公开(公告)号：US20240045133A1

公开(公告)日：2024-02-08

申请号：US18490401

申请日：2023-10-19

Applicant: Japan Display Inc.

Inventor： Koji FUJISAWA ,  Ken KAGABU ,  Hiroaki KIJIMA ,  Ken ONODA

IPC: F21V8/00

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

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：US20230125438A1

公开(公告)日：2023-04-27

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

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：US20220382111A1

公开(公告)日：2022-12-01

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 ,  G02F1/13357 ,  F21V8/00

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：US20240418925A1

公开(公告)日：2024-12-19

申请号：US18679541

申请日：2024-05-31

Applicant: Japan Display Inc.

Inventor： Takashi OTA ,  Nobuyuki SUZUKI ,  Shinichi KOMURA ,  Hiroaki KIJIMA ,  Koichi OKUDA

IPC: F21V8/00 ,  G02F1/13357

Abstract: A backlight includes: a light guide plate including a front surface and a back surface, the light guide plate including an end face that connects one edge of the front surface and one edge of the back surface, at least part of the end face being inclined at an angle other than a right angle relative to the front surface; and a light source that emits light, the light source being set in an arrangement enabling emission of the light parallel to the front surface towards the at least part of the end face of the light guide plate, wherein the light is incident on and refracted at the at least part of the end face, propagates inside a material of the light guide plate, is reflected off the back surface, and is surface-emitted from the front surface.

公开(公告)号：US20230144819A1

公开(公告)日：2023-05-11

申请号：US17981558

申请日：2022-11-07

Applicant: Japan Display Inc.

Inventor： Shinichi KOMURA ,  Koichi OKUDA ,  Ken ONODA ,  Hiroaki KIJIMA

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：US20230114307A1

公开(公告)日：2023-04-13

申请号：US17962548

申请日：2022-10-10

Applicant: Japan Display Inc.

Inventor： Shinichi KOMURA ,  Koichi OKUDA ,  Ken ONODA ,  Hiroaki KIJIMA

IPC: H01S5/40

Abstract: According to one embodiment, an illumination device includes a light guide including an upper surface, a lower surface and a light entering surface, a first light emitting portion, a second light emitting portion, and a third light emitting portion. A first surface, a second surface, a third surface and a fourth surface of the upper surface are arranged in this order in a first direction. A width of the first surface is less than a width of the second surface, and the width of the second surface is less than a width of the third surface. An angle between the light entering surface and the first surface is an acute angle. The first light emitting portion, the second light emitting portion and the third light emitting portion face the light entering surface.

公开(公告)号：US20220365271A1

公开(公告)日：2022-11-17

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

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：US20230375776A1

公开(公告)日：2023-11-23

申请号：US18364564

申请日：2023-08-03

Applicant: Japan Display Inc.

Inventor： Hiroaki KIJIMA ,  Shinichi KOMURA ,  Ken ONODA ,  Koichi OKUDA

IPC: F21V8/00

CPC classification number: G02B6/0078 ,  G02B6/0068 ,  G02B6/0088 ,  G02B6/0036 ,  F21V2200/20

Abstract: According to one embodiment, an illumination device includes first and second light guides, first and second light sources, and first and second layers. The first light guide includes first and second main surfaces and first and second side surfaces. The second light guide includes third and fourth main surfaces and third and fourth side surfaces. The first light sources face a second side surface. The second light sources face the third side surface. The first layer includes first prisms in the second main surface. The second layer includes second prisms in the fourth main surface. The second and fourth side surfaces are displaced from each other in a first direction.

公开(公告)号：US20230280520A1

公开(公告)日：2023-09-07

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 ,  G02B6/0076 ,  G02B6/0068

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：US20230010210A1

公开(公告)日：2023-01-12

申请号：US17858235

申请日：2022-07-06

Applicant: Japan Display Inc.

Inventor： Koji FUJISAWA ,  Ken KAGABU ,  Hiroaki KIJIMA ,  Ken ONODA

IPC: F21V8/00

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.