公开(公告)号：US20230235863A1

公开(公告)日：2023-07-27

申请号：US18099354

申请日：2023-01-20

Applicant: Japan Display Inc.

Inventor： Takashi OTA ,  Nobuyuki SUZUKI ,  Makoto HASEGAWA ,  Masafumi OKADA

IPC: F21K9/68 ,  F21K9/69 ,  F21V5/04 ,  F21V7/00

CPC classification number: F21K9/68 ,  F21K9/69 ,  F21V5/04 ,  F21V7/0066 ,  F21Y2115/10

Abstract: A lighting device including a first unit and a second unit, the first unit including: a first funnel shaped reflector having a first neck, a first opening, a first reflecting surface and a first light axis, a first LED emitting a first color disposed on the first neck, a first liquid crystal lens disposed at the first opening, a second unit including: a second funnel shaped reflector having a second neck, a second opening, a second reflecting surface and a second light axis, a second LED emitting a second color disposed on the second neck, a second liquid crystal lens disposed at the second opening; a length h1 of the first funnel shaped reflector is same as a length of the second funnel shaped reflector, and a diameter d1 of the first opening is same as a diameter of the second opening, and h1/d1 is two or more.

公开(公告)号：US20230086503A1

公开(公告)日：2023-03-23

申请号：US17943368

申请日：2022-09-13

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Masafumi OKADA

IPC: F21V7/00 ,  F21S8/04

Abstract: The purpose of the present invention is to realize a lighting device which can be switched between an overall lighting and a local lighting with a single lighting device. The concrete structure is a lighting device including: a first light guide having a first major surface and a first back surface, and a first hole; a second light guide, disposed on the first light guide, and having a second major surface, a second back surface, and a second hole; a reflection sheet disposed under the first back surface of the first light guide; a liquid crystal lens disposed above the second major surface of the second light guide, in which first LEDs and second LEDs are disposed circumferentially along a side wall of the first hole and a side wall of the second hole, respectively, and the first LEDs and the second LEDs are displaced each other in azimuth direction.

公开(公告)号：US20230056516A1

公开(公告)日：2023-02-23

申请号：US17979788

申请日：2022-11-03

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：US20230018610A1

公开(公告)日：2023-01-19

申请号：US17954331

申请日：2022-09-28

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Masafumi OKADA

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

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：US20230003363A1

公开(公告)日：2023-01-05

申请号：US17939408

申请日：2022-09-07

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Ken KAGABU

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

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：US20220260217A1

公开(公告)日：2022-08-18

申请号：US17569525

申请日：2022-01-06

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Takeo KOITO ,  Nobuyuki SUZUKI ,  Masafumi OKADA

IPC: F21K9/233 ,  F21K9/61 ,  F21V8/00

Abstract: The purpose of the present invention is to realize a lighting device of small light distribution angle and less leakage light and further to realize a lighting device in which the light beam is easy to control. The following is an example of the structure to meet the above purpose. A lighting device including: a light guide; LEDs set at a side surface of the light guide; a prism sheet set on a major surface of the light guide, in which a first louver which extends in a first direction and, a second louver which extends in an orthogonal direction to the first direction are superposed on the prism sheet.

公开(公告)号：US20250020311A1

公开(公告)日：2025-01-16

申请号：US18765444

申请日：2024-07-08

Applicant: Japan Display Inc.

Inventor： Masafumi OKADA ,  Nobuyuki SUZUKI ,  Makoto HASEGAWA

IPC: F21V7/00 ,  G02B27/30

Abstract: A lighting device includes a light source capable of emitting light and a collimator lens. The collimator lens has a recess facing the light source. The recess includes an interior surface. The interior surface includes a bottom surface smaller than an opening. The interior surface includes an inner side surface tapering toward the bottom surface. The inner side surface is generated by rotating a straight line around an optical axis of the light. The straight line is inclined at an angle of at least 10 degrees and at most 20 degrees with respect to the optical axis. The light enters the bottom surface at a light distribution angle of only three degrees or less with respect to the optical axis, and enters the inner side surface at a light distribution angle of more than three degrees with respect to the optical axis.

公开(公告)号：US20240337787A1

公开(公告)日：2024-10-10

申请号：US18732671

申请日：2024-06-04

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Masafumi OKADA

IPC: F21V8/00

CPC classification number: G02B6/0076 ,  G02B6/0036 ,  G02B6/0091

Abstract: According to one embodiment, in an illumination device, a plurality of first projection portions and a plurality of second projection portions are provided in a second area of a first light guide, a thickness of the first light guide becomes less as a location thereof which is further away from a first side surface and closer to a first central portion, a plurality of third projection portions and a plurality of fourth projection portions are provided in a third area of a second light guide, and the third area has a constant thickness and a fourth area of the second light guide is a recess portion.

公开(公告)号：US20240117954A1

公开(公告)日：2024-04-11

申请号：US18378807

申请日：2023-10-11

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Nobuyuki SUZUKI ,  Takeo KOITO

IPC: F21V14/00 ,  F21V7/00 ,  F21V7/06 ,  G02F1/1335 ,  G02F1/1343 ,  G02F1/1347 ,  G02F1/29

CPC classification number: F21V14/003 ,  F21V7/0016 ,  F21V7/06 ,  G02F1/133528 ,  G02F1/134309 ,  G02F1/1347 ,  G02F1/294

Abstract: A lighting device, comprises: a first reflector that includes a first hole where a light source is disposed, a second hole that emits light, and a reflection curved surface that connects the first hole and the second hole to each other, and the first reflector emits light to a first direction; a liquid crystal lens disposed to cover the second hole of the first reflector; and a polygonal pyramid including a bottom surface and a plurality of inclined surfaces, and being disposed so that the plurality of inclined surfaces oppose the liquid crystal lens. The plurality of inclined surfaces are reflection surfaces, and on the reflection surfaces, a traveling path of the light traveling to the first direction changes to a second direction. The liquid crystal lens can configure lenses corresponding to the plurality of inclined surfaces.

公开(公告)号：US20240110687A1

公开(公告)日：2024-04-04

申请号：US18473363

申请日：2023-09-25

Applicant: Japan Display Inc.

Inventor： Makoto HASEGAWA ,  Masafumi OKADA

IPC: F21V3/04 ,  F21V7/04 ,  F21V7/16

CPC classification number: F21V3/04 ,  F21V7/04 ,  F21V7/16 ,  F21W2131/30

Abstract: Provided is an illumination apparatus capable of forming ring-shaped irradiation light by using a simple configuration. Also provided is an illumination apparatus capable of freely changing a shape of the ring-shaped irradiation light. In order to achieve these objects, the present invention has the following means. That is, the illumination apparatus includes a first reflector having a first hole where a light source is arranged, a second hole that emits light, and a reflecting curved surface that connects the first hole and the second hole with each other, a light shield arranged at an area including a center of the second hole as seen in plan view, an opening portion formed in a ring-shaped manner between an inner edge of the second hole and an outer edge of the light shield, and a liquid crystal lens arranged so as to cover the opening portion.