Patent ID: 9200778
Filing Date: 2015-12-01
Classification: F21V,F21Y,G02B,G02F,H01L

Abstract:
1. A lens for a light emitting diode formed from a material having a refractive index of n, the lens comprising a base; a first curved circumferential surface extending from the base; a curved center-edge surface extending from the first curved circumferential surface, a curved centermost surface extending from the curved center-edge surface, and an uneven pattern disposed at the curved centermost surface, wherein a distance from a center of the base to a point of the curved center-edge surface is shorter than a radius of curvature for the point of the curved center-edge surface, wherein the curved centermost surface has a concave shape when viewed from the center of the base, wherein the uneven pattern is a minute pattern and is disposed at the entire curved centermost surface, and the uneven pattern is further disposed at the entire curved center-edge surface and the partial curved circumferential surface.