# US 9,752,738 B2 · LED based searchlight/sky light > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,738 B2 - Document ID: US9752738B2 - Status: Granted - Kind: B2 - Application number: 13/441,831 - Filed: 2012-04-06 - Published: 2013-04-18 - Granted: 2017-09-05 - Earliest claimed: 2011-04-06 - Assignees: Sportsbeams Lighting, Inc. - Applicants: Kevin C. Baxter; Fred H. Holmes - Inventors: Kevin C. Baxter; Fred H. Holmes - Web page: https://patentgrep.com/patent/US9752738B2 ## CPC - F21S 8/003: {Searchlights, i.e. outdoor lighting device producing powerful beam of parallel rays, e.g. for military or attraction purposes (searchlights mounted on a vehicle B60Q1/245)} - F21L 4/02: characterised by the provision of two or more light sources - F21V 7/00: Reflectors for light sources (characterised by cooling arrangements F21V29/505) - F21V 7/0008: {providing for indirect lighting} - F21V 7/06: with parabolic curvature - F21V 7/24: characterised by the material - F21V 29/56: using liquid coolants (F21V29/51 takes precedence) - F21V 21/30: Pivoted housings or frames - F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks - F21W 2131/107: of the exterior of buildings - F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements - F21Y 2113/13: comprising an assembly of point-like light sources - F21Y 2115/10: Light-emitting diodes [LED] - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21L: LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract LED based searchlight/sky light including, in a basic embodiment, a housing; an LED array supported in/by the housing, a heat sink in communication with the LED array, and a reflector supported in the housing such that the LED array is supported by the housing a distance sufficient above the reflector to allow the light emitted by the LED array to be reflected by the reflector. The reflector is preferably a parabolic reflector such that the light emitted by the LED array is reflected by the parabolic reflector in an intense collimated beam. The LED array may be supported above the parabolic reflector a distance equal to the focal length of the parabolic reflector. A power supply may also be included to regulate the electrical current applied to the LED array. ## Claims ### Claim 1 A searchlight, comprising: a frame; a 350 watt array of light emitting diodes or more capable of emitting light upon application of electrical current; said array of light emitting diodes being mounted to a heat sink; said heat sink being liquid cooled and in conductive thermal communication with said array of light emitting diodes; a heat exchanger in fluid communication with said heat sink; a pump for circulating liquid coolant continuously between said heat sink and said heat exchanger in a closed system; at least a 350 watt power supply configured for providing electrical current to said array of light emitting diodes and regulating said electrical current applied to said array of light emitting diodes; a reflector supported by said frame such that said array of light emitting diodes is positioned above said reflector such that said light emitted from said array of light emitting diodes is directed toward said reflector and is reflected by said reflector to produce an intense projected beam of light directed back toward and beyond said array of light emitting diodes; said array of light emitting diodes, said heat sink, and said heat exchanger being positioned so as not to block said intense projected beam of light reflected by said reflector. ### Claim 2 (depends on 1) The searchlight of claim 1 wherein said reflector is a parabolic reflector. ### Claim 3 (depends on 1) The searchlight of claim 1 wherein said heatsink includes a manifold containing said liquid coolant therein in fluid communication with said heat exchanger. ### Claim 4 (depends on 1) The searchlight of claim 1 wherein said power supply is capable of selectively dimming said at least one LED. ### Claim 5 (depends on 1) The searchlight of claim 1 wherein said at least a 350 watt power supply is a switch mode power supply. ### Claim 6 (depends on 1) The searchlight of claim 1 further comprising a fan for moving air across said heat exchanger. ### Claim 7 (depends on 1) The searchlight/skylight of claim 1 wherein said heat exchanger is physically removed from said heat sink. ### Claim 8 A searchlight/sky light for the projection of an intense beam of light into the night sky, comprising: a housing having an interior; a 350 watt LED array or more capable of emitting light upon application of electric current; a liquid cooled heat sink in conductive thermal communication with said LED array; a heat exchanger in fluid communication with said heat sink; a pump for circulating liquid continuously between said heat sink and said heat exchanger supported in said housing; a parabolic reflector supported in said housing; said LED array being positioned above and not in conductive thermal communication with said parabolic reflector at the focal length of said parabolic reflector and directed toward said parabolic reflector such that an intense projected beam of light is produced; said heat exchanger being positioned in said housing between said parabolic reflector and the interior of said housing. ### Claim 9 (depends on 8) The searchlight/sky light of claim 8 wherein said LED array is positioned in said housing such that light emitted from said LED array directed toward said parabolic reflector is reflected in a collimated beam. ### Claim 10 (depends on 8) The searchlight/sky light of claim 8 further including a remotely controllable power supply for regulating the electric current applied to said LED array. ### Claim 11 (depends on 10) The searchlight/sky light of claim 10 wherein said LED array is dimmable by controlling said power supply to vary the electric current applied to said LED array. ### Claim 12 (depends on 8) The searchlight/sky light of claim 8 wherein said heat sink includes a manifold containing a liquid coolant and is in fluid communication with said at least one heat exchanger. ### Claim 13 (depends on 12) The searchlight/sky light of claim 12 further comprising a fan configured for moving air across said heat exchanger. ### Claim 14 (depends on 8) The searchlight/sky light of claim 8 wherein said LED array is comprised of high flux LEDs. ### Claim 15 (depends on 9) The searchlight/sky light of claim 9 wherein said housing is mounted to a base such that said housing is movable with respect to said base in order to vary the direction of said collimated beam. ### Claim 16 (depends on 15) The searchlight/sky light of claim 15 wherein the movement of said housing with respect to said base is controlled remotely. ### Claim 17 (depends on 8) The searchlight/skylight of claim 8 further comprising a polycarbonate cover secured to said housing. ### Claim 18 (depends on 10) The searchlight/skylight of claim 10 wherein said power supply is a switch mode power supply.