Electric ballast and a lighting system
US7708440B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2005 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Aug 24, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V29/503
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric ballast attached to the outside of a lighting system. The system comprises a lamp housing with front and rear openings, a front lens closing the front opening, a discharge lamp put in the housing, and a reflector that reflects light of the lamp toward the lens. The ballast comprises: a ballast housing which closes the rear opening and is connected with frame ground via at least one of the lamp housing and the reflector; a lamp socket and an igniter, put in the front of the ballast housing; and a power converter put in the ballast housing. The output of the converter is connected with the socket, which directly connects with the lamp, and the igniter is connected between them. Heat generating parts of the converter are put in the rear of the ballast housing, and the rear functions as a radiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.