LED flashlight and heat sink arrangement
First Claim
Patent Images
1. A portable light comprising:
- a heat sink of a thermally conductive material comprising a first generally rectangular planar member, and a second generally rectangular member integrally joined to the first generally rectangular member;
a light emitting diode attached to a broad surface of the first generally rectangular planar member of said heat sink;
an electronic circuit board comprising circuitry for controlling the energizing of said light emitting diode, wherein said electronic circuit board is attached to the second generally rectangular planar member,the circuitry of said electronic circuit board including an electronic component that generates heat when energizing said light emitting diode and generates greater heat under a fault condition, wherein said electronic component is thermally coupled by said electronic circuit board to the second generally rectangular planar member of said heat sink to prevent the temperature of said electronic component from increasing excessively under the fault condition; and
a case for receiving said heat sink, said light emitting diode, said electronic circuit board, and a source of electrical power.
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Abstract
An LED light may comprise a light emitting diode selectively energizable for producing light; an electronic circuit for selectively energizing the light emitting diode; and a heat sink of a thermally conductive material, wherein the light emitting diode is thermally bonded to the heat sink; and wherein the electronic circuit is attached to the heat sink. The light may have a pair of contact springs extending from the heat sink and the electronic circuit may include thermal conductivity enhancing features.
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Citations
84 Claims
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1. A portable light comprising:
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a heat sink of a thermally conductive material comprising a first generally rectangular planar member, and a second generally rectangular member integrally joined to the first generally rectangular member; a light emitting diode attached to a broad surface of the first generally rectangular planar member of said heat sink; an electronic circuit board comprising circuitry for controlling the energizing of said light emitting diode, wherein said electronic circuit board is attached to the second generally rectangular planar member, the circuitry of said electronic circuit board including an electronic component that generates heat when energizing said light emitting diode and generates greater heat under a fault condition, wherein said electronic component is thermally coupled by said electronic circuit board to the second generally rectangular planar member of said heat sink to prevent the temperature of said electronic component from increasing excessively under the fault condition; and a case for receiving said heat sink, said light emitting diode, said electronic circuit board, and a source of electrical power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 69, 70, 71, 72, 73)
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18. A light comprising:
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a heat sink of a thermally conductive material, said heat sink comprising a first generally rectangular planar member defining four edges and two opposing broad surfaces, two opposing elongated members each integrally joined to the first rectangular planar member proximate two opposing edges thereof, and a second generally rectangular member integrally joined at opposing ends thereof to the two elongated members and integrally joined to the first generally rectangular member; a light emitting diode attached to a broad surface of the first generally rectangular planar member of said heat sink between the two elongated members thereof; an electronic circuit board comprising circuitry for energizing said light emitting diode, wherein said electronic circuit board is attached to the second generally rectangular planar member between the two opposing elongated members; and a case for receiving said heat sink, said light emitting diode, said electronic circuit board, and a source of electrical power. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 74)
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35. A portable light comprising:
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a heat sink of a thermally conductive material; a light emitting diode selectively energizable for producing light, wherein said light emitting diode is thermally coupled to said heat sink; an electronic circuit for selectively energizing said light emitting diode, wherein said electronic circuit includes an electronic circuit board having an attachment location at which it is attached to said heat sink, said electronic circuit including an electronic component for selectively controlling the energizing of said light emitting diode, wherein said electronic component generates heat and is disposed on said electronic circuit board proximate the location at which said electronic circuit board is attached to said heat sink, said electronic circuit board further including a conductive element that reduces the thermal resistance between the heat generating component and the attachment location thereof, wherein the electronic component generates greater heat under a fault condition, and wherein said electronic component is thermally coupled by the conductive element of said electronic circuit board to said heat sink to prevent the temperature of said electronic component from increasing excessively under the fault condition; and a case for receiving said heat sink, said light emitting diode, said electronic circuit, and a source of electrical power. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 75)
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45. A portable light comprising:
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a heat sink of a thermally conductive material; a light emitting diode selectively energizable for producing light, wherein said light emitting diode is thermally coupled to said heat sink; an electronic circuit for selectively energizing said light emitting diode, wherein said electronic circuit includes an electronic circuit board having an attachment location at which it is attached to said heat sink, said electronic circuit further including a pair of electrical contact springs supported by and extending away from said heat sink in the same direction for electrically contacting the terminals of a source of electrical power; and a case for receiving said heat sink, said light emitting diode, said electronic circuit, and the source of electrical power. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 76, 77, 78, 79, 80)
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56. A light comprising:
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a heat sink of a thermally conductive material, said heat sink comprising a first generally rectangular planar member defining four edges and two opposing broad surfaces, two opposing elongated members each integrally joined to the first rectangular planar member proximate two opposing edges thereof, and a second generally rectangular member integrally joined at opposing ends thereof to the two elongated members and integrally joined to the first generally rectangular member; a light emitting diode bonded by a thermally conductive adhesive to a central region of a broad surface of the first generally rectangular planar member of said heat sink between the two elongated members thereof; wherein said heat sink has at least two spaced apart alignment features for positioning said light emitting diode on the central region of the broad surface of the first generally rectangular member of said heat sink for the bonding of said light emitting diode thereto; a first electronic circuit board adjacent the second generally rectangular member of said heat sink comprising circuitry for energizing said light emitting diode, wherein said first electronic circuit board is supported at one end by a fastener engaging the second generally rectangular member of said heat sink; a second electronic circuit board supporting said light emitting diode, wherein electrical contacts of said light emitting diode are electrically connected to respective conductive areas of said second electronic circuit board and to said first electronic circuit board; and a case for receiving said heat sink, said light emitting diode, said first and second electronic circuit boards, and a source of electrical power. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68)
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81. A portable light comprising:
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a heat sink of a thermally conductive material; a light emitting diode selectively energizable for producing light, wherein said light emitting diode is thermally coupled to said heat sink; an electronic circuit for selectively energizing said light emitting diode, wherein said electronic circuit has an attachment location at which it is attached to said heat sink, said electronic circuit further including a switch and a processor responsive to said switch for controlling the energizing of said light emitting diode; said electronic circuit further including a fuse connected in series with a source of electrical power and said light source; said electronic circuit further including an electronic component that generates heat when energizing said light emitting diode and generates greater heat under a fault condition, wherein said electronic component is thermally coupled via the attachment location of said electronic circuit to said heat sink to prevent the temperature of said electronic component from increasing excessively under the fault condition; and a case for receiving said heat sink, said light emitting diode, said electronic circuit, and the source of electrical power. - View Dependent Claims (82, 83)
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84. A portable light comprising:
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a heat sink of a thermally conductive material; a light emitting diode selectively energizable for producing light, wherein said light emitting diode is thermally coupled to said heat sink; an electronic circuit for selectively energizing said light emitting diode, wherein said electronic circuit has an attachment location at which it is attached to said heat sink, said electronic circuit further including a switch and a processor responsive to said switch for controlling the energizing of said light emitting diode; said electronic circuit further including a fuse connected in series with a source of electrical power and said light source; said electronic circuit further including an electronic component that generates heat when energizing said light emitting diode and generates greater heat under a fault condition, wherein said electronic component is thermally coupled via the attachment location of said electronic circuit to said heat sink to prevent the temperature of said electronic component from increasing excessively under the fault condition; and a case for receiving said heat sink, said light emitting diode, said electronic circuit, and the source of electrical power; wherein said electronic circuit further includes; a pair of contact springs extending away from said heat sink in the same direction for contacting the source of electrical power;
oran electronic circuit board providing the attachment location;
ora pair of contact springs extending away from said heat sink in the same direction for contacting the source of electrical power and an electronic circuit board providing the attachment location.
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Specification