Image display apparatus with a deflection circuit having functio

Details Image display apparatus with a deflection circuit having functio Image display apparatus with a deflection circuit having functio

1992-04-20

1995-09-05

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315393, 315398, G09G 104, H01J 2972

Patent

active

054481406

ABSTRACT:
A first modulating wave current synchronized with a vertical sync signal and, having the same period as the vertical sync signal, is superposed on a horizontal deflection current caused to flow through a horizontal deflection coil of a CRT, and a second modulating wave current synchronized with a horizontal sync signal and, having the same period as the horizontal sync signal, is superposed on a vertical deflection current caused to flow through a vertical deflection coil of the CRT. The polarity and the amplitude of each of the first and second modulating wave currents are controlled by an adjustment circuit to correct a rotational distortion of a display area with respect to the displayed position of this area.

REFERENCES:
patent: 2574946 (1951-11-01), White
patent: 3379833 (1968-04-01), Hecker et al.
patent: 3803445 (1974-04-01), Wagner
patent: 4198591 (1980-04-01), Ohmori
patent: 4337419 (1982-06-01), Holzgrafe
patent: 4893065 (1990-01-01), Yamanaka
patent: 5077501 (1991-12-01), Hartmann et al.

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