Active diode protection apparatus in metal halide lamps
US6177765A · kind A · utility
0Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1999 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Dec 10, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/827
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A metal halide lamp, having a cold fill pressure of at least 50 torr, incorporates a starter circuit with an active device to protect the diode included therein. The active portion of the starter circuit, either removes a voltage multiplying circuit portion, from the starter circuit or shorts out the diode by shunting action of the switch. The voltage multiplier circuit portion is connected across the main electrodes, wherein the voltage multiplier circuit portion increases the starting voltage applied to the starter electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.