Phosphorescent material for electroluminescent display, comprising silver sulfide in copper sulfide coating on phosphor particles and/or elemental sulfur in dielectric binder for phosphor particles
US4826727A · kind A · utility
15Cited by
9References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1987 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Apr 14, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Electroluminescent display panels comprising copper sulfide coated Zns:Mn phosphor powder, bonded in an organic dielectric binder, can be provided with increased useful lives by incorporating (1) silver in the copper sulfide coating on the ZnS:Mn phosphor powder, in an amount of 2 to 12%, by weight of the copper in the copper sulfide coating; and (2) elemental sulfur in the dielectric binder, in an amount of 0.1 to 3%, by weight of the phosphor particles. The additives can be used independently or together, preferably together. Methods of incorporating the additives are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.