Direct current electroluminescent devices
US4140937A · kind A · utility
Inventors
Key dates
| Filing date | Jul 22, 1976 |
| Grant date | Feb 20, 1979 |
| Priority date | — |
| Expiry date | Jul 22, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an electroluminescent device comprising a layer of electroluminescent material disposed between a pair of electrodes, and a transparent substrate, the electrode between the substrate and the layer of electroluminescent material is transparent and has a surface portion remote from the substrate having properties substantially confining current flow therethrough to discrete regions thereof. In one form the transparent electrode has a first layer adjacent the substrate of electrically-conductive material and a second layer of semiconducting or insulating material. In another form of the transparent electrode this electrode is of a metal oxide and the discrete regions are in a substantially pure form of that metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.