Raster left-and-right distortions correcting apparatus

Details Raster left-and-right distortions correcting apparatus Raster left-and-right distortions correcting apparatus

1994-01-03

1995-07-18

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315408, 315411, G09G 104, H01J 2970

Patent

active

054344840

ABSTRACT:
Disclosed herein is a raster left-and-right distortions correcting apparatus for correcting left and right distortions of a raster. According to the raster left-and-right distortions correcting apparatus, parameters for correcting the left and right distortions peculiar to a CRT of the raster left-and-right distortions correcting apparatus are stored in an E.sup.2 PROM. The parameters are then electrically processed by a DSP. Thereafter, an analog voltage obtained by D-A converting the result of processing is supplied to a comparator. The comparator compares the analog voltage with a sawtooth wave voltage synchronized with a horizontal synchronizing signal. A switch is controlled depending on the width of a pulse on the basis of the result of comparison to thereby switch a power source for a horizontal output circuit.

REFERENCES:
patent: 4063134 (1977-12-01), Idia
patent: 4956586 (1990-09-01), Gipson et al.
patent: 4956587 (1990-09-01), Kitou
patent: 5276604 (1994-01-01), Messman

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