Phosphorescent material
US5723224A · kind A · utility
4Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Apr 12, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1266
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A phosphorescent material has an excellent life time characteristic when it is applied to display device such as a fluorescent display device and includes a body portion composed of alkali metal and an oxide, and a protective coat formed over a surface of the body portion. The protective coat is composed of an oxide containing at least one element selected from the group consisting of Al, Ti, Si, Zn, Sn, Bi, Sb, Ce, Y, Ta, Gd, Ru and Ga.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.