Solid-state lighting apparatus and methods using energy storage
First Claim
1. An apparatus comprising:
- a first current control circuit configured to be coupled to at least one LED and to at least one capacitor such that the first current control circuit is in series with at least one LED and the first current control circuit and the at least one LED are in parallel with the at least one capacitor, the first current control circuit further configured to control current passing from a current source through the at least one LED such that current is diverted to the at least one capacitor in a first state and the at least one capacitor is discharged through the at least one LED in a second state.
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Accused Products
Abstract
An apparatus includes a current control circuit configured to selectively provide current responsive to a varying voltage to at least one LED coupled in series with the first current control circuit and to at least one capacitor coupled to the at least one LED and the first current control circuit. The current control circuit may be configured to cause the at least one capacitor to be selectively charged from a current source and to be discharged via the at least one LED responsive to a varying input, such as a varying current from the current source or a varying voltage applied to the current source. For example, the current control circuit may be configured to limit current through the at least one LED to less than a current provided by the current source.
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Citations
33 Claims
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1. An apparatus comprising:
a first current control circuit configured to be coupled to at least one LED and to at least one capacitor such that the first current control circuit is in series with at least one LED and the first current control circuit and the at least one LED are in parallel with the at least one capacitor, the first current control circuit further configured to control current passing from a current source through the at least one LED such that current is diverted to the at least one capacitor in a first state and the at least one capacitor is discharged through the at least one LED in a second state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A lighting apparatus comprising:
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a current source circuit; at least one LED coupled to an output of the current source circuit; at least one capacitor coupled to the output of the current source circuit; and a current limiter circuit configured to limit a current through the at least one LED to less than a current produced by the current source circuit, wherein the current source circuit and the current limiter circuit are configured to cause the at least one capacitor to be selectively charged via the current source circuit and discharged via the at least one LED responsive to a varying voltage applied to an input of the current source circuit. - View Dependent Claims (21, 22, 23)
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24. A lighting apparatus comprising:
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at least one LED; and a current control circuit configured to provide current to the at least one LED from a power source that produces a periodically varying voltage, the current control circuit configured to cause the at least one LED to produce a light output that comprises clipped non-zero troughs coinciding with nulls of the varying voltage. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A lighting apparatus comprising:
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at least one LED; and a current control circuit configured to provide current to the at least one LED and to at least one capacitor from a power source that produces an AC voltage such that energy is transferred from the power source to the at least one capacitor during a portion of a period of the AC voltage and transferred from the at least one capacitor to the at least one LED near zero crossings of the AC voltage. - View Dependent Claims (31, 32, 33)
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Specification