Power supply for lighting and luminaire
First Claim
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1. A power supply for lighting comprising:
- an output element connected between a power source and a lighting load and configured to be switched to a switching operation repeating an ON state and an OFF state and an ON continuation operation continuing the ON state;
a constant current element connected in series with the output element and configured to limit an electric current flowing to the output element; and
a control circuit configured to control a constant current value of the constant current element by controlling the constant current element.
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Abstract
According to one embodiment, a power supply for lighting includes an output element. The output element is connected between a power supply and a lighting load, and configured to be capable of being switched to a switching operation repeating an ON state and an OFF state and an ON continuation operation continuing the ON state.
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Citations
20 Claims
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1. A power supply for lighting comprising:
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an output element connected between a power source and a lighting load and configured to be switched to a switching operation repeating an ON state and an OFF state and an ON continuation operation continuing the ON state; a constant current element connected in series with the output element and configured to limit an electric current flowing to the output element; and a control circuit configured to control a constant current value of the constant current element by controlling the constant current element. - 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 power supply for lighting comprising:
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an output element connected between a power source and a lighting load and configured to be switched to a switching operation repeating an ON state and an OFF state and an ON continuation operation continuing the ON state; and a control circuit configured to switch the output element to the switching operation or the ON continuation operation on the basis of a control signal for controlling an output to the lighting load, wherein the control circuit switches the output element to the ON continuation operation if the output to the lighting load is equal to or smaller than a first output, wherein the control circuit switches the output element to the switching operation if the output to the lighting load is equal to or larger than a second output larger than the first output, and wherein the control circuit switches the output element to the ON continuation operation during a first period and switches the output element to the switching operation during a second period if the output to the lighting load is larger than the first output and smaller than the second output.
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20. A luminaire comprising:
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a lighting load; and a power supply for lighting configured to supply electric power to the lighting load, the power supply for lighting including; an output element connected between a power source and the lighting load and configured to be switched to a switching operation repeating an ON state and an OFF state and an ON continuation operation continuing the ON state; a constant current element connected in series with the output element and configured to limit an electric current flowing to the output element; and a control circuit configured to control a constant current value of the constant current element by controlling the constant current element.
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Specification