Thin film electroluminescent device
US4774435A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1987 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Dec 22, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thin film electroluminescent device including a transparent substrate having a smooth, planar exterior surface and a rough, non-planar interior surface. Layers of a first transparent electrode of indium tin oxide or tin oxide, an insulating material, for example, silicon oxynitride, manganese activated zinc sulfide, an insulating material, and a second electrode of aluminum are deposited in order on the rough, non-planar interior surface of the substrate. The rough, non-planar interface between the phosphor and insulating material provides surfaces at different angles to the light generated within the phosphor layer preventing light from being trapped within the phosphor layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.