Bi-directional scan circuit
US5349274A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1993 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | May 21, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a dual direction horizontal bi-directional scan circuit, deterioration of the picture quality is prevented, while linearity is improved without supplying wasteful deflecting current, and pin distortion is corrected. The deflecting current in the going scan and in the returning scan are supplied to each deflecting coil by first and second resonance circuits, and capacitors substantially the same in capacitance are provided in the first and second resonance circuits to bias the deflecting voltage so that the terminal voltage and the power source voltage of the capacitors are synchronized to the vertical synchronizing signals to produce a parabolic modulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.