Focusing electrode in electron gun for color cathode ray tube
US6094004A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1998 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Apr 1, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/624
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Focusing electrode in an electron gun for a color cathode ray tube, is disclosed, which can reduce a man-power and a number of components in a fabrication of the electron gun and can prevent a center electron beam from being elongated horizontally depending on a fitted depth of an inner guide electrode, the focusing electrode including a first focusing electrode adapted to be applied of a low static voltage and having a face with three vertically elongated electron beam pass-through holes of a key hole type and an inner guide electrode with three electron beam passthrough holes disposed at an inner side of the face, and a second focusing electrode adapted to be applied of a high dynamic voltage and having correcting electrodes unitary with a face of the second focusing electrode opposite to the first focusing electrode formed in a cathode direction at upper and lower sides of each of the three electron beam pass-through holes, whereby facilitating changes of center and side powers of the dynamic quadrupole lenses formed between the electron beam pass-through holes/the inner guide electrode in the first focusing electrode and the correcting electrodes on application of the dynamic v…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.