Patent · US Expired

Sensor system for television picture tubes

US4625153A · kind A · utility

5Cited by

2References

3Claims

0Family size

Assignee

ITT Industries · US

Inventors

Ljubomir Micic · Glückstadt, DE
Rolf D. Burth · Emmendingen, DE
Thomas Fischer · Umkirch, DE
Rainer Schweer · Mengen, DE

Key dates

Filing date	Aug 3, 1984
Grant date	Nov 25, 1986
Priority date	—
Expiry date	Aug 3, 2004

Classification

Technology area (CPC H)Electricity
CPC primaryH04N17/04
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A sensor system is adapted for use in automatically adjusting the deflection system of a television picture tube so as to compensate for pincushion distortion including a rectangular frame disposed along the edge of the screen within the sweep range of the electron beam. The frame comprises a striplike, regular arrangement of alternately transparent and opaque segments. In a first embodiment, a conductive path having an external terminal and shielded from the cathode of the television picture tube at regular intervals by equally large metal areas runs along the edge of the screen. This arrangement is on the inside of the screen. In a second embodiment, an optical-fiber array with at least one light-sensitive detector mounted at at least one corner is used.

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