formed of curved surfaces, or two or more flat surfaces, or a combination of curved surfaces and flat surfaces.

公开(公告)号：US20170316746A1

公开(公告)日：2017-11-02

申请号：US15496447

申请日：2017-04-25

Applicant: Japan Display Inc.

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

IPC: G09G3/34 ,  G02B27/01

CPC classification number: G09G3/3426 ,  G02B27/0101 ,  G02B2027/0118 ,  G09G2320/0646 ,  G09G2360/16

Abstract: According to an aspect, a display apparatus includes: a plurality of light sources; a display device irradiated with light from the light sources; and a controller. The display area includes a plurality of partial areas corresponding to the light sources on a one-to-one basis. Each of the partial areas includes a first area and a second area, the first area being irradiated with light from a first light source that corresponds thereto, and the second area being irradiated with light from the first light source and a second light source adjacent to the first light source. The controller controls an operation of the first light source based on whether the first area requires the light from the first light source and whether the second area obtains light required for display output by receiving the light from the second light source.