Uniform luminance and color mixing lens for LED device
First Claim
1. A lens for an LED, comprising:
- a lens body having a centerplane dividing the lens body into symmetric halves, each half having an angular base having a first reflection surface extending substantially perpendicular from the centerplane at a first junction of the lens body and centerplane, the first junction being substantially proximate a first emission point of the LED, and a second reflection surface extending from a distal end of said first reflection surface at an angle having a range of 130 to 150 degrees measured from a line connecting the distal end and first junction, wherein a plane extending along the second reflection surface intersects a distal edge of the half at an intersection point, the intersection point being at an angle having a range of 64 to 74 degrees from the centerplane, measured about the first junction.
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Accused Products
Abstract
A lens for an LED having a lens body providing total internal reflection of light emitted by the LED from a first emission point disposed proximate a first junction of the lens body and centerplane. The lens includes an arcuate light-diffusing edge for diffusing light emitted by the LED and reflected by the angular base and sidewall assembly, the light being diffused by the lens at substantially uniform luminance across a sector of at least 150 degrees centered and measured about the first junction. The light diffused by the lens provides for substantially uniform mixing of at least two different colors of light emitted by a multi-color LED apparatus disposed at the first emission point.
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Citations
20 Claims
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1. A lens for an LED, comprising:
a lens body having a centerplane dividing the lens body into symmetric halves, each half having an angular base having a first reflection surface extending substantially perpendicular from the centerplane at a first junction of the lens body and centerplane, the first junction being substantially proximate a first emission point of the LED, and a second reflection surface extending from a distal end of said first reflection surface at an angle having a range of 130 to 150 degrees measured from a line connecting the distal end and first junction, wherein a plane extending along the second reflection surface intersects a distal edge of the half at an intersection point, the intersection point being at an angle having a range of 64 to 74 degrees from the centerplane, measured about the first junction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A lens for an LED having a lens body having a centerplane, comprising:
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an angular base and sidewall assembly for total internal reflection of light emitted by the LED from a first emission point disposed proximate a first junction of the lens body and centerplane, and an arcuate light-diffusing surface for diffusing light emitted by the LED and reflected by the angular base and sidewall assembly, the light being diffused by the lens at substantially uniform luminance across a sector of at least 150 degrees centered and measured about the first junction. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method of focusing and directing light emitted by an LED, comprising:
reflecting and refracting light emitted from a first emission point of the LED through a lens body having a centerplane dividing the lens body into symmetric halves, each half having an angular base having a first reflection surface extending substantially perpendicular from the centerplane at a first junction of the lens body and centerplane, the first junction being substantially proximate the first emission point of the LED, and a second reflection surface extending from a distal end of said first reflection surface at an angle having a range of 130 to 150 degrees measured from a line connecting the distal end and first junction, wherein a plane extending along the second reflection surface intersects a distal edge of the half at an intersection point, the intersection point being at an angle having a range of 64 to 74 degrees from the centerplane, measured about the first junction. - View Dependent Claims (19, 20)
Specification