Lighting assembly with LEDs and optical elements
First Claim
1. A lighting apparatus comprising:
- a circuit board;
a plurality of light emitting diodes (LEDs) attached to the circuit board, the LEDs being arranged in an array of row and columns, wherein all of the LEDs attached to the circuit board are arranged in a single plane;
a support substrate supporting the circuit board, the support structure made of a thermally conductive material and configured to dissipate heat during operation of the LEDs; and
a plurality of optical elements configured to redirect light from the plurality of LEDs, each optical element being substantially the same as all other optical elements and configured to shape and direct light in a rectangular waveform, wherein each LED is associated with a single optical element and each optical element is associated with a single LED, wherein each optical element comprises a convex portion at least partially overlying the associated LED, and wherein the optical elements are part of an outer surface that forms an exposed surface of the lighting apparatus;
wherein the lighting apparatus is configured so that when all of the LEDs are operating a substantially rectangular surface that is off-center relative to the lighting apparatus is illuminated with an illumination level and a uniformity; and
wherein failure of one or more of the LEDs will cause the illumination level of light impinging the substantially rectangular surface to decrease while the uniformity of light impinging the substantially rectangular surface remains substantially the same.
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Accused Products
Abstract
A lighting apparatus includes a circuit board and light emitting diodes (LEDs) attached to the circuit board. The LEDs are arranged in an array of row and columns and are attached to the circuit board are arranged in a single plane. A support substrate supports the circuit board. Optical elements are configured to redirect light from the plurality of LEDs. Each optical element is substantially the same as all other optical elements. Each LED is associated with a single optical element and each optical element is associated with a single LED. The lighting apparatus is configured to direct light away from the circuit board so that the light is directed so as to illuminate a substantially rectangular area that is off-center relative to the light assembly. The substantially rectangular area has an edge that is at least 14 feet in length.
902 Citations
29 Claims
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1. A lighting apparatus comprising:
a circuit board; a plurality of light emitting diodes (LEDs) attached to the circuit board, the LEDs being arranged in an array of row and columns, wherein all of the LEDs attached to the circuit board are arranged in a single plane; a support substrate supporting the circuit board, the support structure made of a thermally conductive material and configured to dissipate heat during operation of the LEDs; and a plurality of optical elements configured to redirect light from the plurality of LEDs, each optical element being substantially the same as all other optical elements and configured to shape and direct light in a rectangular waveform, wherein each LED is associated with a single optical element and each optical element is associated with a single LED, wherein each optical element comprises a convex portion at least partially overlying the associated LED, and wherein the optical elements are part of an outer surface that forms an exposed surface of the lighting apparatus; wherein the lighting apparatus is configured so that when all of the LEDs are operating a substantially rectangular surface that is off-center relative to the lighting apparatus is illuminated with an illumination level and a uniformity; and wherein failure of one or more of the LEDs will cause the illumination level of light impinging the substantially rectangular surface to decrease while the uniformity of light impinging the substantially rectangular surface remains substantially the same. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A lighting apparatus comprising:
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a circuit board; a plurality of light emitting diodes (LEDs) attached to the circuit board, the LEDs being arranged in an array of row and columns, wherein all of the LEDs attached to the circuit board are arranged in a single plane; a heat sink thermally coupled to the circuit board, the heat sink made of a thermally conductive material and configured to dissipate heat during operation of the LEDs; and a plurality of optical elements configured to redirect light from the plurality of LEDs, each optical element being substantially the same as all other optical elements and configured to shape and direct light in a rectangular waveform, wherein each LED is associated with a single optical element and each optical element is associated with a single LED and wherein each optical element is configured to direct light from each LED away from the circuit board so as to illuminate a same substantially rectangular surface that is off-center relative to the lighting apparatus, the substantially rectangular surface having an edge that is at least 14 feet in length. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A lighting apparatus comprising:
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a circuit board; a plurality of light emitting diodes (LEDs) attached to the circuit board, the LEDs being arranged in an array of row and columns, wherein all of the LEDs attached to the circuit board are arranged in a single plane; a heat sink thermally coupled to the circuit board, the heat sink made of a thermally conductive material and configured to dissipate heat during operation of the LEDs; and a plurality of optical elements configured to redirect light from the plurality of LEDs, each optical element being substantially the same as all other optical elements and configured to shape and direct light in a rectangular waveform; wherein each LED is associated with a single optical element and each optical element is associated with a single LED; wherein the lighting apparatus is configured so that when all of the LEDs are operating, a substantially rectangular surface is illuminated with an illumination level and a uniformity; wherein failure of one or more of the LEDs will cause the illumination level of light impinging the substantially rectangular surface to decrease while the uniformity of light impinging the substantially rectangular surface remains substantially the same; wherein the substantially rectangular surface has an edge that is at least 24 feet in length; wherein the lighting apparatus is configured to direct light away from the circuit board so that the light is directed so as to illuminate the substantially rectangular surface that is off-center relative to the light assembly; wherein the optical elements are part of an outer surface that forms an exposed surface of the lighting apparatus; and wherein the light assembly is configured to illuminate the substantially rectangular surface being parallel to the circuit board.
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Specification