Multi-function duty cycle modifier
US8018171B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2008 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Jun 12, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method modify phase delays of a periodic, phase modulated mains voltage to generate at least two independent items of information during each cycle of the periodic input signal. The independent items of information can be generated by, for example, independently modifying leading edge and trailing edge phase delays of each half cycle phase modulated mains voltage. Modifying phase delays for the leading and trailing edges of each half cycle of the phase modulated mains voltage can generate up to four independent items of data. The items of data can be converted into independent control signals to, for example, control drive currents to respective output devices such as light sources to provide multiple items of information per cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.