Lighting device with transparent substrate, heat sink and LED array for uniform illumination regardless of number of functional LEDs
DCFirst Claim
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1. A light assembly comprising:
- a thermally conductive support structure configured for outdoor use, wherein the support structure protects electronic components attached to the support structure from direct contact with rainwater, wherein the support structure comprises an attachment point for securing the support structure to a weatherproof mount designed for outdoor use;
a heat sink;
a substantially planar circuit board attached to the support structure;
a plurality of LEDs attached to the circuit board, wherein the LEDs are arranged in an array configuration; and
a single transparent substrate overlying all LEDs attached to the circuit board, wherein the transparent substrate includes a plurality of convex optical elements, each convex optical element overlying an associated one or more of the LEDs;
wherein the light assembly is configured to direct light from the LEDs towards an area in a manner that does not create hot spots or result in dead spots on the area regardless of whether all of the LEDs of the plurality of LEDs or some of the LEDs of the plurality of LEDs are functional.
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Abstract
A lighting device includes a heat sink having fins on a first side and a mounting surface of a second side opposite the first side, a substrate attached to the mounting surface, a number of LEDs attached to the substrate, and a single transparent substrate with a number of optical elements, each optical element overlying an associated one of the LEDs. The device configured to direct light from the LEDs towards an area in a manner that does not create hot spots or result in dead spots on the area regardless of whether all of the LEDs of the plurality of LEDs or some of the LEDs of the plurality of LEDs are functional.
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Citations
30 Claims
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1. A light assembly comprising:
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a thermally conductive support structure configured for outdoor use, wherein the support structure protects electronic components attached to the support structure from direct contact with rainwater, wherein the support structure comprises an attachment point for securing the support structure to a weatherproof mount designed for outdoor use; a heat sink; a substantially planar circuit board attached to the support structure; a plurality of LEDs attached to the circuit board, wherein the LEDs are arranged in an array configuration; and a single transparent substrate overlying all LEDs attached to the circuit board, wherein the transparent substrate includes a plurality of convex optical elements, each convex optical element overlying an associated one or more of the LEDs; wherein the light assembly is configured to direct light from the LEDs towards an area in a manner that does not create hot spots or result in dead spots on the area regardless of whether all of the LEDs of the plurality of LEDs or some of the LEDs of the plurality of LEDs are functional. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A light assembly comprising:
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a thermally conductive support structure configured for outdoor use, wherein the support structure protects electronic components attached to the support structure from direct contact with rainwater, wherein the support structure comprises an attachment point for securing the support structure to a weatherproof mount designed for outdoor use; a heat sink; a substantially planar circuit board attached to the support structure; a plurality of LEDs attached to the circuit board, wherein the LEDs are arranged in an array configuration, the LEDs being thermally coupled to the heat sink; and a single transparent substrate overlying all LEDs attached to the circuit board, wherein the transparent substrate includes a plurality of convex optical elements; wherein each convex optical element overlies an associated one of the LEDs; wherein each of the plurality of optical elements is configured to direct light from each LED in three primary directions; wherein each convex optical element includes a first portion, a second portion, and a third portion; wherein the first portion of each convex optical element is configured to direct light from the associated LED in a first primary direction, the second portion of each convex optical element is configured to direct light from the associated LED in a second primary direction, and the third portion of each convex optical element is configured to direct light in a third primary direction; wherein the first primary direction is a lateral direction, the second primary direction is also a lateral direction and the third primary direction is approximately orthogonal to the first and second lateral directions; and wherein the light assembly is configured to direct light from the LEDs towards an area in a manner that does not create hot spots or result in dead spots on the area regardless of whether all of the LEDs of the plurality of LEDs or some of the LEDs of the plurality of LEDs are functional. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A light assembly comprising:
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a thermally conductive support structure configured for outdoor use, wherein the support structure protects electronic components attached to the support structure from direct contact with rainwater, wherein the support structure comprises an attachment point for securing the support structure to a weatherproof mount designed for outdoor use, and wherein the support structure serves as a heat sink; a substantially planar circuit board attached to the support structure; a plurality of LEDs attached to the circuit board, wherein the LEDs are arranged in an array configuration; and a transparent substrate overlying all LEDs attached to the circuit board, wherein the transparent substrate includes a plurality of convex optical elements, each convex optical element overlying an associated one of the LEDs, wherein a surface the transparent substrate is an outermost of the light assembly; wherein the light assembly is configured to direct light from the LEDs towards a substantially rectangular area that is off-center relative to the light assembly, the light being directed in a manner that does not create hot spots or result in dead spots on the substantially rectangular area regardless of whether all of the LEDs of the plurality of LEDs or some of the LEDs of the plurality of LEDs are functional.
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30. A light assembly comprising:
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a thermally conductive support structure configured for outdoor use, wherein the support structure comprises an attachment point for securing the support structure to a weatherproof mount designed for outdoor use; a substantially planar circuit board attached to the support structure; a plurality of LEDs attached to the circuit board, wherein the LEDs are arranged in an array configuration, wherein all of the LEDs attached to the circuit board are arranged in a single plane, and wherein the thermally conductive support structure is configured to serve as a heat sink and dissipate heat during operation of the LEDs; and a single transparent substrate overlying all LEDs attached to the circuit board, wherein the transparent substrate includes a plurality of optical elements, each optical element overlying an associated one or more of the LEDs, wherein the optical elements are configured to redirect light from the plurality of LEDs, each optical element being substantially the same as all other optical elements, 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 light assembly; wherein the light assembly is configured to direct light from the LEDs towards an area in a manner that does not create hot spots or result in dead spots on the area regardless of whether all of the LEDs of the plurality of LEDs or some of the LEDs of the plurality of LEDs are functional.
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Specification