Eliminating silver migration in EL lamps
US7609004B2 · kind B2 · utility
0Cited by
4References
13Claims
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Assignee
Inventors
Key dates
| Filing date | Apr 5, 2007 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Apr 5, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A net negative charge is used to eliminate silver migration in an EL lamp. An electrode containing silver, either the entire electrode, a bus bar on the electrode, or a contact area on the electrode, receives a net negative charge while the EL lamp is being driven with alternating current. The net negative charge can be provided by the driver itself or by a current source, such as a battery or a charged capacitor; or by asymmetric current means in the current path of the EL lamp, including the lamp itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.