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:
Apr. 04, 1995
Filed:
Jun. 08, 1993
Nokia Technology GmbH, Pforzheim, DE;
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.