Adjustable drive circuit for capacitive electroluminescent lamps
US5623185A · kind A · utility
0Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Apr 24, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drive circuit having a converter that provides current pulses that charge a capacitive electroluminescent (EL) lamp to produce light, a switching circuit that switches successive current pulses for progressively charging the EL lamp and an adjustable circuit that permits external control of the switching circuit to provide a plurality of different predetermined numbers of the current pulses to the EL lamp is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.