In-line electron gun for color cathode ray tube with cut away structure on field correcting electrodes
US5883463A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Jun 30, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/4886
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An in-line electron gun for a color cathode ray tube having a main lens comprised of an in-line focusing electrode and accelerating electrode, with which it is possible to easily improve an assembly precision of field-correcting electrode plates provided at the focusing electrode and accelerating electrode and having three through apertures through which the R, G, and B electron beams pass and with which it is possible to easily perform an adjustment of aberration of the main lens. The two side through apertures among the three through apertures formed in the field-correcting electrode plate provided at the focusing electrode and accelerating electrode are formed basically as circular apertures with arc shaped cut-away portions continuous with the outside of the circular apertures and concentric with the circular apertures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.