Service switch for video display deflection apparatus
US5220253A · kind A · utility
3Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1992 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Mar 2, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sawtooth signal generator of a D.C. coupled vertical deflection circuit is responsive, during service mode of operation, to a first signal at a D.C. level that is indicative of vertical centering. During the service mode operation, the generation of the sawtooth signal is disabled and, instead, the generator generates a D.C. signal that is D.C. coupled via a vertical deflection amplifier to a vertical deflection winding in a manner to position an electron beam at the vertical center of a display screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.