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公开(公告)号：US11098868B2
公开(公告)日：2021-08-24
申请号：US16997043
申请日：2020-08-19
Inventor： Tomohisa Sakaguchi , Yosuke Araki , Kazumasa Takata
IPC: F21S41/275 , F21V5/00 , F21S41/143 , F21S41/30 , F21Y115/10 , F21W102/135
Abstract: A lighting device includes light emitting element; first lens that receives light emitted from light emitting element and emits first emission light; and second lens that receives the first emission light and emits second emission light. Second lens includes second convex incident surface receiving the first emission light, second convex emission surface that is provided on a right side of a drawing and emits the second emission light, and second top surface portion and second bottom surface portion each located between second incident surface and second emission surface. Second bottom surface portion includes first inclined surface and second inclined surface formed to be inclined with respect to an optical axis of light emitting element.
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公开(公告)号：US09594204B2
公开(公告)日：2017-03-14
申请号：US14922096
申请日：2015-10-23
Inventor： Tomohisa Sakaguchi , Masaru Fujita
IPC: F21V8/00 , F21V33/00 , A47L9/30 , A47L9/02 , F21W131/30 , F21Y101/00
CPC classification number: G02B6/0038 , A47L9/02 , A47L9/30 , F21V33/0044 , F21W2131/30 , F21Y2101/00 , F21Y2115/10 , G02B6/0073
Abstract: A light guide plate which guides light from light sources at both ends and reflection surface grooves having plural types of reflection surfaces formed on a reverse side of the light guide plate are provided in a direction perpendicular to a front direction of a suction tool, thereby forming light rays radiating to a floor surface from three directions and lighting the floor surface as the surface to be cleaned in front of the suction tool over a wide range.
Abstract translation: 在垂直于吸引工具的前方的方向上设置有导光板，该导光板在两端的光源处引导光，反射面槽具有形成在导光板的背面的多个反射面，从而形成 从三个方向照射到地板表面的光线，并且在大范围内照亮作为待清洁表面的地板表面作为吸入工具的前面。
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公开(公告)号：US11656473B2
公开(公告)日：2023-05-23
申请号：US17235088
申请日：2021-04-20
Inventor： Kazumasa Takata , Masaru Fujita , Wahei Agemizu , Yosuke Araki , Tomohisa Sakaguchi
CPC classification number: G02B27/0972 , B60K37/02 , G02B27/0101 , B60K2370/1529 , B60K2370/347
Abstract: An optical system includes a light guide member having a light-incident surface, a first surface, a light-emitting surface facing the first surface, a first end surface, a second end surface, a plurality of collimating lenses disposed on the light-incident surface and being arranged along a first direction, and a plurality of prism pieces. The plurality of prism pieces include two or more prism pieces having different inclination angles with respect to the light-incident surface depending on positions of the prism pieces in at least the first direction, and each of the inclination angles of the two or more prism pieces is an angle formed between the first direction and the longitudinal axis of a corresponding prism piece. Each of the inclination angles of the two or more prism pieces increases as the corresponding prism piece is positioned closer to any of the first end surface or the second end surface.
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Patent Agency Ranking
公开(公告)号：US09946008B2
公开(公告)日：2018-04-17
申请号：US14885591
申请日：2015-10-16
Inventor： Atsushi Fukui , Masaru Fujita , Tomohisa Sakaguchi
CPC classification number: G02B6/0036 , A47L5/00 , A47L9/244 , A47L9/281 , A47L9/2857 , A47L9/30 , F21V33/0044 , G02B6/0031
Abstract: An indication lighting device provided is capable of reducing the number of electric wiring from a fixed, part to a moving part when an indication part is provided in the moving part's side. The indication lighting device makes indication by emitting light from a light source arranged in a fixed part to an optical waveguide arranged in a moving part, reflecting the light incident on the optical waveguide by reflection surfaces of prisms of the optical waveguide to an indication part provided in a tip side of the optical waveguide to be propagated, and emitting the light propagated inside the optical waveguide through the indication part.
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公开(公告)号：US12204100B2
公开(公告)日：2025-01-21
申请号：US18375665
申请日：2023-10-02
Inventor： Wahei Agemizu , Kazumasa Takata , Masaru Fujita , Tomohisa Sakaguchi , Hiroki Hara , Masaki Amie
Abstract: An optical system includes a light guide member having an incident surface, a first surface and a light emergent surface; and at least one prism provided on the first surface and configured to reflect light received by the incident surface and travelling inside the light guide member, towards the light emergent surface. The light guide member provides an optical path along which the light that has entered through the incident surface is directly reflected from the prism and allowed to emerge from the light emergent surface. The light guide member also provides another optical path along which the light that has entered through the incident surface is once reflected from the second surface, reflected again from the prism, and then allowed to emerge from the light emergent surface. The optical system is configured to be coupled to a light source, to illuminate a display system which projects a virtual image onto a target space.
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公开(公告)号：US11835719B2
公开(公告)日：2023-12-05
申请号：US17509484
申请日：2021-10-25
Inventor： Wahei Agemizu , Kazumasa Takata , Masaru Fujita , Tomohisa Sakaguchi , Hiroki Hara , Masaki Amie
CPC classification number: G02B27/0101 , B60K35/00 , G02B6/003 , G02B6/0036 , B60K2370/1529 , B60K2370/23 , B60K2370/336 , G02B2027/0118
Abstract: An optical system includes a light guide member having a light incident surface, a first surface, and a light emergent surface facing the first surface; and a prism provided in the first surface for reflecting light passing inside the light guide member towards the light emergent surface. The light guide member includes a direct optical path, along which the light that has entered the light guide member through the incident surface is directly reflected from the prism and allowed to emerge from the light emergent surface. At least one of the first surface or the light emergent surface includes a luminous intensity distribution control member configured to control a luminous intensity distribution of light to be extracted from the light emergent surface. The luminous intensity distribution control member includes a Fresnel lens.
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公开(公告)号：US10324246B2
公开(公告)日：2019-06-18
申请号：US16029208
申请日：2018-07-06
Inventor： Atsushi Fukui , Tomohisa Sakaguchi , Kenichiro Mase
IPC: F21V8/00 , G02B6/00 , F21S43/00 , F21S43/237 , F21S43/245 , F21S43/247
Abstract: There is provided a light guide body, containing: a first end region; a second end region located on an opposite side of the first end region; first dots; and second dots having a dot in the first end region being smaller than a dot in the second end region, wherein a size difference between the first dots and the second dots in the first end region is smaller than a size difference between the first dots and the second dots in the second end region.
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公开(公告)号：US10025019B2
公开(公告)日：2018-07-17
申请号：US15328016
申请日：2016-05-10
Inventor： Atsushi Fukui , Tomohisa Sakaguchi , Kenichiro Mase
Abstract: To easily increase display quality of light even in a case of a long light guide body. Depth h1 of a first dot (106) is larger than depth h2 of a second dot (108) in the vicinity of a light source, and, as a location comes closer to an end on an opposite side to the light source, depth h1 of the first dot (106) is reduced, and depth h2 of the second dot (108) is increased. Therefore, it is possible to easily increase display quality of light even in a case of a long light guide body.
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