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US 2002/0163808 A1Published application
Lens and Lens Cap with Sawtooth Portion for Light Emitting Diode
AssigneeLumileds Lighting U.S., LLC
InventorsRobert S. West, Gary D. Sasser, James W. Stewart
Life of this patent
Estimating the term…
Abstract
A lens mounted to a light emitting diode package internally redirects light within the lens so that a majority of light is emitted from the lens approximately perpendicular to a package axis of the light emitting diode package. In one embodiment, the light emitted by the light emitting diode package is refracted by a sawtooth portion of the lens and reflected by a total internal reflection portion of the lens.
Claims29
A lens, comprising:
- a body comprising
- a central axis running along a length of said body;
- a first surface for coupling to a light source;
- a sawtooth lens portion whereby the sawtooth lens portion refracts light emitted from said light source such that a majority of light emitted from the sawtooth lens portion is generally perpendicular to said central axis of the body;
- and
- a funnel-shaped lens portion connected to the sawtooth lens portion whereby the funnel-shaped lens portion reflects light emitted from the light source such that a majority of light emitted from the funnel-shaped lens portion is generally perpendicular to the central axis of the body.
3 more elements
A lens cap attachable to a light source, comprising:
- a body comprising
- a central axis running along a length of said body;
- a first surface for coupling to a light source;
- a sawtooth lens portion whereby the sawtooth lens portion refracts light emitted from said light source such that a majority of light emitted from the sawtooth lens portion is generally perpendicular to said central axis of the body;
- a funnel-shaped lens portion connected to the sawtooth lens portion whereby the funnel-shaped lens portion reflects light emitted from the light source such that a majority of light emitted from the funnel-shaped lens portion is generally perpendicular to the central axis of the body;
- and
- an attachment means for coupling the lens cap to the light source whereby said attachment means is coupled to the sawtooth lens portion.
4 more elements
Dependencies are inferred from the claim text.