Power supply for illumination and luminaire
AssigneeToshiba Lighting & Technology Corporation
InventorsHiromichi Nakajima, Toshio Tsuji, Masahiko Kamata
Life of this patent
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Abstract
According to one embodiment, a luminaire includes a light-emitting module, a first lighting circuit and a back-flow preventing circuit. The light-emitting module includes a light-emitting element and a capacitive element. The first lighting circuit is supplied with power from the first power supply and is configured to activate the light-emitting element. The back-flow preventing circuit interrupts current flowing in a direction from the capacitive element to the first lighting circuit.
Claims18
A power supply for illumination, comprising:
- a first lighting circuit to convert and output power supplied from a first power supply;
- a back-flow preventing circuit that is connected to the first lighting circuit and configured to interrupt a current flowing back to an output side of the first lighting circuit from a light-emitting module that is to be connected thereto;
- a second lighting circuit to convert and output power supplied from a second power supply;
- and
- a control circuit that selects one of the first lighting circuit and the second lighting circuit to output power to the light-emitting module.
A luminaire comprising:
- a light-emitting module including a light-emitting element and a capacitive element;
- a first lighting circuit that is supplied with power from a first power supply and configured to activate the light-emitting element;
- a back-flow preventing circuit that interrupts a current flowing in a direction from the capacitive element to the first lighting circuit
- a second lighting circuit that is supplied with power from a second power supply and configured to activate the light-emitting element;
- and
- a control circuit that selects one of the first lighting circuit and the second lighting circuit to activate the light-emitting element.
A method of supplying power to a light-emitting module, comprising:
- using a control circuit to select one of a first power converter and a second power converter as a power source for the light-emitting module;
- and
- supplying power from the power source to the light-emitting module through a back-flow preventing circuit,
- wherein the first power converter is coupled to a first power supply and the second power converter is coupled to a second power supply, and the back-flow preventing circuit is connected to the first power converter and is configured to interrupt a current flowing back to an output side of the first power converter from the light-emitting module that is to be connected thereto.
Dependencies are inferred from the claim text.