Color cathode ray-tube with electron gun having a reinforcing electrode
US6239546A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1998 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Oct 28, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/488
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A reinforcing electrode plate having at least one electron-beam through-hole that passes an electron beam is connected to at least one of a focusing electrode and a final accelerating electrode at its opening portion. Supporting portions of the reinforcing electrode plate are formed so as to project further outside than the opening portion or the peripheral face of the electrode, thus fixing the reinforcing electrode plate to an insulating support. Therefore, the deformation of the focusing electrode or the final accelerating electrode that occurs in assembling a main lens of an electron gun used for a color cathode-ray tube is prevented, thus decreasing the variation in property of the electron gun. Additionally, by adjusting the shape or the like of an opening through which an electron beam passes in the reinforcing electrode plate, a focusing power of the main lens can be adjusted in the horizontal direction and in the vertical direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.