DEVICE FOR AUTOMATIC PROTECTION OF COLOR PICTURE TUBE FROM MAGNETIC FIELDS Russian patent published in 1995 - IPC

Abstract RU 2039421 C1

FIELD: cathode-ray tubes. SUBSTANCE: device has reversal magnetization circuit 5 having two orthogonal pairs of reversal magnetization coils 3 and 4 which are mounted near faces of picture tube mask. In addition device has tuning unit 2. Reversal magnetization coils 3 and 4 in each pair are connected in series aiding. Tuning unit 2 provides power supply of two pairs of reversal magnetization coils 3 and 4 by alternating smoothly decayed electric currents which are shifted in phase in quarter. EFFECT: decreased influence of outer magnetic fields on picture quality on tube screen. 5 dwg

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RU 2 039 421 C1

Authors

Tsyrul'Nikov B.N.

Dates

1995-07-09—Published

1991-09-02—Filed