Circuit for generating signal for correcting deflection of elect

Details Circuit for generating signal for correcting deflection of elect Circuit for generating signal for correcting deflection of elect

1984-02-08

1985-10-22

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358 60, H01J 2956

Patent

active

045491178

ABSTRACT:
A circuit for generating a signal for correcting deflection of electron beam, which circuit is advantageously used as, for example, a circuit for correcting registration in a multi-tube type color television camera. In the correction signal generating circuit, quantities of corrections at intersections defined by a plurality of lines extending in horizontal and vertical directions so as to divide a surface scanned by the electron beam into a plurality of areas are stored in terms of digital values. The digital signal read out from the memory is converted into an analog signal. The analog signal is then supplied to low-pass filter means. From the output signal of the low-pass filter means, quantities of correction are prepared for the scanning lines present between the two intersections located adjacent to each other in the vertical direction. In the circuit, the shading is positively prevented from occurring.

REFERENCES:
patent: 4203054 (1980-05-01), Sowter
patent: 4318032 (1982-03-01), Kureha
patent: 4395662 (1983-07-01), Sexton, Jr.
patent: 4401922 (1983-08-01), Kamata et al.
patent: 4422019 (1983-12-01), Meyer

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