Cathode ray tube
US6806633B2 · kind B2 · utility
0Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2002 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | May 13, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inner magnetic shield is provided that reduces mislanding lengths due to electron beam distortion caused by external magnetic fields such as terrestrial magnetism, thereby reducing the occurrence of drifted or uneven color throughout an entire display screen. The inner magnetic shield is of a tube with a plurality of side surfaces, and is provided with at least one skirt (37) that extends to the vicinity of a spanning member (41) at a location where the inner magnetic shield is not in contact with a holding member (42). The skirt (37) is magnetically coupled with the spanning member (42).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.