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公开(公告)号：US20250008075A1
公开(公告)日：2025-01-02
申请号：US18884087
申请日：2024-09-12
Inventor： ATSUSHI FUKUI , YOSUKE ARAKI , WAHEI AGEMIZU , TAKASHI MATSUDA , KAZUMASA TAKATA
IPC: H04N13/322 , H04N13/398
Abstract: A display device according to a present exemplary embodiment includes: a varifocal lens having a variable focal length; a display disposed facing the varifocal lens; and a controller configured to control the focal length of the varifocal lens, and to cause the display to display an image. The controller is configured to shorten the focal length of the varifocal lens when a distant image is to be displayed on display, and to extend the focal length f of varifocal lens when a nearby image is to be displayed on the display.
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公开(公告)号：US20190369318A1
公开(公告)日：2019-12-05
申请号：US16267433
申请日：2019-02-05
Inventor： KAZUMASA TAKATA , WAHEI AGEMIZU
IPC: F21V8/00
Abstract: A display device includes light guide plate, a light source, and a concealing plate. The light guide plate propagates light incident from an incident end surface, reflects the light with a prism provided on a reflection surface, and causes the light to emit from an emission surface facing the reflection surface. The light guide plate has a plurality of inclined surfaces on a side end surface excluding an incident end surface of the light guide plate and a facing end surface facing the incident end surface, and a line segment connecting a center of sides of the plurality of inclined surfaces and a center of the light source, and the sides of the inclined surfaces are substantially perpendicular.
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公开(公告)号：US20240045206A1
公开(公告)日：2024-02-08
申请号：US18488821
申请日：2023-10-17
Inventor： WAHEI AGEMIZU , KAZUMASA TAKATA , MASARU FUJITA
IPC: G02B27/01
CPC classification number: G02B27/0101 , G02B2027/0118
Abstract: An optical system includes a light guide member, a prism, and a plurality of light control bodies. The light guide member includes an incident surface on which light is incident, and a first surface and a second surface facing each other. In the light guide member, the second surface is an emission surface of light. The prism is provided on the first surface and reflects light passing through the light guide member toward the second surface. The plurality of light control bodies are positioned between light sources and the incident surface. The plurality of light control bodies control light rays output from the light sources and incident on the incident surface. Each of the plurality of light control bodies includes an incident lens. Each of the plurality of light control bodies causes the light incident on the incident lens from the light source to be incident on the incident surface.
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公开(公告)号：US20210356752A1
公开(公告)日：2021-11-18
申请号：US17235088
申请日：2021-04-20
Inventor： KAZUMASA TAKATA , MASARU FUJITA , WAHEI AGEMIZU , YOSUKE ARAKI , TOMOHISA SAKAGUCHI
Abstract: An optical system includes a light guide member and a plurality of prism pieces. The light guide member has an incident surface on which light is incident, and first and second surfaces facing each other, and the second surface is a light-emitting surface. The plurality of prism pieces are provided on the first surface and reflect the light passing through an inside of the light guide member toward the second surface. The plurality of prism pieces include two or more prism pieces having different inclination angles with respect to an incident surface depending on a position in at least a first direction along both the incident surface and the first surface. The inclination angles of two or more prism pieces are determined so that the light emitted from the second surface is directed to the outside or the inside of the first direction with respect to a reference light beam as the prism piece is positioned closer to both ends of the first surface in the first direction.
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5.发明申请公开(公告)号：US20170363792A1
公开(公告)日：2017-12-21
申请号：US15426057
申请日：2017-02-07
Inventor： WAHEI AGEMIZU , KAZUMASA TAKATA , KENJI TAKAMOTO
IPC: F21V8/00
CPC classification number: G02B6/006 , G02B6/0036 , G02B6/0068
Abstract: A multicolor display apparatus displays a design pattern by reflecting light beams which are incident into a light guide body by arrays of fine shapes and emitting the reflected light beams from the light emission surface, in which, when it is assumed that the gradation values of red, green, blue, and white at a point where a specific color (to be displayed) of the design pattern of the light guide body is displayed using red, green, blue, and white light are set as I(r). I(g). I(b), and I(w), respectively, and when it is assumed that the gradation values of red, green, and blue in the case of displaying a color close to the specific color using only red, green, and blue light without white light are set as Ir, Ig, and Ib, respectively, the fine shapes for each of red, green, blue, and white colors have a height or a pitch which corresponds to the gradation values I(r), I(g), I(b), and I(w) as follows: I(w)=min(Ir, Ig, Ib), ×A/100; I(r)=Ir−I(w); I(g)=Ig−I(w); I(b)=Ib−I(w). Here, A/100 is less than 1. Thus, it is possible to realize a beautiful white color and realize display which has high color reproducibility without influence due to a machining error and allows a user to feel beautiful.
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Patent Agency Ranking
公开(公告)号：US20250036077A1
公开(公告)日：2025-01-30
申请号：US18912677
申请日：2024-10-11
Inventor： YOSUKE ARAKI , ATSUSHI FUKUI , WAHEI AGEMIZU , KAZUMASA TAKATA , KENICHIRO MASE
Abstract: A hologram manufacturing device includes a master hologram on which a diffraction grating is formed, a duplicate hologram disposed close to the master hologram, a first light source that emits, to the master hologram and the duplicate hologram, a first laser light that satisfies a Bragg diffraction condition in the diffraction grating, a second light source that emits, to the master hologram and the duplicate hologram, a second laser light that does not satisfy the Bragg diffraction condition in the diffraction grating, and a sensor that measures the second laser light. The hologram manufacturing device ends exposure of the duplicate hologram with the first laser light based on a measurement result of the sensor.
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公开(公告)号：US20230375770A1
公开(公告)日：2023-11-23
申请号：US18363188
申请日：2023-08-01
Inventor： YOSUKE ARAKI , WAHEI AGEMIZU , KAZUMASA TAKATA , MASARU FUJITA
IPC: F21V8/00
CPC classification number: G02B6/0046 , G02B6/0038
Abstract: Light control body (6) has first incident surface (7) and first reflection surface (9). First incident surface (7) condenses part of light emitted from light source (1) and emits the light toward incident surface (3) of light guide plate (2). First reflection surface (9) reflects the light that is emitted from light source (1) and does not pass through first incident surface (7), and emits the light toward incident surface (3) of light guide plate (2). First focal position (11) of first incident surface (7) and second focal position (12) of first reflection surface (9) are set at positions that are different from each other and away from the light emission surface of light source (1).
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公开(公告)号：US20180136386A1
公开(公告)日：2018-05-17
申请号：US15730703
申请日：2017-10-11
Inventor： KAZUMASA TAKATA , KENJI TAKAMOTO , WAHEI AGEMIZU
CPC classification number: G02B6/0028 , G02B6/002 , G02B6/003 , G02B6/0031 , G02B6/0036 , G02B6/006 , G02B6/0068 , G02F1/0105 , G06F3/0412
Abstract: A display device capable of displaying a desired pattern using a light guide plate in which plural patterns are recorded. In a light guide plate, light sources allowing light to be incident on a first side surface and a second side surface, first incidental side surface light is reflected to an upper surface side by first reflection parts formed on a bottom surface to display a first pattern, and second incidental side surface light from the second light sources is reflected to the upper surface side by second reflection parts formed on the bottom surface to display a second pattern, in which slopes are provided at parts of the first side surface and the second side surface of the light guide plate, and light reflected on a facing reflection surface and propagating in the light guide plate again is reduced by the slopes.
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公开(公告)号：US20250028108A1
公开(公告)日：2025-01-23
申请号：US18905145
申请日：2024-10-03
Inventor： WAHEI AGEMIZU , KAZUMASA TAKATA
IPC: F21V8/00
Abstract: A surface light-emitting device includes a plurality of light sources, a light guide that guides light emitted from the plurality of light sources, and a controller that controls turn-on operations of the plurality of light sources. The light guide includes a plurality of light controllers on which the light from the plurality of light sources are incident. The plurality of light controllers are disposed side by side in a first direction intersecting optical axes of the plurality of light controllers, the plurality of light sources include a first light source and a second light source, the first light source is disposed on one of the optical axes of the plurality of light controllers, the second light source is disposed at a position away from the optical axes of the plurality of light controllers, and the controller turns on at least one of the first light source and the second light source.
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10.发明申请公开(公告)号：US20220128829A1
公开(公告)日：2022-04-28
申请号：US17497714
申请日：2021-10-08
Inventor： TOMOHISA SAKAGUCHI , WAHEI AGEMIZU , KAZUMASA TAKATA , MASARU FUJITA
Abstract: A light refraction member includes an incident surface on which planar light is incident, a plurality of refractors that refract the planar light, and an emitting surface from which the planar light refracted by the plurality of refractors is emitted as emitted light. The plurality of refractors are provided side by side in a first direction on at least one of the incident surface and the emitting surface, and each of the plurality of refractors has an area in which a direction in which the planar light is refracted changes along a second direction intersecting the first direction.
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