Light tube and power supply circuit
DCFirst Claim
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1. A light device for illumination by a power supply circuit comprising:
- a bulb portion,a pair of end caps disposed at opposite ends of the bulb portion, the pair of end caps including a first end cap disposed at one end of the bulb portion, and a second end cap disposed at an end of bulb portion opposite the first end cap, wherein the bulb portion and the pair of end caps are dimensioned to be mounted in a flourescent light tube socket; and
a plurality of light emitting diodes disposed inside the bulb portion along one surface of a circuit board extending between the first end cap and the second end cap for illuminating in response to electrical current to be received from the power supply circuit;
wherein each of the plurality of light emitting diodes is mounted with respect to surface of the circuit board to establish a radiation pattern of light emitted from the bulb portion; and
wherein the arrangement of the circuit board and the bulb portion is such that substantially the entire light output of the light device is emitted away from the one surface and is confined to an included angle by sidewalls extending to a height above the one surface on opposing sides of the plurality of light emitting diodes between the first end cap and the second end cap.
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Abstract
The present invention provides a light tube for illumination by a power supply circuit including a bulb portion and a pair of end caps disposed at opposite ends of the bulb portion. A plurality of light emitting diodes are disposed inside the bulb portion and in electrical communication with the pair of end caps for illuminating in response to electrical current to be received from the power supply circuit.
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Citations
16 Claims
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1. A light device for illumination by a power supply circuit comprising:
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a bulb portion, a pair of end caps disposed at opposite ends of the bulb portion, the pair of end caps including a first end cap disposed at one end of the bulb portion, and a second end cap disposed at an end of bulb portion opposite the first end cap, wherein the bulb portion and the pair of end caps are dimensioned to be mounted in a flourescent light tube socket; and a plurality of light emitting diodes disposed inside the bulb portion along one surface of a circuit board extending between the first end cap and the second end cap for illuminating in response to electrical current to be received from the power supply circuit;
wherein each of the plurality of light emitting diodes is mounted with respect to surface of the circuit board to establish a radiation pattern of light emitted from the bulb portion; andwherein the arrangement of the circuit board and the bulb portion is such that substantially the entire light output of the light device is emitted away from the one surface and is confined to an included angle by sidewalls extending to a height above the one surface on opposing sides of the plurality of light emitting diodes between the first end cap and the second end cap. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a replacement light tube for a flourescent light fixture having a light tube socket, the improvement comprising:
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a plurality of light emitting diodes disposed along a length of a bulb portion between a first end cap and a second end cap mounted on opposite ends of the bulb portion, wherein the plurality of light emitting diodes is mounted on only one side of a circuit board in a light emitting direction; an electrical circuit for illuminating in response to electrical current to be received from the flourescent light fixture; and opaque side walls extending above the one side of the circuit board in the light emitting direction on opposing sides of the plurality of light emitting diodes between the first end cap and the second end cap to confine an entirety of light emitted from the replacement light tube to an included angle of less than about 180°
. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. An LED lighting unit for replacing a conventional fluorescent tube between the opposed electrical receptacles of a conventional fluorescent lighting fixture comprising:
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a rigid, substantially cylindrical structure having a first end and a second end opposite said first end, the cylindrical structure including a support structure and a bulb portion; a first end cap disposed upon said first end of said cylindrical structure and a second end cap disposed upon said second end of said cylindrical structure; a pair of parallel, fluorescent light fixture receptacle connectors extending from each said end cap and configured for installing within the opposed electrical receptacles of the lighting fixture; and a plurality of LEDs disposed along a surface of said support structure in electrical contact with one another and with at least one pair of said pair of connectors extending from said end caps, whereby light is divergently emitted along the length of said lighting unit in an included angle of less than about 180°
;wherein the combination of said support structure and said bulb portion is such that substantially the entire light output of said lighting unit device is emitted away from said surface and is confined to the included angle by sidewalls extending to a height above said surface on opposing sides of said plurality of LEDs between the first end and the second end.
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Specification