Electronic CRT centering alignment apparatus
US4952851A · kind A · utility
12Cited by
1References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Dec 13, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/227
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic CRT centering alignment apparatus is disclosed. The apparatus includes a pair of zero crossing detectors, one sensing CRT horizontal deflection current, the other sensing CRT vertical deflection current. The zero crossing detectors are employed by the apparatus to generate video signals to mark the center of deflection of the CRT and to delineate the horizontal and vertical axes of deflection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.