Cathode ray tube with auxiliary electrodes having a plurality of slots
US6339285B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 2000 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | Mar 9, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/503
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron gun for a color cathode ray tube includes a triode unit, a main lens unit, and first and second auxiliary electrodes. The triode unit includes plural cathodes arrayed in a first direction and first and second electrodes each having corresponding plural electron beam passing holes corresponding to the respective cathodes. The main lens unit finally focuses and accelerates an electron beam and includes a third electrode forming a pre-focus lens with the second electrode. The first auxiliary electrode is coupled to one side surface of the second electrode facing the first electrode. The second auxiliary electrode is coupled to the other side surface of the second electrode facing the third electrode. With this arrangement, a beam spot of uniform size can be formed on the entire surface of a screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.