Color cathode-ray tube with intermediate electrode
US6016030A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1997 |
| Grant date | Jan 18, 2000 |
| Priority date | — |
| Expiry date | Mar 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/966
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To propose a color cathode-ray tube which increases the degree of freedom in designing its main electron lens, decreases the electron beam spot diameter, and achieves high resolution, in which between the focusing electrode (15) applied with the focusing voltage (Vf) and the anode electrode (17) applied with the anode voltage (Va), there is provided the intermediate electrode (16) applied with the potential Vm which is higher than the focusing voltage (Vf) and lower than the anode voltage (Va), and the focusing electrode (15), the anode electrode (17) and the intermediate electrode (16) are respectively formed of cylindrical bodies each having an ellipse cross-section and closed by the electric field correcting electrode plates (25, 26, 27, 28) having three electron beam penetrating portions bored therethrough so as to be arrayed in an in-line fashion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.