Computer-aided process for placement of CRT trim magnets

Details Computer-aided process for placement of CRT trim magnets Computer-aided process for placement of CRT trim magnets

1990-05-29

1992-09-08

Lall, Parshotam S.

Boots, shoes, and leggings

364468, 364552, 31536824, 358242, H01J 944, H01J 2970

Patent

active

051464110

ABSTRACT:
A computer-aided process for calculating the orientation and strength of trim magnetic fields for a monochrome CRT uses a machine vision camera to establish the shape of the uncorrected raster. Using the distortion information and sensitivity mappings representing the effect of a single trim magnet on a raster, a linear optimization technique is employed to compute the strength and orientation of each magnetic field which must be used to correct for raster distortions.

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