公开(公告)号：US11693171B2

公开(公告)日：2023-07-04

申请号：US17970578

申请日：2022-10-21

Applicant: Japan Display Inc.

Inventor： Ken Onoda ,  Shinichi Komura ,  Koichi Okuda ,  Hiroaki Kijima

IPC: F21V8/00

CPC classification number: G02B6/0038 ,  G02B6/0068 ,  G02B6/0076

Abstract: According to one embodiment, a display device includes a display panel, a first light guide, and a second light guide. In the first light guide, a first main surface includes a first plane and first grooves between the first plane and a first side surface, a second main surface includes second grooves orthogonal to the first grooves, and a second plane between the second grooves and the first side surface. In the second light guide, a third main surface includes a third plane and third grooves located between the third plane and a fourth side surface, a fourth main surface includes fourth grooves orthogonal to the third grooves, and a fourth plane located between the fourth grooves and the fourth side surface.

公开(公告)号：US10551550B2

公开(公告)日：2020-02-04

申请号：US15700606

申请日：2017-09-11

Applicant: Japan Display Inc.

Inventor： Toshihiko Fukuma ,  Shinichi Komura ,  Youichi Asakawa ,  Ken Onoda

IPC: F21V8/00

Abstract: In one embodiment, an illumination device includes a light guide, a light source and prisms. The light guide has a side surface and first and second main surfaces. The light source emits light to the side surface in a first emission direction. The prisms are provided on the second main surface. The second main surface has first and second areas. The prisms include first prisms in the first area and second prisms in the second area. A first virtual line connecting apexes of the first prisms is inclined with respect to the first main surface. A distance between the second area and the first main surface is greater than a distance between the first area and the first main surface.

公开(公告)号：US10073207B2

公开(公告)日：2018-09-11

申请号：US15371380

申请日：2016-12-07

Applicant: Japan Display Inc.

Inventor： Youichi Asakawa ,  Toshihiko Fukuma ,  Ken Onoda ,  Shinichi Komura

IPC: G02F1/1335 ,  F21V8/00 ,  G02F1/1333 ,  G02F1/13363 ,  G02F1/1343

CPC classification number: G02B6/0025 ,  G02B6/003 ,  G02B6/0036 ,  G02B6/0041 ,  G02B6/0043 ,  G02B6/0068 ,  G02F1/133308 ,  G02F1/133345 ,  G02F1/133502 ,  G02F1/133504 ,  G02F1/133512 ,  G02F1/133514 ,  G02F1/133528 ,  G02F1/133553 ,  G02F1/133615 ,  G02F1/133617 ,  G02F1/13362 ,  G02F1/13363 ,  G02F1/134309 ,  G02F2001/133314 ,  G02F2001/13332 ,  G02F2001/133519 ,  G02F2001/133562 ,  G02F2001/133567 ,  G02F2001/133618 ,  G02F2001/133638 ,  G02F2001/134345 ,  G02F2201/121 ,  G02F2201/123 ,  G02F2202/28 ,  G02F2202/36 ,  G02F2203/01 ,  G02F2203/055 ,  G02F2203/09

Abstract: In one embodiment, a display device includes first and second substrates, a liquid crystal layer, a polarizing element, a light source, and a bending member. The first substrate includes first and second surfaces and a side surface. The second substrate includes third and fourth surfaces. The polarizing element is provided on the fourth surface side of the second substrate. The light source irradiates the side surface with polarized parallel light. The bending member bends a path of the light entering the first substrate from the light source such that the light goes to the second substrate. No polarizing element is provided between the first substrate and the light source, and the bending member is provided on the second surface side of the first substrate.

公开(公告)号：US12032247B2

公开(公告)日：2024-07-09

申请号：US17664076

申请日：2022-05-19

Applicant: Japan Display Inc.

Inventor： Shinichi Komura ,  Koichi Okuda ,  Ken Onoda ,  Hiroaki Kijima

IPC: G02F1/1343 ,  F21V8/00 ,  G02F1/13357

CPC classification number: G02F1/134345 ,  G02B6/0055 ,  G02B6/0068 ,  G02F1/133621 ,  G02F2201/52

Abstract: According to one embodiment, a liquid crystal display device includes a display panel including a red sub-pixel, a green sub-pixel and a blue sub-pixel and an illumination device including a red light-emitting element, a green light-emitting element and a blue light emitting element and irradiating a mixture of light emitted by the light emitting elements onto the display panel. Further, of the red sub-pixel, the green sub-pixel and the blue sub-pixel, an aperture area of a sub-pixel having a lowest wall plug efficiency of the light emitting element of a respective color is greater than aperture areas of the sub-pixels of other colors.

公开(公告)号：US11194090B2

公开(公告)日：2021-12-07

申请号：US17009959

申请日：2020-09-02

Applicant: Japan Display Inc.

Inventor： Youichi Asakawa ,  Ken Onoda ,  Hiroaki Kijima ,  Shinichi Komura

IPC: F21V8/00 ,  G02F1/1335 ,  G02F1/13357 ,  H01S5/40

Abstract: According to one embodiment, a display device displays a color gamut defined by connecting a first defined color in first chromaticity coordinates, a second defined color in second chromaticity coordinates, and a third defined color in third chromaticity coordinates. An illumination device of the display device includes green, blue and red lasers. The green and blue lasers emit light of the second and third defined colors, and red laser emits light of a color in fourth chromaticity coordinates. Each of the pixels displays a color including the first defined color by mixing light in the fourth chromaticity coordinates and the second defined color.

公开(公告)号：US10437104B2

公开(公告)日：2019-10-08

申请号：US15730076

申请日：2017-10-11

Applicant: Japan Display Inc.

Inventor： Ken Onoda ,  Shinichi Komura ,  Youichi Asakawa ,  Toshihiko Fukuma

IPC: G02F1/1335 ,  F21V8/00 ,  G02F1/01

Abstract: According to one embodiment, an illumination device includes a first member, a second member, a first light source. The first member includes a first prism array including first prisms aligned in a first direction. The second member includes a second prism array including second prisms aligned in a second direction. The second member disposed more closely to a first A side than to the first member. The first light source disposed more closely to a second A side than to the second member to apply a parallel light beam to a second B side. The parallel light beam from the first light source is made incident on the second prism array and incident on the first prism array without passing through a light guide.

公开(公告)号：US10324335B2

公开(公告)日：2019-06-18

申请号：US15442185

申请日：2017-02-24

Applicant: Japan Display Inc.

Inventor： Youichi Asakawa ,  Toshihiko Fukuma ,  Ken Onoda ,  Shinichi Komura

IPC: G02F1/1335 ,  G02F1/13363

Abstract: According to one embodiment, a display device includes a display panel including a first substrate, a second substrate, and an optical element layer provided between the substrates, a light directing unit facing the first substrate of the display panel, and including a first main surface disposed on a side facing the first substrate, and a second main surface disposed on a side reverse to the first main surface, and a light source unit disposed on the first substrate side with respect to the display panel, and emitting polarized light toward the first or second main surface. The polarized light is made incident on the first or second main surface, and directed perpendicularly to the optical element layer.

公开(公告)号：US10209426B2

公开(公告)日：2019-02-19

申请号：US15459275

申请日：2017-03-15

Applicant: Japan Display Inc.

Inventor： Toshihiko Fukuma ,  Shinichi Komura ,  Youichi Asakawa ,  Ken Onoda

IPC: F21V8/00

Abstract: According to one embodiment, a backlight unit includes a light source, a first lens, a second lens, and a light guide unit. The light source emits light which is diffused as the light travels in a first-A direction, the light being diffused in a second direction intersecting the first-A direction, and a third direction intersecting the first-A direction and the second direction. The first lens and the second lens are arranged in an optical path of the light. The first and second lenses control the light such that the first lens controls a beam width of the light in the second direction, and the second lens controls a beam width of the light in the third direction, thereby converting the light into parallel light.

公开(公告)号：US20170269278A1

公开(公告)日：2017-09-21

申请号：US15459275

申请日：2017-03-15

Applicant: Japan Display Inc.

Inventor： Toshihiko FUKUMA ,  Shinichi Komura ,  Youichi Asakawa ,  Ken Onoda

IPC: F21V8/00

CPC classification number: G02B6/003 ,  G02B6/0065

Abstract: According to one embodiment, a backlight unit includes a light source, a first lens, a second lens, and a light guide unit. The light source emits light which is diffused as the light travels in a first-A direction, the light being diffused in a second direction intersecting the first-A direction, and a third direction intersecting the first-A direction and the second direction. The first lens and the second lens are arranged in an optical path of the light. The first and second lenses control the light such that the first lens controls a beam width of the light in the second direction, and the second lens controls a beam width of the light in the third direction, thereby converting the light into parallel light.

公开(公告)号：US20170139111A1

公开(公告)日：2017-05-18

申请号：US15349542

申请日：2016-11-11

Applicant: Japan Display Inc.

Inventor： Shinichi KOMURA ,  Toshihiko Fukuma ,  Youichi Asakawa ,  Ken Onoda

IPC: F21V8/00 ,  G02F1/1335

CPC classification number: G02B6/0056 ,  G02B6/005 ,  G02B6/0051 ,  G02B6/0055 ,  G02F1/133615 ,  G02F1/133617 ,  G02F1/13362 ,  G02F2001/133614 ,  G02F2201/123 ,  G02F2202/36

Abstract: According to one embodiment, a display device includes a light source unit, a light guide unit, a lens, and a light emitting layer. The light source unit emits light to the light guide unit. The lens concentrates the light emitted from the light source unit. The light guide unit guides the light concentrated by the lens toward the light emitting layer. The light guided by the light guide unit is transmitted to the light emission layer without any intervening prism layer.