Cathode ray tube
US6011349A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1998 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Mar 5, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/966
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To provide a cathode ray tube stabilizing the potential at an inner wall of a neck, providing stabilized nocking effect by forced discharge among electrodes or the like, promoting the withstand voltage characteristic of an electron gun and preventing deterioration in image quality resulted from straying leakage current, an electron gun where both ends of metal lines are welded to an intermediate electrode and a focus electrode (5-1-th electrode) to surround beading glass and a voltage dividing resistor, is sealed in a neck portion and thereafter, the metal lines are heated by high frequency heating by which a metal film is formed on surfaces of an inner wall of the neck and the voltage dividing resistor and the beading glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.