Phase-controlled, multi-electrode type of AC discharge light source
US6822404B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 30, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Dec 30, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J65/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An energy-saving, high-outputting and high-efficiency, electric discharge type of illumination apparatus and associated units having thin divisional electrode pieces arranged at relatively narrow intervals on an electrode-application area, which is defined on the bottom of a flat container. The divisional electrode pieces are fixed to the electrode-application area with an intervening sheet of good electrically insulating and thermally conductive material laid therebetween. A front glass having a fluorescence coating on its inside is placed to confront the electrode-application area. Cooling water is circulated in the electrode-application area for cooling the divisional electrode pieces. A multi-poled magnet sheet arranged outside the electrode-application area is aligned with the electrode-to-electrode space. Lower frequency power supplies are connected to the divisional electrodes to supply that with voltages of the same amplitude. The power supplies are connected in the form of a star and are connected to a controller for controlling the frequency, amplitude and phase of the voltage wave. The power supply uses an insulation transformer to float the voltages appearing at the out…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.