LED device for wide beam generation
First Claim
1. A light module comprising:
- a substrate; and
a plurality of light sources disposed along the substrate, each light source comprising;
a respective lens; and
a respective light emitting diode coupled to the respective lens and having an axis projecting away from the substrate and through the respective lens,wherein the axis is disposed at an intersection between a first plane and a second plane that are substantial perpendicular to one another,wherein a portion of the respective lens that is disposed on a first side of the first plane is operative to receive light from the respective light emitting diode and to direct the received light through the first plane by reflection, andwherein, in addition to said portion, the respective lens comprises a depression disposed at an intersection between the second plane and an outer surface of the respective lens.
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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
30 Claims
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1. A light module comprising:
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a substrate; and a plurality of light sources disposed along the substrate, each light source comprising; a respective lens; and a respective light emitting diode coupled to the respective lens and having an axis projecting away from the substrate and through the respective lens, wherein the axis is disposed at an intersection between a first plane and a second plane that are substantial perpendicular to one another, wherein a portion of the respective lens that is disposed on a first side of the first plane is operative to receive light from the respective light emitting diode and to direct the received light through the first plane by reflection, and wherein, in addition to said portion, the respective lens comprises a depression disposed at an intersection between the second plane and an outer surface of the respective lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A light module comprising:
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a substrate; and a plurality of light sources disposed along the substrate, each light source comprising; a respective lens; and a respective light emitting diode coupled to the respective lens and having an axis projecting away from the substrate and through the respective lens, wherein the axis is disposed at an intersection between a first plane and a second plane that are substantial perpendicular to one another, wherein a portion of the respective lens that is disposed on a first side of the first plane is operative to receive light from the respective light emitting diode and to direct the received light through the first plane by reflection, wherein the respective lens comprises an outer surface region, wherein the outer surface region comprises a depression extending along an intersection between the second plane and the outer surface region, and wherein the depression divides the outer surface region into two subsurfaces. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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Specification