Patent · US Expired

Deflection circuit for a television receiver using symmetrical deflection

US5600212A · kind A · utility

2Cited by

8References

8Claims

0Family size

Assignee

Deutsche Thomson-Brandt GmbH · DE

Inventors

Gangolf Hirtz · Niedereschach, DE
Bernd Bader · Gaildorf, DE
Yves-Marie M. R. Francois · Dammarie-les-Lys, FR
Bernd Tenconi · Brigachtal, DE
Fritz Ohnemus · Villingen-Schwenningen, DE

Key dates

Filing date	Feb 22, 1993
Grant date	Feb 4, 1997
Priority date	—
Expiry date	Feb 22, 2013

Classification

Technology area (CPC H)Electricity
CPC primaryH01J2229/7037
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A deflection method and circuit for symmetrical horizontal scanning in a television tube utilizes a vertical deflection coil and an auxiliary vertical deflection coil. The vertical deflection coil is energized with a sawtooth vertical scanning current having a first slope during vertical trace to generate a first vertical deflection field. The auxiliary vertical deflection coil is energized with a sawtooth vertical auxiliary current having a line frequency and a second slope during horizontal trace equal but opposite to the first slope of the vertical scanning current to generate a second vertical deflection field. The first and second vertical deflection fields are superimposed in the tube to produce a stepped vertical deflection field.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.