Low-noise drive circuit for electroluminescent lamp, and electroluminescent lamp assembly comprising same
US6198226A · kind A · utility
14Cited by
10References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Aug 18, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit driving an electroluminescent lamp at a frequency at or in the vicinity of the lower threshold of human hearing, thus reducing objectionable noise otherwise generated by such lamps when operated at high frequencies. In an electroluminescent lamp assembly including such driving circuit is described, the electroluminescent lamp is driven at low frequency, but nonetheless provides a high level of illumination output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.