Solid state starter apparatus for a discharge lamp
US3978369A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1975 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Jan 7, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A solid state starter apparatus for a discharge lamp comprises a current limiter, an AC power supply, a discharge lamp of filament-preheating type and a switching circuit for controlling the turning on and off of the discharge lamp. The switching circuit further includes a lightedstate detector circuit for detecting the turning on or off of the discharge lamp, a current breaker circuit controlled by the lighted-state detector circuit to cause the filament current to be turned on and off, and a preheater circuit for starting to supply a filament preheating current in accordance with the magnitude of the current controlled by the current breaker circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.