公开(公告)号：US11892675B2

公开(公告)日：2024-02-06

申请号：US18169896

申请日：2023-02-16

Applicant: Japan Display Inc.

Inventor： Yuji Maede ,  Shinichi Komura ,  Hiroaki Kijima

IPC: F21V8/00

CPC classification number: G02B6/0061 ,  G02B6/0036 ,  G02B6/0068

Abstract: According to one embodiment, an illumination device comprises a light guide, a light source, a reflective layer, a first prism and a second prism, wherein the light guide has a thickness in a second direction increasing toward a second side surface, the first prism and the second prism have cross-sectional shapes being formed in a triangle shape, a first height of the first prism in the second direction is smaller than a second height of the second prism in the second direction.

公开(公告)号：US11726253B2

公开(公告)日：2023-08-15

申请号：US17657400

申请日：2022-03-31

Applicant: Japan Display Inc.

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

IPC: F21V8/00

CPC classification number: G02B6/0045 ,  G02B6/0036 ,  G02B6/0046 ,  G02B6/0055 ,  G02B6/0091 ,  G02B6/0048

Abstract: According to an embodiment, an illumination device includes a light guide having a first plane, a second plane opposed to the first plane and substantially parallel to the first plane, and a tilted plane opposed to the first plane and tilted to the first plane, the tilted plane and the second plane being arranged in a first direction, and a light emitting device including a first light emitting part, a second light emitting part, and a third light emitting part which are located directly below the tilted plane, arranged in the first direction, and configured to emit light having wavelengths different from each other.

公开(公告)号：US11054569B2

公开(公告)日：2021-07-06

申请号：US16984393

申请日：2020-08-04

Applicant: Japan Display Inc.

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

IPC: F21V8/00

Abstract: According to one embodiment, the illumination device includes a first area, a second area, a first light guide, a plurality of first light sources, a second light guide, a plurality of second light sources, a first layer and a second layer. The first layer extends from the first area over a boundary between the first area and the second area, to between a second side surface of the first light guide and the boundary. The second layer extends from the second area over the boundary to between a third side surface of the second light guide and the boundary.

公开(公告)号：US11953712B2

公开(公告)日：2024-04-09

申请号：US18314149

申请日：2023-05-09

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：US11860402B2

公开(公告)日：2024-01-02

申请号：US17858235

申请日：2022-07-06

Applicant: Japan Display Inc.

Inventor： Koji Fujisawa ,  Ken Kagabu ,  Hiroaki Kijima ,  Ken Onoda

IPC: G02B6/00 ,  F21V8/00

CPC classification number: G02B6/0076 ,  G02B6/0035 ,  G02B6/00 ,  G02B6/0016

Abstract: According to one embodiment, an illumination device, in which a plurality of light guides include a plurality of light guide pairs, each of the plurality of light guide pairs includes a first light guide and a second light guide, the plurality of light guide pairs are connected with their long sides opposed to each other, a plurality of laser light source elements include a plurality of first light source elements arranged to be opposed to a first side surface on a short side of the first light guide of the light guide pair, and a plurality of second light source elements arranged to be opposed to a second side surface of the second light guide of the light guide pair.

公开(公告)号：US11808963B2

公开(公告)日：2023-11-07

申请号：US17981558

申请日：2022-11-07

Applicant: Japan Display Inc.

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

IPC: F21V8/00

CPC classification number: G02B6/0036 ,  G02B6/0045 ,  G02B6/0068

Abstract: According to one embodiment, an illumination device includes a light guide including a first main surface, a second main surface, a first side surface, and a second side surface, a plurality of convex portions provided on the second main surface, and a first light source element and a second light source element opposing the first side surface and the second side surface, respectively, and when an incident angle of a main ray of the light propagating in the light guide is expressed by θ, a diffusion angle of the light is δ, an angle of the convex portion of the light guide is α, a critical angle of the light guide is θc, and an angle which satisfies (90°−θc) is β0, a relationship: ((β0+δ)/3)

公开(公告)号：US11796730B2

公开(公告)日：2023-10-24

申请号：US17663043

申请日：2022-05-12

Applicant: Japan Display Inc.

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

IPC: F21V8/00

CPC classification number: G02B6/0036 ,  G02B6/009 ,  G02B6/0031 ,  G02B6/0053 ,  G02B6/0076 ,  G02B6/0055

Abstract: According to one embodiment, an illumination device includes a first light guide including a first main surface, a second main surface, a first side surface and a second side surface, a first light source and a first layer including a first prism provided on the second side surface. The first prism protrudes from the second main surface toward the opposite side to the first main surface and has a cross-sectional shape of a triangle with a first slope and a second slope. The incident angle of light emitted from the first light source and entering the first light guide from the second side surface, the angle between the first slope and the first direction, and the angle between the first slope and the second slope are set to values that satisfy the predetermined conditions, respectively.

公开(公告)号：US11237319B2

公开(公告)日：2022-02-01

申请号：US17340651

申请日：2021-06-07

Applicant: Japan Display Inc.

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

IPC: F21V8/00

Abstract: According to one embodiment, the illumination device includes a first area, a second area, a first light guide, a plurality of first light sources, a second light guide, a plurality of second light sources, a first layer and a second layer. The first layer extends from the first area over a boundary between the first area and the second area, to between a second side surface of the first light guide and the boundary. The second layer extends from the second area over the boundary to between a third side surface of the second light guide and the boundary.