Solid-state lighting apparatus and methods using energy storage
First Claim
Patent Images
1. A lighting apparatus comprising:
- a plurality of light-emitting diodes (LEDs) coupled in series;
at least one charge storage device coupled to the plurality of LEDs; and
a control circuit configured to divert current to charge the at least one charge storage device while the plurality of LEDs is conducting and to discharge the at least one charge storage device via less than all of the plurality of LEDs.
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Abstract
Some embodiments provide a lighting apparatus including a plurality of lighting circuits coupled in series. Each lighting circuit includes a control circuit configured to selectively provide current to at least one LED and at least one charge storage device coupled to the at least one LED. The control circuit may be configured to cause the at least one charge storage device to be selectively charged from a current source and to be discharged via the at least one LED responsive to a varying input. For example, the control circuit may be configured to limit current through the at least one LED to thereby divert current to the at least one charge storage device.
131 Citations
20 Claims
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1. A lighting apparatus comprising:
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a plurality of light-emitting diodes (LEDs) coupled in series; at least one charge storage device coupled to the plurality of LEDs; and a control circuit configured to divert current to charge the at least one charge storage device while the plurality of LEDs is conducting and to discharge the at least one charge storage device via less than all of the plurality of LEDs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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at least one charge storage device configured to be coupled to a plurality of series-coupled LEDs; and a control circuit configured to be coupled to the plurality of series-coupled LEDs, to divert current to charge the at least one charge storage device while the plurality of series-coupled LEDs is conducting and to discharge the at least one charge storage device via less than all of the plurality of series-coupled LEDs. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A lighting apparatus comprising:
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a plurality of LEDs coupled in series; a current control circuit coupled in series with the plurality of LEDs; and at least one capacitor coupled in parallel with a series combination of the current control circuit and a subset of the plurality of LEDs.
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Specification