Color picture tube with internal funnel shaped magnetic shield
US4229675A · kind A · utility
14Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1978 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | Jun 27, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An in-line stripe type color picture tube comprises an inner magnetic shield member having sufficient shield effect against both individual vertical and horizontal components of the earth magnetism and composite components as well. The inner magnetic shield member prevents unwanted shifts of electron beams to ensure that the positional relationship between a fluorescent screen and landing electron beams may have sufficient tolerances and color blur on the fluorescent screen may be prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.