Fluorescent display tube
US4293793A · kind A · utility
1Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1979 |
| Grant date | Oct 6, 1981 |
| Priority date | — |
| Expiry date | May 7, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J31/15
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In order to suppress the Barkhausen oscillation previously observed in fluorescent display tubes, the electron-stream transmission of the grid electrode is controlled by shielding regions of solid or fine mesh form provided in each of the grid meshes in opposing relationship to the exposed insulating portions of the anode substrate lying within the corresponding set of anode segments, which are arranged in a pattern of substantially figure-of-eight configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.