Color display device comprising a color display tube and a delay

Details Color display device comprising a color display tube and a delay Color display device comprising a color display tube and a delay

1995-10-04

1996-09-24

Pascal, Robert

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Pulse storing

315 85, 361150, H01J 2906

Patent

active

055594018

ABSTRACT:
Color display tube with a shadow mask, a shield of a ferromagnetic material and a demagnetizing device having a set of demagnetizing coils. The demagnetizing device is provided with means for energizing the demagnetizing coils in two steps which are shifted in time with respect to each other, while the location of the turns of the demagnetizing coils is such that upon the passage of current through only the one coil, the magnetic field generated by the coil is capable of demagnetizing those parts of color selection electrode and screen which are not demagnetized upon the passage of current through only the other coil, and conversely.

REFERENCES:
patent: 3965386 (1976-06-01), Duistermaat et al.
patent: 5499156 (1996-03-01), Bentley
Blaha "Degaussing Circuits For Color Television Receivers" IEEE Transaction Broadcast & Telev. Receivers vol. BTR18 No. 1 Feb. 1972.

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