Method for the automatic measurement of convergence and for the

Details Method for the automatic measurement of convergence and for the Method for the automatic measurement of convergence and for the

1988-02-11

1990-05-15

Rowan, Kurt

Electric lamp or space discharge component or device manufacturi

Process

With testing or adjusting

445 63, 445 64, 335212, 358 10, H01T 2106, H01J 918

Patent

active

049254200

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.

REFERENCES:
patent: 3844006 (1974-10-01), McGlashan
patent: 4163308 (1979-08-01), Tawa et al.
patent: 4172309 (1979-10-01), Chiodi
patent: 4405950 (1983-09-01), Wardell, Jr.
patent: 4515568 (1985-05-01), Cormio
patent: 4606729 (1986-08-01), Kuiper
L'Onde Electrique, vol. 48, No. 499, Oct. 1968, pp. 894-897, Paris, FR; J. -C. Stern: "Contribution aux Measures Objectives de Convergence sur Tube Cathodique Trichrome a Masque Perfore".

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