The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 1990
Filed:
Feb. 11, 1988
Applicant:
Inventors:
Jean-Pierre Fourche, Dijon, FR;
Guy Legrand, Ruff les Echirey, FR;
Michel Faivre, Dijon, FR;
Olivier Berthaut, Dijon, FR;
Assignee:
Videocolor, Montrouge, FR;
Primary Examiner:
Int. Cl.
CPC ...
H01T / ; H01J / ;
U.S. Cl.
CPC ...
445-3 ; 445 63 ; 445 64 ; 335212 ; 358 10 ;
Abstract
For the automatic determining of the characteristics of the corrections to be made in trichromatic cathode tube deflectors, measurements are made of the coordinates of the midpoints of the bars R and B of a crossed bar test pattern at 'strategic' places. With the deflector in the 'mean' position on the tube, the values obtained are standardized by computation to re-establish virtually the ideal position of the deflector, the convergence errors due to this deflector are computed and the pinpoint or overall corrections to be made to it are deduced therefrom.