VERSATILE SEALED LED LAMP
First Claim
1. A lamp assembly comprising:
- a circuit board having an electrically insulating layer of material, a thermally conductive backing layer, and one or more electrically conductive traces disposed on a first major surface of the electrically insulating layer of material an opposing surface of which is in thermal contact with a surface of the thermally conductive backing layer;
one or more light-emitting devices disposed on the circuit board, in thermal contact with the circuit board, and in electrical contact with at least one of the electrically conductive traces;
a heat sink composed of thermally conductive material a surface of which is in thermal contact with the thermally conductive backing layer;
a gasket having a first surface and an opposing second surface, the first surface being in mechanical contact with a surface of the circuit board;
a bezel a surface of which is in mechanical contact with the second surface of the gasket; and
one or more fasteners configured to apply force between the bezel and the heat sink resulting in the application of pressure between the bezel and the gasket, between the gasket and the circuit board, and between the circuit board and the heat sink.
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Accused Products
Abstract
A lamp assembly (1800) may include a circuit board (201), one or more light-emitting devices (100) disposed on the circuit board (201), a heat sink (600) in thermal contact with a surface of the circuit board (201), a gasket (700) with a first surface in mechanical contact with the circuit board (201), a bezel (800) a surface (805) of which is in mechanical contact with a second surface of the gasket (700), and one or more fasteners (901) that may apply a force between the bezel (800) and the heat sink (600). A lamp array (2100) may include two or more lamp assemblies (1800), not all of which supply illumination with the same spectral characteristic, and a bearing mount (2000) that may support each lamp assembly (1800) and allow each to be oriented rotationally. A supply circuit (2500, 2600) may include a nonlinear resistive element (2501, 2601).
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Citations
62 Claims
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1. A lamp assembly comprising:
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a circuit board having an electrically insulating layer of material, a thermally conductive backing layer, and one or more electrically conductive traces disposed on a first major surface of the electrically insulating layer of material an opposing surface of which is in thermal contact with a surface of the thermally conductive backing layer; one or more light-emitting devices disposed on the circuit board, in thermal contact with the circuit board, and in electrical contact with at least one of the electrically conductive traces; a heat sink composed of thermally conductive material a surface of which is in thermal contact with the thermally conductive backing layer; a gasket having a first surface and an opposing second surface, the first surface being in mechanical contact with a surface of the circuit board; a bezel a surface of which is in mechanical contact with the second surface of the gasket; and one or more fasteners configured to apply force between the bezel and the heat sink resulting in the application of pressure between the bezel and the gasket, between the gasket and the circuit board, and between the circuit board and the heat sink. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A lamp array comprising:
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two or more lamp assemblies, one of which supplies illumination with a first spectral characteristic and another of which supplies illumination with a second spectral characteristic different from the first spectral characteristic, each of which lamp assemblies includes two or more light-emitting devices, and a bearing mount having one or more bearings supporting each lamp assembly in a manner that allows each lamp assembly to be individually oriented rotationally about an axis of rotation. - View Dependent Claims (34, 35, 36, 37, 38)
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39. A supply circuit comprising:
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an output terminal for providing current to a load; a drive voltage terminal for receiving an electromotive force for driving current through a load; and a nonlinear resistive element with a first terminal electrically connected to the drive voltage terminal and a second terminal electrically connected to the output terminal, the nonlinear resistive element having a dynamic electrical resistance that varies with the magnitude of the electrical current through the nonlinear resistive element, the resistance tending to rise when the magnitude of the electrical current rises and to fall when the magnitude of the electrical current falls. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A supply circuit comprising:
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an output terminal for providing current to a load; a common terminal for returning current from a load;
a drive voltage terminal for receiving the electromotive force for driving current through a load;a surge-limiting circuit having a first terminal electrically connected to the drive voltage terminal and having a second terminal electrically connected to the output terminal, which surge-limiting circuit is capable of limiting the magnitudes of current surges that may result from temporary excesses in electromotive force between the drive voltage terminal and the common terminal; a first alternating-current power terminal for providing alternating current to a circuit; a second alternating-current power terminal for returning alternating current from a circuit; a rectifier with a first alternating-current input terminal electrically connected to the first alternating-current power terminal, a second alternating-current input terminal electrically connected to the second alternating-current power terminal, a first direct-current output terminal electrically connected to the drive voltage terminal, and a second direct-current output terminal electrically connected to the common terminal; a line input terminal for obtaining power from a power line; and a current-impeding circuit having one terminal electrically connected to the line input terminal and another terminal electrically connected to the first alternating-current power terminal, which current-impeding circuit is capable of limiting the magnitudes of current surges that may result from surges in the electric potential between the line input terminal and the second alternating-current power terminal, and which current-impeding circuit includes a nonlinear resistive element having a dynamic electrical resistance that varies with the magnitude of the electrical current through the nonlinear resistive element, the resistance tending to rise when the magnitude of the electrical current rises and to fall when the magnitude of the electrical current falls, and which current-impeding circuit causes to flow through the nonlinear resistive element most of the electrical current that flows through the current-impeding circuit from the line input terminal to the first alternating-current power terminal. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
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Specification