Shadow mask for cathode ray tube having an aperture area in which a curvature of radii in the horizontal and vertical directions satisfy a particular condition
US7105993B2 · kind B2 · utility
0Cited by
7References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 28, 2003 |
| Grant date | Sep 12, 2006 |
| Priority date | — |
| Expiry date | Feb 19, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/0794
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A shadow mask for a cathode ray tube includes an aperture area having a plurality of apertures passing electron beams, a non-aperture area extending a predetermined distance from a circumference of the aperture area and a skirt extending a predetermined distance from an outside circumference of the non-aperture area and bent at a predetermined angle to the non-aperture area, wherein the aperture area has predetermined curvature radii, and wherein if a curvature radius in a horizontal direction of the aperture area is Rhs, and a curvature radius in a vertical direction is Rvs, the following condition is satisfied,0.6<Rvs/Rhs<0.8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.