Glass bulb for a cathode ray tube and cathode ray tube
US6812631B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 2002 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Dec 31, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/861
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A glass bulb for a cathode ray tube includes a panel and a funnel sealed to each other at respective seal edge portions to form a sealing portion. The panel includes a face portion with a substantially rectangular screen, and a skirt portion constituting a sidewall of the face portion and having a seal edge portion at its end. The funnel is connected to a cylindrical neck portion for housing an electron gun. A distance H from the center of the inner surface of the face portion to a point where a reference line of the funnel crosses the bulb's central axis, and the diagonal length D of the screen, satisfy D/H≧3.3. A bent portion bending towards the bulb's central axis is provided at least on a long side of the sealing portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.