SYSTEMS AND METHODS FOR INTELLIGENT DIMMING CONTROL USING TRIAC DIMMERS
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Abstract
Systems and methods for dimming control using TRIAC dimmers are provided. An example apparatus for a power conversion system includes: a process-and-drive component configured to receive an input signal and output a drive signal to a switch to affect a current that flows through a primary winding of a power conversion system. The input signal includes a first pulse associated with a first input period and a second pulse associated with a second input period. The drive signal is associated with a first modulation period for the first input period and a second modulation period for the second input period. The process-and-drive component is further configured to: determine the first modulation period for the first input period; change the drive signal between a first logic level and a second logic level at a modulation frequency during the first modulation period; determine the second modulation period for the second input period.
49 Citations
44 Claims
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1-32. -32. (canceled)
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33. An apparatus for a power conversion system, the apparatus comprising:
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a process-and-drive component configured to receive an input signal and output a drive signal to a switch to affect a current that flows through one or more light emitting diodes, the one or more light emitting diodes being associated with a secondary winding of a power conversion system; wherein; the input signal includes a pulse associated with a pulse width; the process-and-drive component is further configured to; process information associated with the pulse width; and generate the drive signal based on at least information associated with the pulse width so that the current changes non-linearly with the pulse width but a brightness of the one or more light emitting diodes changes linearly with the pulse width. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40)
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41-43. -43. (canceled)
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44. A method for a power conversion system, the method comprising:
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receiving an input signal including a pulse associated with a pulse width; processing information associated with the input signal; and outputting a drive signal to a switch to affect a current that flows through one or more light emitting diodes, the one or more light emitting diodes being associated with a secondary winding of a power conversion system; wherein the processing information associated with the input signal includes processing information associated with the pulse width; and wherein the outputting a drive signal to a switch to affect a current that flows through one or more light emitting diodes includes generating the drive signal based on at least information associated with the pulse width so that the current changes non-linearly with the pulse width but a brightness of the one or more light emitting diodes changes linearly with the pulse width.
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Specification