Electronic CRT centering alignment apparatus

Details Electronic CRT centering alignment apparatus Electronic CRT centering alignment apparatus

1989-12-13

1990-08-28

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358139, H01J 2970, H04N 1700

Patent

active

049528513

ABSTRACT:
An electronic CRT centering alignment apparatus is disclosed. The apparatus includes a pair of zero crossing detectors, one sensing CRT horizontal deflection current, the other sensing CRT vertical deflection current. The zero crossing detectors are employed by the apparatus to generate video signals to mark the center of deflection of the CRT and to delineate the horizontal and vertical axes of deflection.

REFERENCES:
patent: 4282461 (1981-08-01), Simon et al.

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