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SMD type Fresnel LED micro flash light structure

  • US 9,494,843 B2
  • Filed: 06/19/2015
  • Issued: 11/15/2016
  • Est. Priority Date: 02/24/2015
  • Status: Active Grant
First Claim
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1. A SMD type Fresnel LED micro flash light structure, comprising:

  • a housing, having a bottom wall, and a plurality of side walls extended upward from the bottom wall to define a rectangular receiving space, the housing being defined with a longitudinal direction and a lateral direction;

    an array-type light source, disposed on the bottom wall along the longitudinal direction; and

    a micro-cylindrical Fresnel lens, covering on a top end of the housing, wherein the micro-cylindrical Fresnel lens has a cylindrical plano-convex lens, and two teeth-shaped lens sections arranged at two sides of the cylindrical plano-convex lens respectively, each teeth-shaped lens section having a plurality of bar teeth-shaped lenses;

    wherein the cylindrical plano-convex lens and the bar teeth-shaped lenses are parallel to each other along the lateral direction;

    a central axis of the cylindrical plano-convex lens corresponding to a central position of the array-type light source, wherein the teeth-shaped lens sections of the micro-cylindrical Fresnel lens faces the array-type light source, wherein the micro-cylindrical Fresnel lens has a plane opposite to the cylindrical plano-convex lens and the teeth-shaped lens sections;

    wherein each of the bar teeth-shaped lenses has a vertical surface substantially perpendicular to the bottom wall and a curvature, each of the bar teeth-shaped lenses has a curved surface with a curvature gradually increased from an interior to an exterior, each of the bar teeth-shaped lenses has a width along the longitudinal direction gradually decreased from the interior to the exterior.

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