Patent ID: 9494843
Filing Date: 2016-11-15
CPC Classification: G02B,G03B,H01L

Claim Text:
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.