Color display tube having a non-circular neck portion
US6545404B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 2001 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Apr 24, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/8606
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a color display tube including an envelope including a front panel and a funnel, and an electron gun provided in a neck portion of the funnel, a horizontal outer diameter of the neck portion in a region on a rear end side is greater than a vertical outer diameter thereof in this region and a horizontal outer diameter thereof in a region on the front panel side, and a main lens of the electron gun is formed in the region on the rear end side. With this configuration, it is possible to achieve both an electric power saving and a high resolution in a display screen in a color display tube device, as well as to mount a deflection yoke in the color display tube easily.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.