LED device for wide beam generation
First Claim
1. A street luminaire comprising:
- a fixture operable to position a plurality of light modules substantially above and parallel to a surface to be illuminated,wherein each light module comprises;
a flat substrate comprising a heat conductive material;
an array of light emitting diodes attached to the substrate; and
an array of lenses positioned to receive light emitted by the light emitting diodes and to illuminate the surface, wherein each lens of the array of lenses of each light module produces an individual pattern of light having a two-dimensional geometric form that is biased street side relative to curbside of the light fixture, wherein an overall intensity of each light module is approximately equal to an individual intensity associated with each lens multiplied by the number of lenses on a light module.
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Accused Products
Abstract
An apparatus and method is characterized by providing an optical transfer function between a predetermined illuminated surface pattern, such as a street light pattern, and a predetermined energy distribution pattern of a light source, such as that from an LED. A lens is formed having a shape defined by the optical transfer function. The optical transfer function is derived by generating an energy distribution pattern using the predetermined energy distribution pattern of the light source. Then the projection of the energy distribution pattern onto the illuminated surface is generated. The projection is then compared to the predetermined illuminated surface pattern to determine if it acceptably matches. The process continues reiteratively until an acceptable match is achieved. Alternatively, the lens shape is numerically or analytically determined by a functional relationship between the shape and the predetermined illuminated surface pattern and predetermined energy distribution pattern of a light source as inputs.
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Citations
10 Claims
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1. A street luminaire comprising:
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a fixture operable to position a plurality of light modules substantially above and parallel to a surface to be illuminated, wherein each light module comprises; a flat substrate comprising a heat conductive material; an array of light emitting diodes attached to the substrate; and an array of lenses positioned to receive light emitted by the light emitting diodes and to illuminate the surface, wherein each lens of the array of lenses of each light module produces an individual pattern of light having a two-dimensional geometric form that is biased street side relative to curbside of the light fixture, wherein an overall intensity of each light module is approximately equal to an individual intensity associated with each lens multiplied by the number of lenses on a light module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification