Light emitting diode with a quasi-omnidirectional reflector

摘要

A light emitting diode with a quasi-omnidirectional reflector comprises a luminescent gel which is coated surrounding a UV light LED chip and a quasi-omnidirectional reflector which is disposed above the luminescent gel. The quasi-omnidirectional reflector is a wild angle cut-off filter which is made by a cooperation of a method for an optical film coating and a property of a total reflection. According to the property of the optical film coating, a light with an incident angle smaller than a critical angle can be reflected, such that a light form the LED chip is confined in the luminescent gel, which makes the luminescent material is excited as much as possible for improving the conversion efficiency of the light. When this LED chip co-works with different colors of the luminescent gels, different colors of lights are excited and produced.