Process and device for convergence measurement in a color pictur

Details Process and device for convergence measurement in a color pictur Process and device for convergence measurement in a color pictur

1993-06-08

1995-04-04

Kostak, Victor R.

Television

Monitoring, testing, or measuring

Test signal generator

348188, H04N 1700, H04N 1702

Patent

active

054041643

ABSTRACT:
A color TV convergence measurement device and process for measuring a position of an electron beam of a multiple-beam color picture tube relative to a field of view of an image converter, in which an electron beam generation system provides the electron beam which generates a brightness distribution pattern on a screen of a tube, the screen has phosphor stripes for different colors, and a shadow mask is arranged in front of the screen and has elongated slots in the direction of the phosphor stripes. The process includes generating a predefined electron distribution pattern on the shadow mask; recording an associated brightness distribution pattern on the screen using the image converter which converts the brightness distribution pattern into an electrical charge pattern; and analyzing the charge pattern to obtain a value for a variable characterizing the position of the charge pattern within the field of view of the image converter; generating the electron distribution pattern with dimensions on an order of a few millimeters and with at least one edge extending obliquely to the direction of elongation of the mask slots; and generating the associated brightness distribution pattern on the image converter so that it fits completely into the field of view.

REFERENCES:
patent: 4093960 (1978-06-01), Estes
patent: 4628342 (1986-12-01), Desmons et al.
Prospects of the Company, "Innovationstechnik, Brenden".

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