Method and apparatus for a light collection and projection system
First Claim
1. An LED-based lighting system, comprising:
- a PCBA having an LED; and
a lens configured over the LED to subtend light from the LED, the lens including a first discrete region formed of a first convex inner surface and a first convex outer surface, the first discrete region forming a first focus, the lens including a second discrete region formed of a second convex inner surface and a second convex outer surface, the second discrete region forming a second focus, wherein the first inner surface is out of alignment with the second inner surface forming an overhang, the first outer surface is out of alignment with the second outer surface forming an underhang, and wherein the overhang and underhang extend along a plane extending at an incline to a central axis of the lens.
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Accused Products
Abstract
A method and apparatus for collecting and projecting light into a specified target illuminance. A lens may be mounted or otherwise paired to a carrier to form a lens/carrier combination, which may then be mounted to a printed circuit board assembly (PCBA) containing a light emitting diode (LED). The lens/carrier combination may establish an optimum optical relationship between the LED and the lens, such that a predetermined photometric distribution of the LED is collected by the lens, while the remaining photometric distribution of the LED is rejected by the carrier. The lens may include a first pair of opposing surfaces forming a first focus and a second pair of opposing surfaces forming a second focus. The first and second foci may cause light to be subtended into one or more of collimated light focused light, diffused light, and shifted light. The carrier may include an obstruction extending toward the PCBA.
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Citations
20 Claims
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1. An LED-based lighting system, comprising:
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a PCBA having an LED; and a lens configured over the LED to subtend light from the LED, the lens including a first discrete region formed of a first convex inner surface and a first convex outer surface, the first discrete region forming a first focus, the lens including a second discrete region formed of a second convex inner surface and a second convex outer surface, the second discrete region forming a second focus, wherein the first inner surface is out of alignment with the second inner surface forming an overhang, the first outer surface is out of alignment with the second outer surface forming an underhang, and wherein the overhang and underhang extend along a plane extending at an incline to a central axis of the lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 19)
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10. A method, comprising:
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emitting light from an LED in an effective span of emission; forming a lens with a first discrete region out of alignment with a second discrete region along a plane extending at an incline with respect to a central axis of the lens, wherein the first and second discrete regions form one or more of an overhang and an underhang, wherein the first discrete region is formed by a first convex inner surface and a first convex outer surface, wherein the second discrete region is formed by a second convex inner surface and a second convex outer surface; passing a first portion of the effective span through the first discrete region to produce a first subtended span of light; and passing a second portion of the effective span through the second discrete region to produce a second subtended span of light. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An LED-based lighting system, comprising:
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a PCBA having an LED; and a lens configured over the LED to subtend light from the LED, the lens including a first convex inner surface and a first convex outer surface, and a second convex inner surface and a second convex outer surface; wherein the first inner surface is out of alignment with the second inner surface forming an overhang, and the first outer surface is out of alignment with the second outer surface forming an underhang; and
wherein the overhang and underhang extend along a plane extending at an incline to a central axis of the lens.- View Dependent Claims (17, 18, 20)
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Specification