发明名称 |
ILLUMINATION DEVICE AND LIGHT-GUIDING MEMBER |
摘要 |
In one embodiment, an illumination device includes a light-guiding unit having a light output surface which outputs light and a back surface facing the light output surface, wherein the light-guiding unit has a curved surface in a region of the back surface farther than a first position on the back surface that is away by a first distance from an axis passing the light output surface and the back surface, and a rough surface in a region of the light output surface farther than a second position on the light output surface that is away by a second distance from the axis in a same direction as a direction from the axis toward the first position, and where an intersection of the axis and the back surface is an origin point, and a direction of the axis from the back surface to the light output surface is positive, a normal line of the curved surface intersects with the axis at the positive side of the axis, and an angle formed by a normal line vector at the second position in a direction toward the light output surface from the back surface of the light output surface and a vector in a direction from the curved surface to the second position is equal to or more than a critical angle. |
申请公布号 |
US2014293645(A1) |
申请公布日期 |
2014.10.02 |
申请号 |
US201414206062 |
申请日期 |
2014.03.12 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
OHNO HIROSHI;YAMAMOTO YUICHIRO;KATO MITSUAKI;TAKAMATSU TOMONAO;SHIRATSUCHI MASATAKA;HAYASHIHARA HIROMICHI;TAMURA HIDEO;YAMAMOTO MASAHIKO |
分类号 |
F21V8/00 |
主分类号 |
F21V8/00 |
代理机构 |
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代理人 |
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主权项 |
1. An illumination device comprising a light-guiding unit having a light output surface which outputs light and a back surface facing the light output surface,
wherein the light-guiding unit has a curved surface in a region of the back surface farther than a first position on the back surface that is away by a first distance from an axis passing the light output surface and the back surface, and a rough surface in a region of the light output surface farther than a second position on the light output surface that is away by a second distance from the axis in a same direction as a direction from the axis toward the first position, and where an intersection of the axis and the back surface is an origin point, and a direction of the axis from the back surface to the light output surface is positive, a normal line of the curved surface intersects with the axis at the positive side of the axis, and an angle formed by a normal line vector of the light output surface at the second position in a direction toward the light output surface from the back surface and a vector in a direction from the curved surface to the second position is equal to or more than a critical angle. |
地址 |
MINATO-KU JP |