Auxiliary lighting control circuit and method for a HID lamp lighting system
US6072286A · kind A · utility
12Cited by
4References
48Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1997 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Jul 24, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/29
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An auxiliary lighting control circuit and method for a lighting system having a HID lamp as the primary light source and an auxiliary light source for providing light when the HID lamp is extinguished or below full brightness but power remains available to the circuit. The circuit senses the HID lamp current and activates a relay to a conductive state using a solid state controller when the HID lamp current is below a predetermined current magnitude to effect the lighting of the auxiliary light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.