Electroluminescent lamp and dial for a timepiece
US5764599A · kind A · utility
3Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Aug 12, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electroluminescent lamp constructed by screen printing, in succession on a rigid metal plate in the shape of a watch dial, a first of barium titanate, a second layer of phosphor particles in a polymerizable binder, a light transmissive third layer of indium tin oxide, and a conductive peripheral ring of silver epoxy. A transparent dial overlay of Mylar.TM. film with timekeeping indicia fits within the conductive ring. The conductive ring and the substrate serve as the electrodes for the lamp, which illuminates the dial overlay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.