Cathode-ray tube
US6528935B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2000 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Mar 7, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/862
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cathode-ray tube in which an outer surface of a face portion is substantially flat, an inner surface of the face portion is a curved surface convex to the outer surface, and when the axis extending approximately in parallel to a long side through the center of the inner surface is X-axis, the axis extending approximately in parallel to a short side through the center of the inner surface is Y-axis, the radius of curvature of the inner surface along the X-axis is Rx, the radius of curvature of the inner surface along the Y-axis is Ry, the radius of curvature of the inner surface along a long side of a phosphor screen is Rt, the length of a long side of the phosphor screen is H, and the length of a short side of the phosphor screen is V, the following inequalities are satisfied:1.2H1.3923<Rx<3.00H1.4284,  (1)1.2H1.3923<Rt<3.00H1.4284,  (2)and3.0V1.4670<Ry<6.67V1.5453.  (3)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.