Patent ID: 7213945

Claim:
A light emitting diode unit comprising; a super high luminance light emitting element, that can pass an electric current of 250 mA; a base including a heat dissipating member that dissipates heat generated by the light emitting element; a laminated insulating material covering over the heat dissipating member, and a wiring pattern arranged on the insulating material, wherein a boundary between a P-layer and an N-layer of the light emitting element is within several μm to a the wiring pattern, and that the light emitting element is mounted on the wiring pattern via a spacer having a predetermined thickness; and a first lens comprising a reflecting element that reflects light traveling outside of a predetermined angle among the light emitted by the light emitting element and a refracting element that refracts light traveling inside of the predetermined angle among the light emitted by the light emitting element, each of which is integrally formed, with the first lens mounted integrally on the base, wherein the emitted light from the light emitting element is made to travel generally toward the same direction by the reflecting element and the refracting element, wherein the refracting element is a Fresnel lens comprising a convex lens portion arranged at the Fresnel lens center and multiple orbicular zone lens portions having an aspherical refracting surface arranged concentrically around the convex lens portion, a distance between each orbicular zone lens portion and the plane of the light emitting element, parallel to the optical axis, is set to increase for the orbicular zone lens portions located closer to the center, and an angle, between a connecting surface between the refracting surface of one orbicular zone lens portion and a refracting surface of the orbicular zone lens portion of its outer radial neighbor and the optical axis, is set to be identical with or smaller than an angle between the light traveling from an end of the light emitting element toward a bottom end of the connecting surface and the optical axis.