Color cathode ray tube and display device with reduced moire
US5619094A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1995 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Sep 26, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/076
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
By selecting the number of apertures in the shadow mask of a color cathode ray tube system to be such that the s/a.sub.v ratio, where s is the scan pitch for the entire frame and a.sub.v is the vertical mask pitch, is between 5.8/8 and 6.4/8 (5.8/8.ltoreq.s/a.sub.v .ltoreq.6.4/8) or between 9.4/8 and 10.6/8 where the lines are progressively scanned or, where the lines are scanned in an interlace mode with a frequency higher than 70 Hz, the s/a.sub.v ratio is between 5.8/8 and 6.4/8 (5.8/8.ltoreq.s/a.sub.v .ltoreq.6.4/8) or between 9.4/8 and 10.6/8, a cathode ray tube system is provided with a reduced occurence of disturbing Moire effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.