Cathode ray tube having index strip electrode
US3939486A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1974 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Jul 19, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cathode ray tube for use with color image signal processing system, which comprises: an evacuated envelope having a transparent faceplate; an electron gun positioned within the envelope for emitting an electron beam toward the faceplate; a deflection means for deflecting the electron beam so that the electron beam vertically and horizontally scans the faceplate; and an index strip member including a plurality of successively arranged index strips positioned at an upper or lower surface of the faceplate, each of the index strips extending in a direction perpendicular to the horizontal scanning direction of the electron beam, and a pair of start and stop index strips each positioned at one side portion of the faceplate and elongated in parallel with the index strips and in substantially the same extent as that of the vertical deflection of the electron beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.