Convergence apparatus with variably magnetized magnets

Details Convergence apparatus with variably magnetized magnets Convergence apparatus with variably magnetized magnets

1977-06-21

1978-09-12

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335210, H01F 700

Patent

active

041141245

ABSTRACT:
A convergence apparatus having a pair of four-pole static magnets and a pair of six-pole static magnets mounted rotatably at the neck portion of an in-line color CRT having three electron guns arranged laterally in a single file such that the pair of four-pole static magnets and a pair of six-pole static magnets are arranged in the axial direction of the neck portion. The magnetization density of the N poles and that of the S poles of at least one of the pairs of four-pole magnets and six-pole magnets are made to be different, and further the magnetization density of the two sheets of the static convergence magnets of which the magnetization density of the N poles and that of the S poles are different are made to be different, and thereby more certain and complete correction can be attained.

REFERENCES:
patent: 3290534 (1966-12-01), Kratz
patent: 3725831 (1973-04-01), Barbin
patent: 3808570 (1974-04-01), Thompson et al.

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