Electron gun for cathode-ray tube with improved beam shaping region
US7486009B2 · kind B2 · utility
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6References
5Claims
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Key dates
| Filing date | Mar 18, 2005 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | May 29, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/484
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrode gun for a cathode-ray tube, including at least a first electrode and a second electrode for shaping and focusing the electron beam emitted by a cathode is described. These electrodes are made of a non-oxidizing alloy whose coefficient of expansion between 20° C. and 300° C. lies between 4×10−6/° C. and 13×10−6/° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.