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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：US11940647B2
公开(公告)日：2024-03-26
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：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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公开(公告)号：US11054101B2
公开(公告)日：2021-07-06
申请号：US16998779
申请日：2020-08-20
Inventor： Yosuke Araki , Ryoma Murase , Kazumasa Takata , Jun Hirai , Hiroshi Umiji , Hiroshi Hamano
IPC: F21S41/25 , F21V5/00 , F21V3/02 , F21S41/30 , F21S41/143 , F21W102/135 , F21Y115/10
Abstract: A lighting device includes a light emitting element; a first lens that receives light emitted from the light emitting element and emits first emission light; and a second lens that receives the first emission light and emits second emission light. The first lens has a first emission surface emitting the first emission light, the first emission surface having a convex shape protruding in a Z direction.
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