Control circuit for fluorescent lamps
US5585699A · kind A · utility
6Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1995 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Mar 7, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dimmer logic for fluorescent lamps is described which operates after the principal of a two-point circuit with two stable operating points, where in dimmer operation periodic changes between the two operating points takes place. By periodically switching on and off the fluorescent lamp the average brightness of the fluorescent lamp is reduced. The dimmer logic can be extended by sensor inputs for current and voltage to control the voltage, current and power. By appropriate design of the dimmer logic a control and protection circuit for overcurrent, overvoltage and overpower can be realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.