Collection optics for LED array with offset hemispherical or faceted surfaces
First Claim
Patent Images
1. A lighting module, comprising:
- an array of LED light sources on a substrate;
a monolithic structure having multiple lenses for collecting light from the array of multiple LED light sources mounted above the LEDs adjacent the substrate;
wherein each LED light source emits divergent light, wherein for each LED light source there is a lens in the monolithic structure having a first surface with a compound shape of at least two faceted portions separated by a flat portion that is distributable around the LED light source and arranged to collimate the light from the LED, each faceted portion having at least two facets, formed centrally along perpendicular axes of symmetry with other lenses in a square tile pattern; and
wherein each lens approximates a spherical or an aspheric shape relative to its respective LED light source.
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Abstract
An array of LEDs is provided having a lens array for collecting divergent light from each LED. Each lens in the array is associated with a respective LED and has a compound shape including a curved surface that may be spherical or may have an offset aspherical shape. The curved surfaces are centered about each side of its associated LED. The lens may alternatively include faceted surfaces that approximate the curved lens surface.
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Citations
18 Claims
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1. A lighting module, comprising:
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an array of LED light sources on a substrate; a monolithic structure having multiple lenses for collecting light from the array of multiple LED light sources mounted above the LEDs adjacent the substrate; wherein each LED light source emits divergent light, wherein for each LED light source there is a lens in the monolithic structure having a first surface with a compound shape of at least two faceted portions separated by a flat portion that is distributable around the LED light source and arranged to collimate the light from the LED, each faceted portion having at least two facets, formed centrally along perpendicular axes of symmetry with other lenses in a square tile pattern; and wherein each lens approximates a spherical or an aspheric shape relative to its respective LED light source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of manufacturing an LED light module, comprising:
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determining and forming a configuration for an array of lenses so that there is a separate lens for each LED in an array of LEDs on a substrate in a monolithic structure, wherein each lens has a first surface having a compound shape including a faceted portion that is distributed around an LED arranged to collimate the light from the LED, and wherein each lens having a compound shape that includes faceted portions separated by a flat portion, each faceted portion has at least two facets formed centrally along perpendicular axes of symmetry with other lenses in a square tile pattern, the lens being disposed over an LED so that light from each side of the LED is projected into a respective faceted surface, the lenses in the monolithic structure being arranged adjacent the substrate over the array of LEDs. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification