LED illumination lens
OwnerYen-Wei Ho, Pei-Wen Koinventors
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Abstract
An LED illumination lens can guide light from light emitting diodes (LEDs). The incident surface and transmission surface of the lens are a part of an elliptical shape. The present invention makes an optical lens which provides that light is refracted twice by the LED illumination lens, and the output light is more uniform and present a long elliptical output light. The curve surface of the transmission surface is selected from elliptical surfaces, rectangular surfaces, square shape surfaces, round surfaces and rectangular surfaces with a cut corner, and polygonal surfaces. An LED illumination lens serves to refract the light beam from the LED by the incident surface and then disperse by the transmission surface 12 into a slender and long elliptical light beam.
Claims12
An LED illumination lens for producing an output light beam through a LED light source, comprising:
- a lens having an incident surface defining an inner surface and a transmission surface opposite to said incident surface at an outer surface thereof, wherein said incident surface is a concave curved surface and said transmission surface is a convex curved surface, wherein a shape of said incident surface is a part of a first elliptical surface and a shape of said transmission surface is a part of a second elliptical surface such that light emitted from the LED light source first enters said incident surface, then passes through said lens and emits through said transmission surface to produce the output light beam, thereby dispersed light emitted at an edge side of the LED light source is refracted to shift to fall within the output light beam while light emitted through a front side of the LED light source is dispersed through said incident surface and said transmission surface to produce the output light beam which is uniform in light intensity while having a long and rod like shape.
An LED illumination device for producing an output light beam, comprising:
- a LED light source;
- and
- a lens having an incident surface defining an inner surface and a transmission surface opposite to said incident surface at an outer surface thereof, wherein said incident surface is a concave curved surface and said transmission surface is a convex curved surface, wherein a shape of said incident surface is a part of a first elliptical surface and a shape of said transmission surface is a part of a second elliptical surface such that light emitted from said LED light source first enters said incident surface, then passes through said lens and emits through said transmission surface to produce the output light beam, thereby dispersed light emitted at an edge side of said LED light source is refracted to shift to fall within the output light beam while light emitted through a front side of said LED light source is dispersed through said incident surface and said transmission surface to produce the output light beam which is uniform in light intensity while having a long and rod like shape.
A method of producing an output light beam through a LED illumination lens and a LED light source, comprising the step of:
- (a) enclosing the LED light source with the lens such that light emitted from the LED light source is guided to pass through the lens to produce the output light beam, wherein said lens has an incident surface defining an inner surface and a transmission surface opposite to said incident surface at an outer surface thereof, wherein said incident surface is a concave curved surface and said transmission surface is a convex curved surface, wherein a shape of said incident surface is a part of a first elliptical surface and a shape of said transmission surface is a part of a second elliptical surface such that light emitted from said LED light source first enters said incident surface, then passes through said lens and emits through said transmission surface to produce the output light beam;
- (b) refracting dispersed light emitted at an edge side of said LED light source and shifting the dispersed light to fall within the output light beam;
- and
- (c) dispersing light emitted through a front side of said LED light source through said incident surface and said transmission surface to produce the output light beam which is uniform in light intensity while having a long and rod like shape.
Dependencies are inferred from the claim text.