Patent ID: 8016460
Filing Date: 2011-09-13
Classification: G02B,H01L

Abstract:
1. A converging element for a light-emitting diode (LED), adapted to converge a light ray emitted from a light-emitting chip to enable the light ray to form an approximately parallel light ray after passing through the converging element for an LED, comprising: a cylinder, disposed on the light-emitting chip, wherein a height and a radius of the cylinder satisfy Equation 1: wherein h is the height of the cylinder, a is the radius of the cylinder, and d is a side length of the light-emitting chip; and a first lens, disposed on the other end of the cylinder opposite to the light-emitting chip, wherein the first lens has a first plane and a first curved surface opposite to each other, the first plane of the first lens is attached to the cylinder, and the first curved surface of the first lens satisfies Equation 2: wherein n