Device for displaying color television images
AssigneeU.S. Philips Corporation
InventorsWillem Meijndert Van Alphen, Piet Gerard Joseph Barten, Johannes Van Den Boogert, Joris Adelbert Maria Nieuwendijk, Jan Gerritsen, Adrianus Hubertus Kantelberg
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Abstract
A color television display tube comprising at least eight correction coils, arranged in one plane about the tube neck, for controlling the static convergence and possibly other aspects such as color purity.
Claims11
A correction circuit for a display tube having a neck portion means for generating three coplanar electron beams, said circuit comprising at least eight static convergence correction coils adapted to be disposed about said neck portion with coplanar axises, and means for adjusting the displacement of the two outer beams in any direction with respect to the center beam and for applying direct current variable in amplitude and polarity to said coils, whereby at least eight variable strength magnetic poles are obtained distributed about the neck in one plane.
Dependencies are inferred from the claim text.