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|Title:||Lens and light-emitting device||Other Titles:||透镜及发光装置||Authors:||To, S
|Issue Date:||9-Jun-2017||Source:||中国专利 ZL 201310484769.0 How to cite?||Abstract:||The invention provides a lens and a light-emitting device. The lens comprises a column-shaped lens main body, wherein the column-shaped lens main body is provided with a bottom surface, a top surface and a circumference surface; the middle of the bottom surface concaves inwards to form a light incoming surface; the top surface is a total reflection surface in the shape of a smooth transitional curved surface and is provided with a center vertex; the circumference surface is a light extracting surface; the light incoming surface comprises a first cylindrical light incoming surface connected with the bottom surface and a second pyramid light incoming surface connected with the first light incoming surface; the second pyramid light incoming surface is provided with a pyramid vertex and pyramid surfaces in the shapes of smooth transitional curved surfaces; the center vertex of the total reflection surface and the pyramid vertex of the second light incoming surface are both on the axis of the lens main body; incident ray getting into the lens main body from the first light incoming surface is directly emitted out by the light extracting surface to form a plurality of first emergent rays upwardly inclined by 0-40 degrees relative to the bottom surface; incident ray getting into the lens main body from the second light incoming surface is reflected by the total reflection surface and then emitted out by the light extracting surface to form a plurality of top emergent rays which are upwardly or downwardly inclined. According to the invention, light leaking is effectively reduced.
|URI:||http://hdl.handle.net/10397/76805||Rights:||Assignee: The Hong Kong Polytechnic University
|Appears in Collections:||Patent|
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