Light emitting diode lamp and light emitting diode display unit
First Claim
1. A light emitting diode lamp comprising:
- at least one light emitting diode chip; and
a convex lens through which rays of light emitted from the at least one light emitting diode chip pass, wherein the convex lens has two different curved surfaces, 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 extending from a point on the light emitting surface other than a center of the light emitting surface or extending from a point on an extension of the light emitting surface, and one of the curved surfaces of the convex lens refracts outgoing rays of light from the light emitting diode chip more than the other of the curved surfaces of the convex lens does.
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Accused Products
Abstract
An LED lamp has a convex lens 3 which has an upper portion 5 and a lower portion 6. An upper curved surface 5A of the upper portion is different in shape from a lower curved surface 6A of the lower portion 6 so as to refract rays of light from an LED chip 2 more strongly than the lower curved surface 6A does. This avoids reflection of incident outside light toward a front and hence prevents misrecognition. An interface plane S1 between the upper and lower portions 5 and 6 of the convex lens 3 is located on an upper end face 2A to thereby prevent collection of outgoing light upon the interface plane S1 and generation of an irregular emission peak at the front.
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Citations
20 Claims
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1. A light emitting diode lamp comprising:
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at least one light emitting diode chip; and
a convex lens through which rays of light emitted from the at least one light emitting diode chip pass, wherein the convex lens has two different curved surfaces, 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 extending from a point on the light emitting surface other than a center of the light emitting surface or extending from a point on an extension of the light emitting surface, and one of the curved surfaces of the convex lens refracts outgoing rays of light from the light emitting diode chip more than the other of the curved surfaces of the convex lens does. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A light emitting diode lamp comprising:
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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, two different curved surfaces, 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. - View Dependent Claims (18, 19)
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20. A light emitting diode lamp comprising:
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a plurality of light emitting diode chips; and
a convex lens through which rays of light emitted from the light emitting diode chips pass, wherein the convex lens has two different curved surfaces, one on each side of an interface plane, wherein the interface plane is orthogonal to a light emitting surface of each 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 the plurality of light emitting diode chips are arrayed in a lateral direction parallel to the interface plane.
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Specification