Sensor system for television picture tubes

Details Sensor system for television picture tubes Sensor system for television picture tubes

1984-08-03

1986-11-25

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358 10, 358 69, H01J 2956, H04N 1702

Patent

active

046251537

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.

REFERENCES:
patent: 3939486 (1976-02-01), Tomii
patent: 4181398 (1980-01-01), Sick

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