SMD type Fresnel LED micro flash light structure

摘要

A SMD type Fresnel LED micro flash light structure, which is adapted to a camera of a mobile phone, includes a housing, an array-type light source and a micro-cylindrical Fresnel lens. The housing has a bottom wall and a plurality of side walls, and defines a longitudinal direction and a width direction. The array-type light source is disposed on the bottom wall along the longitudinal direction. The micro-cylindrical Fresnel lens covers the housing, and includes a cylindrical plano-convex lens, and two teeth-shaped lens sections respectively arranged at two sides of the cylindrical plano-convex lens. Each teeth-shaped lens section has a plurality of bar teeth-shaped lenses. The cylindrical plano-convex lens and the bar teeth-shaped lenses are parallel to each other along the width direction. A central axis of the cylindrical plano-convex lens is corresponding to a central position of the array-type light source.

主权项

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.