Multiple pulse width modulation waveforms for plasma lamp
US8957593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2012 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Apr 6, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This disclosure is directed to devices and methods for generating light with electrode-less plasma lamps. More particularly, the present invention provides plasma lamps driven by a radio-frequency source without the use of electrodes inside the bulb, and a pulse-width modulation device that provides RF power regulation, and related methods. The bulb comprises gaseous material with metal halides and/or light emitters that, when powered, substantially stays in an arc shape state. The switching pulse-width modulation device is operable at specific modulation frequencies, duty cycles, and durations to stabilize or control the arc state/mode, which enables consistent and high efficiencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.