Patent ID: 7453092

Claim:
A light emitting device, comprising: a predetermined optical form that is provided on a surface of an LED element mounted on a base, the predetermined optical form being made to allow an increase in efficiency of taken out light from an inside of the LED element; and a sealing material that seals the LED element, wherein the sealing material has a refractive index of 1.6 or more, the predetermined optical form is formed to comprise a combination of uneven forms having different forms and different depths in a semiconductive surface of a substrate of the LED element, the substrate has a refractive index nearly equal to that of a light emitting layer of the LED element, the LED element is flip mounted on the base, the sealing material comprises an SiO 2 —Nb 2 O 5 based glass as a matrix material, and the sealing material directly contacts the predetermined optical form.