Monochromatic picture tube
US4485328A · kind A · utility
0Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1982 |
| Grant date | Nov 27, 1984 |
| Priority date | — |
| Expiry date | Apr 20, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A monochromatic picture tube whose faceplate has a transmittance of 17 to 23% is provided. In order to obtain the same transmittance as described above, black di-iron trioxide is coated on phosphor grains to form a phosphor screen on the faceplate. Therefore, a picture on the screen results in contrast without eyestrain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.