Static convergence device for colour television display tube

Details Static convergence device for colour television display tube Static convergence device for colour television display tube

H - Electricity

01

J

313/35.1202

H01J 29/70 (2006.01)

Patent

CA 1075298

ABSTRACT In a colour television display tube, an air gapped permanent magnet ring is mounted on the electron gun in the tube neck and magnetized from outside the tube to provide a multipole magnetic field for correction of static misconvergence. The magnet material has average values of coercive field strength of 5 to 40 kA/m and average values of remanent induction of 500 to 1500 milli-telsa. - 14 -

273881

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