Color picture tube
US6411024B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1999 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Feb 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/0716
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A color picture tube for which a light-weight support frame for holding a shadow mask can be used and whose weight can be reduced, and a color picture tube that can be provided without requiring the use of a press mold, and a press machine for producing a shadow mask. The tension applied to the shadow mask is 5-90% of the tension (full tension) that would be applied to the shadow mask to prevent electron beams from arriving at a position that is shifted from a predetermined arrival position on the phosphor screen surface due to the thermal expansion of the shadow mask caused by absorbing thermal energy that is converted from the energy of electron beams when electron beams strike the shadow mask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.