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公开(公告)号：US20240004238A1
公开(公告)日：2024-01-04
申请号：US18342841
申请日：2023-06-28
Applicant: Japan Display Inc.
Inventor： Masafumi OKADA , Shinichi KOMURA , Ken ONODA
IPC: G02F1/13357 , G02F1/1335
CPC classification number: G02F1/133621 , G02F1/133609 , G02F1/133613 , G02F1/133603
Abstract: According to one embodiment, an illumination device includes red light emitting elements, green light emitting elements and blue light emitting elements opposing a first side surface of a first light guide, and the red light emitting elements, the green light emitting elements and the blue light emitting elements are disposed along the first side surface in a third direction that intersects the first direction and the second direction, and, arranged to be symmetrical with respect to a central axis of the third direction of the first side surface.
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公开(公告)号：US20230417396A1
公开(公告)日：2023-12-28
申请号：US18338431
申请日：2023-06-21
Applicant: Japan Display Inc.
Inventor： Makoto HASEGAWA , Nobuyuki SUZUKI , Masafumi OKADA
CPC classification number: F21V13/04 , F21V14/003 , F21V7/05 , F21V7/09 , F21Y2115/10
Abstract: A lighting device according to the invention includes: a funnel shaped reflector including a first hole in which a light source is disposed, a second hole which emits light, and a reflecting curved surface connecting the first hole with the second hole, a first direction being defined as a direction of a line connecting a center of the first hole with a center of the second hole; a reflection plate, being opposed to the second hole of the funnel shaped reflector, major surface being tilted with a first angle; and a liquid crystal lens including an incident surface and opposing to the reflection plate, a major surface of the incident surface being tilted to the major surface of the reflection plate with a second angle, in which light emitted from the funnel shaped reflector is reflected at the reflection plate, and is emitted from the liquid crystal lens.
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公开(公告)号：US20230076604A1
公开(公告)日：2023-03-09
申请号：US17897331
申请日：2022-08-29
Applicant: Japan Display Inc.
Inventor： Masafumi OKADA , Nobuyuki SUZUKI
Abstract: The purpose is to provide a rectangle light spot with a simple structure. The invention is: A lighting device having a funnel shaped reflector which includes a neck portion and an opening portion, in which an LED as a light source is disposed at the neck, the opening portion of the funnel shaped reflector is a circle in a plan view, provided a distance from the neck portion to the opening portion along an optical axis is h, and a diameter of the circle is d, h/d is two or larger, and a liquid crystal lens is disposed at the opening.
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公开(公告)号：US20220003916A1
公开(公告)日：2022-01-06
申请号：US17305345
申请日：2021-07-06
Applicant: Japan Display Inc.
Inventor： Makoto HASEGAWA , Nobuyuki SUZUKI , Masafumi OKADA
IPC: F21V8/00
Abstract: According to one embodiment, a light emitting device includes a light guide plate, a prism sheet, and a lenticular lens, wherein, a plurality of first protrusions of the light guide plate are arranged along a first direction and extend along a second direction intersecting the first direction, a plurality of second protrusions of the light guide plate extend along the first direction and are arranged along the second direction, the prism sheet includes a plurality of third protrusions extending along the first direction and arranged in the second direction, and the lenticular lens includes a plurality of fourth protrusions arranged along the first direction and extending along the second direction.
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公开(公告)号：US20210318575A1
公开(公告)日：2021-10-14
申请号：US17218613
申请日：2021-03-31
Applicant: Japan Display Inc.
Inventor： Makoto HASEGAWA , Nobuyuki SUZUKI , Masafumi OKADA
IPC: G02F1/1335 , G02F1/137 , G02F1/03
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 comprising: a disc shaped light guide, having a main surface and a rear surface, including a first hole at a center, a disc shaped reflection sheet, disposed at the rear surface side of the light guide, including a second hole at a center, a prism sheet, disposed at the main surface side of the light guide, including a concentric first prism array, wherein a reflection mirror is set in the first hole of the light guide at the side near to the prism sheet, an LED is set opposing to the reflection mirror.-
Patent Agency Ranking
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
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.
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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.
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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
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.
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公开(公告)号：US20230258304A1
公开(公告)日：2023-08-17
申请号：US18136881
申请日：2023-04-20
Applicant: Japan Display Inc.
Inventor： Makoto HASEGAWA , Takeo KOITO , Nobuyuki SUZUKI , Masafumi OKADA
CPC classification number: F21K9/233 , F21K9/61 , G02B6/0053 , G02B6/003 , F21V11/06 , F21V14/003 , F21V5/005 , F21Y2115/10
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.
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公开(公告)号：US20230087920A1
公开(公告)日：2023-03-23
申请号：US18070820
申请日：2022-11-29
Applicant: Japan Display Inc.
Inventor： Makoto HASEGAWA , Nobuyuki SUZUKI , Masafumi OKADA
IPC: G02F1/1335 , G02F1/03 , G02F1/137
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 comprising:
a disc shaped light guide, having a main surface and a rear surface, including a first hole at a center,
a disc shaped reflection sheet, disposed at the rear surface side of the light guide, including a second hole at a center,
a prism sheet, disposed at the main surface side of the light guide, including a concentric first prism array,
wherein a reflection mirror is set in the first hole of the light guide at the side near to the prism sheet,
an LED is set opposing to the reflection mirror.
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