Cathode-ray tube apparatus
US7355331B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2005 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Jun 12, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/861
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a cross-section including a tube axis, assuming that T1 represents a thickness of a funnel at a point on an outer circumferential surface of the funnel, which is placed at the same position in a tube axis direction as that of an end of a horizontal deflection coil on a phosphor screen side, and T2 represents a thickness of the funnel at a point on the outer circumferential surface of the funnel, which is placed at the same position in the tube axis direction as a position 7 mm away from the end of the horizontal deflection coil on the phosphor screen side to the phosphor screen side along the tube axis, the funnel includes at least one cross-section including the tube axis satisfying a relationship: T2/T1≧1.18. Owing to this, cone halation can be prevented while an X-ray leakage amount is limited to a predetermined value or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.