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Lighting system with power factor correction control data determined from a phase modulated signal
US8963449B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8963449-B2 |
| Application number | US-201313917194-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 13, 2013 |
| Priority date | Mar 12, 2007 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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Abstract
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A light emitting diode (LED) lighting system includes a power factor correction (PFC) controller that determines at least one power factor correction control parameter from phase delays of a phase modulated signal. In at least one embodiment, a peak voltage of the phase modulated signal is a PFC control parameter used by the PFC controller to control power factor correction and generation of a link voltage by a PFC LED driver circuit. The phase delays. are related to a peak voltage of the phase modulated signal. Thus, in at least one embodiment, detecting the phase delay in one or more cycles of the phase modulated signal allows the PFC controller to determine the peak voltage of the phase modulated signal.
First claim
Opening claim text (preview).
What is claimed is: 1. A light emitting diode (LED) lighting system comprising: a controller comprising: an input to receive a phase delay signal indicating a phase delay of a phase modulated dimmer signal; and a signal processor, coupled to the input, to receive the phase delay signal and determine a control operating parameter from the phase delay signal and to generate a switch control signal using the determined operating parameter to vary an input current to a switching po…
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- H03K17/18Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
Cross-Sectional Technologies · mapped topic
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Frequently asked questions
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- What does patent US8963449B2 cover?
- A light emitting diode (LED) lighting system includes a power factor correction (PFC) controller that determines at least one power factor correction control parameter from phase delays of a phase modulated signal. In at least one embodiment, a peak voltage of the phase modulated signal is a PFC control parameter used by the PFC controller to control power factor correction and generation of a …
- Who is the assignee on this patent?
- Cirrus Logic Inc
- What technology area does this patent fall under?
- Primary CPC classification H03K17/18. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).