Electric shock resistant L.E.D. based light
First Claim
1. An LED-based light for replacing a conventional fluorescent tube comprising:
- an elongated highly thermally conductive heat sink having a radially outer portion;
an elongated high-dielectric lens engaging the heat sink and forming a first portion of a housing for the LED-based light;
a high-dielectric cover engaging the heat sink and overlaying substantially all of the radially outer portion of the heat sink to form a second portion of the housing for the LED-based light separate from the first portion such that the cover isolates the radially outer portion of the heat sink from an ambient environment surrounding the LED-based light;
a plurality of LEDs;
a circuit board structure extending substantially the length of the heat sink, the circuit board defining a LED-mounting side of the circuit board and a primary heat transferring side of the circuit board opposite the LED-mounting side, the LEDs mounted on the LED-mounting side at predetermined intervals along the length of the circuit board for uniformly emitting light through an arc of the lens, the circuit board mounted directly to the heat sink on a surface opposing the radially outer portion of the heat sink with the primary heat transferring side of the circuit board in thermally conductive relation with the heat sink and substantially all of the radially outer portion of the heat sink in thermally conductive relation with the high-dielectric cover for highly electrically insulated thermal transmission of heat generated by the LEDs from the circuit board to the ambient environment surrounding the LED-based light; and
a pair of end caps disposed on the opposite ends of the housing, at least one end cap carrying at least one connector configured to electrically connect the LEDs to an existing fixture.
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Accused Products
Abstract
A LED-based replacement light for a fluorescent socket is constructed such that an entirety of a radially outer portion of a tubular housing at least partially defined by a high-dielectric light transmitting portion is formed of a high-dielectric material. Forming a radially outer portion of the tubular housing of a high-dielectric material prevents a person handling the light from being shocked as a result of capacitive coupling occurring when the LED-based replacement light is installed one end at a time. A circuit board is in thermally conductive relation with the tubular housing, allowing for conduction of heat generated by the LEDs from a side of circuit board opposite the LEDs to the tubular housing for dissipation to the ambient environment.
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Citations
10 Claims
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1. An LED-based light for replacing a conventional fluorescent tube comprising:
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an elongated highly thermally conductive heat sink having a radially outer portion; an elongated high-dielectric lens engaging the heat sink and forming a first portion of a housing for the LED-based light; a high-dielectric cover engaging the heat sink and overlaying substantially all of the radially outer portion of the heat sink to form a second portion of the housing for the LED-based light separate from the first portion such that the cover isolates the radially outer portion of the heat sink from an ambient environment surrounding the LED-based light; a plurality of LEDs; a circuit board structure extending substantially the length of the heat sink, the circuit board defining a LED-mounting side of the circuit board and a primary heat transferring side of the circuit board opposite the LED-mounting side, the LEDs mounted on the LED-mounting side at predetermined intervals along the length of the circuit board for uniformly emitting light through an arc of the lens, the circuit board mounted directly to the heat sink on a surface opposing the radially outer portion of the heat sink with the primary heat transferring side of the circuit board in thermally conductive relation with the heat sink and substantially all of the radially outer portion of the heat sink in thermally conductive relation with the high-dielectric cover for highly electrically insulated thermal transmission of heat generated by the LEDs from the circuit board to the ambient environment surrounding the LED-based light; and a pair of end caps disposed on the opposite ends of the housing, at least one end cap carrying at least one connector configured to electrically connect the LEDs to an existing fixture. - View Dependent Claims (2, 3, 4, 5)
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6. An LED-based light for replacing a conventional fluorescent tube comprising:
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a housing including a light transmitting high dielectric lens and a high dielectric cover separate from the lens, the lens and the cover forming an exterior of the housing; an elongate circuit board disposed within the housing; a plurality of LEDs mounted along a length of the circuit board; an elongate heat sink disposed within the housing, the heat sink having an interior circuit board mounting surface opposing a radially outer surface, the circuit board mounted in thermally conductive relation to the circuit board mounting surface, the cover contoured to the radially outer surface and attached in thermally conductive relation to the radially outer surface to directly isolate the radially outer surface from an ambient environment exterior of the housing from a charge occurring in the heat sink as a result of parasitic capacitive coupling between the heat sink and the circuit board resulting from a high-frequency starting voltage designed for starting a conventional fluorescent tube being applied across the circuit board while transmitting heat from the radially outer surface to the ambient environment, and the lens attached to the heat sink and extending adjacent to the LEDs such that light generated by the LEDs transmitted through an arc of the lens; and a pair of end caps disposed on opposing ends of the housing, each end cap including at least one connector configured to physically and electrically connect the LEDs to a conventional fluorescent light fixture. - View Dependent Claims (7, 8, 9, 10)
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Specification