Control circuit for a phase-cut dimmer and a method of controlling a phase-cut dimmer
US9408277B2 · kind B2 · utility
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15Claims
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Assignee
Inventor
Key dates
| Filing date | Apr 23, 2013 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Jun 18, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/2573
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control circuit is disclosed for lighting applications having a load and an AC leading-edge phase-cut dimmer comprising a phase-cutting switch, the circuit comprising: a detection circuit for detecting a deadlock state of the dimmer; and an activation circuit configured to, in response to the detection circuit detecting a deadlock state of the dimmer, supply a DC current to the dimmer to exit the deadlock state by activating the dimmer. A method of operating such a control circuit is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.