Method and apparatus providing universal voltage input for solid state light fixtures
US8629625B2 · kind B2 · utility
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2References
20Claims
0Family size
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Key dates
| Filing date | Jul 23, 2010 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Dec 27, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for providing universal voltage input to a solid state lighting fixture (140) supplied by an AC line voltage includes converting an analog voltage signal corresponding to the line voltage to digital values indicating a waveform of the line voltage (S312) and calculating slopes corresponding to rising edges of the waveform using select values of the digital values (S453). A value of the line voltage is determined based on the calculated slopes (S458).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.