Cathode-ray tube with interference filter and projection television system employing same
US5057912A · kind A · utility
2Cited by
7References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Jul 10, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A projection television system comprising a cathode-ray tube having a face plate, a display screen coated with a phosphor of the type ZnS:Ag and an interference filter arranged between the display screen and the face plate. The ZnS:Ag has an admixture which slightly increases the y-coordinate of the light emitted by the phosphor. This enables an increased maximum luminance in the white-D-point without the y-coordinate of the light emitted by the cathode-ray tube becoming too low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.