公开(公告)号：US20230314869A1

公开(公告)日：2023-10-05

申请号：US18331963

申请日：2023-06-09

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Masafumi OKADA

IPC: G02F1/13357 ,  F21S2/00 ,  G02F1/1337 ,  G02F1/1343

CPC classification number: G02F1/1336 ,  F21S2/00 ,  G02F1/1337 ,  G02F1/134309 ,  F21Y2115/10

Abstract: The purpose of the present invention is to realize a lighting device of thin, low power consumption and high emitting efficiency. A concrete structure of the inventions is as follows. A lighting device including a first light guide and a second light guide stacked on the first light guide, a reflecting sheet disposed under the first light guide, and a prism sheet disposed on the first light guide, in which a concentric first prism array is formed on the prism sheet, a plurality of first LEDs are disposed along a circumferential direction of a side wall of a first hole of the first light guide, a plurality of second LEDs are disposed along a circumferential direction of a side wall of a second hole of the second light guide, and the plurality of the first LEDs and the plurality of the second LEDs are displaced in azimuth direction.

公开(公告)号：US20230027661A1

公开(公告)日：2023-01-26

申请号：US17863456

申请日：2022-07-13

Applicant: Japan Display Inc.

Inventor： Masafumi OKADA ,  Nobuyuki SUZUKI ,  Makoto HASEGAWA

IPC: F21V7/04 ,  G03B21/20

Abstract: The purpose is to realize a lighting device which can project a light spot of rectangle with a simple structure. The invention is: A lighting device having a light source unit 1, the light source unit 1 including a funnel shaped reflector 10 and an LED 20, in which the funnel shaped reflector 10 includes a neck and an opening, the LED 20 is disposed at the neck of the funnel shaped reflector 10, a plan view of the opening is a rectangle, and provided a distance from the neck to the opening along axis is d, and one side of the rectangle is x, either one of the first light source unit and the second light source unit satisfies, d / x is 2 or larger.

公开(公告)号：US20230015472A1

公开(公告)日：2023-01-19

申请号：US17954371

申请日：2022-09-28

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI

IPC: F21V8/00 ,  G02F1/29

Abstract: A lighting device including: a light guide, a reflecting sheet and a first prism sheet, in which a first white LED, a second white LED and a third white LED are disposed in a same interval on a first side surface and on a second side surface, which opposes to the first side surface, a first prism array extending in a first direction and arranged in a second direction is formed on the major surface, a second prism array extending in a second direction and arranged in a first direction is formed on the back surface, the reflecting sheet is disposed under the back surface of the light guide, the first prism sheet is disposed on the major surface of the light guide, and a third prism array, extending in the second direction and arranged in the first direction is formed on the back surface of the first prism sheet.

公开(公告)号：US20220299697A1

公开(公告)日：2022-09-22

申请号：US17696965

申请日：2022-03-17

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Masafumi OKADA

IPC: F21V8/00

Abstract: A lighting device including: a light guide having a first side surface extending in a first direction and a second side surface opposing to the first side surface and extending in the first direction, a first LED being disposed at the first side surface, a second LED being disposed at the second side surface; in which a first area extends in the first direction and a second area extends in the second direction in the light guide; a prism sheet is disposed on the light guide; a prism extending in the first direction and arranged in the second direction is formed on the prism sheet; a first surface of the prism has a first angle with normal direction of the second prism sheet; a second surface of the prism has a second angle with normal direction of the second prism sheet; the first angle is larger than the second angle.

公开(公告)号：US20210325024A1

公开(公告)日：2021-10-21

申请号：US17226144

申请日：2021-04-09

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Ken KAGABU

IPC: F21V14/00 ,  F21V7/06 ,  G02F1/1337 ,  G02F1/1343 ,  F21V29/76 ,  F21V31/04 ,  G02F1/137 ,  F21V7/00

Abstract: The purpose of the present invention is to realize a lighting device of thin, low power consumption and small light distribution angle. The present invention takes the following structure to realize the above task: A lighting device having an emitting surface and a bottom opposing to the emitting surface including: a resin, set between the emitting surface and the bottom, having a hole at a center, a reflection block set in the hole at a side of the emitting surface, an LED, which is a light source, set in the hole at a side of the bottom, a space between the LED and the reflection block, in which the resin is contained in a container whose inner surface is a reflecting surface.

公开(公告)号：US20210311245A1

公开(公告)日：2021-10-07

申请号：US17219881

申请日：2021-04-01

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Michihide SHIBATA

IPC: F21V8/00 ,  G02F1/1335

Abstract: According to one embodiment, an electronic equipment includes a liquid crystal panel, an illumination device, and a light receiving element. The illumination device includes a first light guide which includes a first opening, a first light source, a second light guide including a first area, a second area, a first main surface, a second main surface, a first side surface, a second side surface, and a continuous surface, a second light source opposed to each of the continuous surface and the second side surface, and a light reflective layer covering each of the continuous surface and the first side surface.

公开(公告)号：US20210263375A1

公开(公告)日：2021-08-26

申请号：US17314437

申请日：2021-05-07

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Hiroyuki SHIMOKAWA

IPC: G02F1/1335 ,  G02F1/1333 ,  G02F1/13357

Abstract: According to one embodiment, an electronic equipment includes a liquid crystal panel, and an illumination device illuminating the liquid crystal panel. The illumination device includes a first light guide including a first opening composed of a notch or a through hole and opposed to the liquid crystal panel, a first light source opposed to the first light guide, a second light guide provided in the first opening and opposed to the liquid crystal panel, and a second light source opposed to the second light guide.

公开(公告)号：US20240255691A1

公开(公告)日：2024-08-01

申请号：US18631044

申请日：2024-04-10

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Masafumi OKADA

IPC: F21V8/00

CPC classification number: G02B6/0076 ,  G02B6/0025 ,  G02B6/0053 ,  G02B6/0068

Abstract: According to one embodiment, in an illumination device, a second light guide includes a plurality of fourth projecting portions provided in a first area of a fifth main surface opposing a prism sheet, a plurality of fifth projecting portions provided in a second area of a fifth main surface, and a plurality of sixth projecting portions on a sixth main surface opposing the fifth main surface, cross-sectional shapes of the fourth projecting portions and the fifth projecting portions are scalene triangles, and the fourth projecting portions and the fifth projecting portions are arranged in respective positions line-symmetrical position with respect to each other in plan view.

公开(公告)号：US20230375775A1

公开(公告)日：2023-11-23

申请号：US18366773

申请日：2023-08-08

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Masafumi OKADA

IPC: F21V8/00

CPC classification number: G02B6/0073 ,  G02B6/0053 ,  G02B6/0036 ,  G02B6/0075

Abstract: A lighting device capable of changing light direction includes: a light guide plate having a first side surface extending in a first direction; and LEDs at the first side surface, in which the light guide plate has a first area extending in a second direction which is a direction perpendicular to the first direction and a second area extending in the second direction and adjacent to the first area, corresponding to the first area, at least one LED is arranged at the first side surface, corresponding to the second area, at least one LED is arranged at the first side surface, a first prism array is formed under a bottom surface of the first area, and a second prism array is formed under a bottom surface of the second area, and a prism height of the second prism array is taller than a prism height of the first prism array.

公开(公告)号：US20230280013A1

公开(公告)日：2023-09-07

申请号：US18116878

申请日：2023-03-03

Applicant: Japan Display Inc.

Inventor： Masafumi OKADA ,  Nobuyuki SUZUKI ,  Makoto HASEGAWA

IPC: F21V5/00 ,  F21V7/06 ,  F21V9/08 ,  G02F1/29

CPC classification number: F21V5/008 ,  F21V7/06 ,  F21V9/08 ,  G02F1/29

Abstract: The purpose is to realize a lighting device of thin, small light distribution angle, and less leak light. Further, the purpose is to realize a lighting device which can control light beam accurately with liquid crystal lenses. The structure of the invention is as follows. A lighting device including: a reflector cylinder including a mirror thereinside; and a liquid crystal lens assembly that is disposed at a light emitting surface of the reflector cylinder and includes a plurality of liquid crystal lenses being stacked, in which the liquid crystal lens assembly includes a light shading film which defines a light emitting area of the liquid crystal lens assembly and which is formed in parallel with the light emitting surface of the reflector cylinder.