Absorbing inhomogeneous film for high contrast display devices
US4132919A · kind A · utility
17Cited by
12References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1977 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Dec 12, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/913
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to light absorbing inhomogeneous films and their use in luminescent display devices such as cathode ray tubes and electroluminescent panels to achieve high contrast ratio and minimal halation effect, and more particularly to an inhomogeneous film having a composition varying continuously from metal oxide to metal, and the method of making same. The metal is selected from the group consisting of tantalum and vanadium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.