Light tube and power supply circuit
DCFirst Claim
1. A replacement light tube for replacing a fluorescent light tube, comprising:
- an elongate tubular housing having a first end and a second end;
a first end cap and a second end cap disposed on the first end and the second end, respectively, each configured to fit with a socket for the fluorescent light tube;
a rigid support structure having a planar portion having a first surface extending within the elongate tubular housing between the first end and the second end and having spaced-apart sidewalls extending away from the first surface and extending within the elongate tubular housing between the first end and the second end, at least a portion of the sidewalls in contact with an interior surface of the elongate tubular housing; and
a plurality of white light emitting diodes supported by a second surface of the planar portion opposite to the first surface and between the first end and the second end, the plurality of white light emitting diodes arranged to emit light through the elongate tubular housing.
2 Assignments
Litigations
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Accused Products
Abstract
A replacement light tube for replacing a fluorescent light tube includes an elongate tubular housing having first and second ends, first and second end caps disposed thereon, each configured to fit with a socket for the fluorescent light tube, and a rigid support structure having a planar portion having a first surface extending within the elongate tubular housing between the first and second ends and having spaced-apart sidewalls extending away from the first surface and extending within the housing between the first and second ends. At least a portion of the sidewalls are in contact with an interior surface of housing. A plurality of white light emitting diodes are supported only by a second surface of the planar portion opposite to the first surface and between the first and second ends, and are arranged to emit light through the housing.
589 Citations
30 Claims
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1. A replacement light tube for replacing a fluorescent light tube, comprising:
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an elongate tubular housing having a first end and a second end; a first end cap and a second end cap disposed on the first end and the second end, respectively, each configured to fit with a socket for the fluorescent light tube; a rigid support structure having a planar portion having a first surface extending within the elongate tubular housing between the first end and the second end and having spaced-apart sidewalls extending away from the first surface and extending within the elongate tubular housing between the first end and the second end, at least a portion of the sidewalls in contact with an interior surface of the elongate tubular housing; and a plurality of white light emitting diodes supported by a second surface of the planar portion opposite to the first surface and between the first end and the second end, the plurality of white light emitting diodes arranged to emit light through the elongate tubular housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A replacement light tube for replacing a fluorescent light tube, comprising:
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an elongate tubular housing having a first end and a second end; a first end cap and a second end cap disposed on the first end and the second end, respectively, each configured to fit with a socket for the fluorescent light tube and comprising a respective pair of electrical bi-pin connectors; a rigid support structure having a planar portion having a first surface extending within the elongate tubular housing between the first end and the second end and having spaced-apart sidewalls extending away from the first surface and extending within the elongate tubular housing between the first end and the second end, at least a portion of the sidewalls in contact with an interior surface of the elongate tubular housing; and a plurality of white light emitting diodes supported by a second surface of the planar portion opposite to the first surface and between the first end and the second end, the plurality of white light emitting diodes arranged to emit light through the elongate tubular housing;
whereinthe support structure divides the elongate tubular housing into a first space in which the plurality of white light emitting diodes are housed and a second space defined by the planar portion, the sidewalls and the interior surface of the elongate tubular housing. - View Dependent Claims (20, 21, 22, 23)
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24. A replacement light tube for replacing a fluorescent light tube, comprising:
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an elongate tubular housing having a first end and a second end; a first end cap and a second end cap disposed on the first end and the second end, respectively, each configured to fit with a socket for the fluorescent light tube; a rigid support structure having a planar portion having a first surface extending within the elongate tubular housing between the first end and the second end and having spaced-apart sidewalls extending away from the first surface and extending within the elongate tubular housing between the first end and the second end, at least a portion of the sidewalls in contact with an interior surface of the elongate tubular housing; a plurality of white light emitting diodes supported by the first surface between the first end and the second end, the plurality of white light emitting diodes arranged to emit light through the elongate tubular housing; and a power supply circuit including a pulse width modulator and a current limiter, the power supply circuit being packaged within one of the end caps. - View Dependent Claims (25, 26)
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27. A replacement light tube for replacing a fluorescent light tube, comprising:
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an elongate tubular housing having a first end and a second end; a first end cap and a second end cap disposed on the first end and the second end, respectively, each configured to fit with a socket for the fluorescent light tube; a rigid support structure having a planar portion having a first surface extending within the elongate tubular housing between the first end and the second end and having spaced-apart sidewalls extending away from the planar portion and extending within the elongate tubular housing between the first end and the second end, at least a portion of the sidewalls in contact with an interior surface of the elongate tubular housing, the planar portion being integral with the sidewalls; a plurality of white light emitting diodes supported by the first surface between the first end and the second end, the plurality of white light emitting diodes arranged to emit light through the elongate tubular housing; and a power supply circuit including a pulse width modulator and a current limiter, at least a portion of the power supply circuit being packaged within the elongate tubular housing or one of the end caps. - View Dependent Claims (28, 29, 30)
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Specification