公开(公告)号：US10663645B2

公开(公告)日：2020-05-26

申请号：US16142837

申请日：2018-09-26

Applicant: Japan Display Inc.

Inventor： Toji Aoshima ,  Shiori Akamatsu ,  Takashi Ota ,  Tomohisa Onishi

IPC: F21V7/04 ,  F21V8/00

Abstract: According to one embodiment, an illumination device includes a light guide, a frame surrounding the light guide, a light emitting unit located between the light guide and the frame, and a wiring substrate electrically connected to the light emitting unit. The wiring substrate includes a convex portion projecting in a first direction as seen in plan view. The frame includes a concave portion facing the convex portion as seen in plan view. The concave portion is spaced apart from the convex portion.

公开(公告)号：US20180120645A1

公开(公告)日：2018-05-03

申请号：US15854069

申请日：2017-12-26

Applicant: Japan Display Inc.

Inventor： Yasuhisa SHIRAISHI ,  Tomohisa Onishi

IPC: G02F1/1335 ,  F21V8/00

Abstract: This invention reduces or prevents a phenomenon where a screen close to a light source becomes yellowed. A liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight includes a light guide plate 10 and white LEDs 21 arrayed in a first direction on a plane of incidence 11 of the light guide plate 10. The white LEDs 21 each includes, in the first direction on a light-emitting surface, a central area occupied by a blue spectrum more densely than at adjacent sides of the central area. Incident plane protrusions 111, each extending in a thickness direction of the light guide plate 10, are formed on a section corresponding to the area having the dense blue spectrum of each LED 21, at the plane of incidence 11 of the light guide plate 10.

公开(公告)号：US11460629B2

公开(公告)日：2022-10-04

申请号：US17478345

申请日：2021-09-17

Applicant: Japan Display Inc.

Inventor： Toji Aoshima ,  Shiori Akamatsu ,  Takashi Ota ,  Tomohisa Onishi

IPC: F21V8/00

Abstract: An illumination device is provided and includes a light guide; a light emitter facing the light guide; a wiring substrate provided on the light emitter and electrically connected to the light emitter; and a frame surrounding the light guide and the light emitter, wherein the wiring substrate has a first edge and a second edge which extend in a first direction, and a third edge which connects the first edge and the second edge, the frame has a fourth edge facing the third edge, the third edge and the fourth edge are spaced apart from each other and form a trench which communicates with an outside of the illumination device, and the trench has a curved portion in plan view.

公开(公告)号：US11125933B2

公开(公告)日：2021-09-21

申请号：US16876360

申请日：2020-05-18

Applicant: Japan Display Inc.

Inventor： Toji Aoshima ,  Shiori Akamatsu ,  Takashi Ota ,  Tomohisa Onishi

IPC: F21V8/00

Abstract: An illumination device is provided and includes a light guide; a light emitting unit facing the light guide; a wiring substrate provided on the light emitting unit; and a frame surrounding the light guide and the light emitting unit, wherein the wiring substrate has a first edge and a second edge which extend in the first direction, and a third edge which connects the first edge and the second edge, the frame has a fourth edge facing the third edge; the third edge and the fourth edge are spaced apart from each other and form a trench which communicates with an outside of the illumination device, and a length of the third edge and a length of the fourth edge along the trench are larger than a distance between the first edge and the second edge in a second direction intersecting the first direction.

公开(公告)号：US10578922B2

公开(公告)日：2020-03-03

申请号：US15854069

申请日：2017-12-26

Applicant: Japan Display Inc.

Inventor： Yasuhisa Shiraishi ,  Tomohisa Onishi

IPC: G02F1/1335 ,  F21V8/00

Abstract: This invention reduces or prevents a phenomenon where a screen close to a light source becomes yellowed. A liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight includes a light guide plate 10 and white LEDs 21 arrayed in a first direction on a plane of incidence 11 of the light guide plate 10. The white LEDs 21 each includes, in the first direction on a light-emitting surface, a central area occupied by a blue spectrum more densely than at adjacent sides of the central area. Incident plane protrusions 111, each extending in a thickness direction of the light guide plate 10, are formed on a section corresponding to the area having the dense blue spectrum of each LED 21, at the plane of incidence 11 of the light guide plate 10.

公开(公告)号：US09885913B2

公开(公告)日：2018-02-06

申请号：US14920632

申请日：2015-10-22

Applicant: Japan Display Inc.

Inventor： Yasuhisa Shiraishi ,  Tomohisa Onishi

IPC: G02F1/1335 ,  F21V8/00

CPC classification number: G02F1/133615 ,  G02B6/0016 ,  G02B6/0038 ,  G02B6/0068 ,  G02B6/0073 ,  G02F1/133606

Abstract: This invention reduces or prevents a phenomenon where a screen close to a light source becomes yellowed. A liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight includes a light guide plate 10 and white LEDs 21 arrayed in a first direction on a plane of incidence 11 of the light guide plate 10. The white LEDs 21 each includes, in the first direction on a light-emitting surface, a central area occupied by a blue spectrum more densely than at adjacent sides of the central area. Incident plane protrusions 111, each extending in a thickness direction of the light guide plate 10, are formed on a section corresponding to the area having the dense blue spectrum of each LED 21, at the plane of incidence 11 of the light guide plate 10.