Electroluminescent device having a resistive backing layer
US4652794A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1983 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Dec 6, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electroluminescent device has an active electroluminescent layer 3 backed by a resistive layer 4 formed of an amorphous chalcogenide glass. The amorphous chalcogenide glass may comprise germanium, arsenic and/or antimony and selenium. The device comprises a glass base 1 on which there is supported a patterned transparent electrically conducting layer 2, the active luminescent layer 3, the amorphous chalcogenide glass backing layer 4, an optional dielectric layer 5 and an electrode 6. When an operating voltage is applied between layer 2 and electrode 6 the pattern in layer 2 becomes visible through base layer 1 and the contrast of the pattern is enhanced by the dark background produced by the backing layer 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.