Trailing edge dimmer compatibility with dimmer high resistance prediction
First Claim
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1. An apparatus comprising:
- a controller to provide compatibility between a lamp and a trailing edge dimmer, wherein the controller is configured to;
predict an estimated time when the trailing edge dimmer enters a high resistance state, wherein the time when the trailing edge dimmer enters the high resistance state occurs when the trailing edge dimmer begins phase cutting an alternating current (AC) voltage signal;
operate in a high current mode based on the estimated predicted occurrence of the high resistance state of the trailing edge dimmer; and
operate in a low impedance mode after the AC voltage signal reaches a low voltage threshold.
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Abstract
In at least one embodiment, an electronic system includes a controller, and the controller provides compatibility between an electronic light source and a trailing edge dimmer. In at least one embodiment, the controller is capable of predicting an estimated occurrence of a trailing edge of a phase cut AC voltage and accelerating a transition of the phase cut AC voltage from the trailing edge to a predetermined voltage threshold. In at least one embodiment, the controller predicts an estimated occurrence of the trailing edge of the phase cut AC voltage on the basis of actual observations from one or more previous cycles of the phase cut AC voltage.
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Citations
34 Claims
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1. An apparatus comprising:
a controller to provide compatibility between a lamp and a trailing edge dimmer, wherein the controller is configured to; predict an estimated time when the trailing edge dimmer enters a high resistance state, wherein the time when the trailing edge dimmer enters the high resistance state occurs when the trailing edge dimmer begins phase cutting an alternating current (AC) voltage signal; operate in a high current mode based on the estimated predicted occurrence of the high resistance state of the trailing edge dimmer; and operate in a low impedance mode after the AC voltage signal reaches a low voltage threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method to provide compatibility between a lamp and a trailing edge dimmer, the method comprising:
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predicting an estimated time when the trailing edge dimmer enters a high resistance state, wherein the time when the trailing edge dimmer enters the high resistance state occurs when the trailing edge dimmer begins phase cutting an alternating current (AC) voltage signal; operating a controller of at least a power converter in a high current mode based on the estimated predicted occurrence of the high resistance state of the trailing edge dimmer; and operating the controller in a low impedance mode after the AC voltage signal reaches a low voltage threshold. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 24, 25, 26)
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21. An apparatus comprising:
a controller configured to; predict an estimated time when the trailing edge dimmer enters a high resistance state, wherein the time when the trailing edge dimmer enters the high resistance state occurs when the trailing edge dimmer begins phase cutting an alternating current (AC) voltage signal; and accelerate a transition of the AC voltage from the trailing edge to a predetermined voltage threshold. - View Dependent Claims (23, 27, 29, 31)
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28. A method comprising:
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predicting an estimated time when the trailing edge dimmer enters a high resistance state, wherein the time when the trailing edge dimmer enters the high resistance state occurs when the trailing edge dimmer begins phase cutting an alternating current (AC) voltage signal; and accelerating a transition of the AC voltage from the trailing edge to a predetermined voltage threshold. - View Dependent Claims (30, 32, 33, 34)
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Specification