Geometric error compensation circuit of color television camera

Details Geometric error compensation circuit of color television camera Geometric error compensation circuit of color television camera

1987-09-16

1990-01-09

Tarcza, Thomas H.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315370, H01J 2956

Patent

active

048930652

ABSTRACT:
For the purpose of compensating for geometric errors at four corners of a color picture there are provided a circuit for separating a vertical scanning saw tooth shaped signal into first and second signals corresponding to fore and rear portions of a vertical scanning period, first and second balanced modulators respectively modulating a horizontal scanning saw tooth shaped signal in accordance with the separate first and second signals, circuits for separating the outputs of the modulators in accordance with their reference levels, and circuits for generating geometric error compensation outputs corresponding to specific portions in the horizontal and vertical directions of the scanned picture.

REFERENCES:
patent: 4337419 (1982-06-01), Holzgrafe
Japanese Patent Laid-open 57-11588 Inventors: Noma, Yoshimura Filed: Jun. 25, 1980.

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