Patent ID: 7473014
Filing Date: 2009-01-06
Classification: H01L,Y10S

Abstract:
1. A light emitting diode lamp comprising: a lead frame having a mounting portion, said lead frame having a center axis; at least one light emitting diode chip mounted on the mounting portion of the lead frame and having an optical axis; and a resin in which said at least one light emitting diode chip is encapsulated, said resin having a tip portion convexly curved forward in an emission direction of the light emitting diode chip such that the tip portion functions as a convex lens, wherein the optical axis of the at least one light emitting diode chip passes through said tip portion of the resin, and wherein the optical axis of the at least one light emitting diode chip coincides with or is parallel to the center axis of the lead frame, and the resin has, at at least the tip portion, at least three different curved surfaces, at least one on each side of a plane, wherein the plane is orthogonal to a light emitting surface of the light emitting diode chip, and either extends from a point on the light emitting surface other than a center of the light emitting surface or extends from a point on an extension of the light emitting surface and wherein the different curved surfaces are specified by different formulae, at least one of which expresses an ellipse having its center on an optical axis of the light emitting diode chip.