Independent top/bottom raster correction

Details Independent top/bottom raster correction Independent top/bottom raster correction

1987-12-30

1989-07-04

Tarcza, Thomas H.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2956

Patent

active

048454095

ABSTRACT:
Top and bottom pincushion correction signals with separately controllable first and second order components are provided. A switching signal, developed from the vertical ramp, operates a plurality of switches for selectively applying the top and bottom correction signals to the carrier input of a multiplier. A trapezoidal correction signal is also applied to this multiplier input. The modulator input of the multiplier is supplied with the vertical ramp. A parallellogram correction pulse is combined with the output of the multiplier. The resultant, generally bow tie-shaped, raster correction signal is applied to the vertical deflection means.

REFERENCES:
patent: 4063134 (1977-12-01), Iida
patent: 4395662 (1983-07-01), Sexton, Jr.
patent: 4422020 (1983-12-01), Lehnert et al.
patent: 4482846 (1984-11-01), Worster
patent: 4496882 (1985-01-01), Oliver et al.
patent: 4642530 (1987-02-01), Rodriguez-Cavazos
patent: 4654564 (1987-03-01), Lehnert
patent: 4682085 (1987-07-01), Haferl et al.
patent: 4687973 (1987-08-01), Holmes et al.
patent: 4733140 (1988-03-01), Oliver

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