CRT monitor with elimination of unwanted time variable electric

Details CRT monitor with elimination of unwanted time variable electric CRT monitor with elimination of unwanted time variable electric

1992-07-02

1993-03-30

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 8, 315 85, 313479, 335214, G09G 104, H01J 2906, H01J 3100, H01H 100

Patent

active

051987295

ABSTRACT:
Unwanted electric fields in the area in front of a CRT can be produced by flyback voltage pulses which occur across the horizontal deflection coils and are coupled to the inner DAG coating of the CRT. The unwanted fields can be eliminated by providing voltage pulses equal and opposite to the causative voltage pulses and applying the provided voltage pulses to the inner coating and the anode button, leaving no fields to be cancelled in the relevant area.

REFERENCES:
patent: 4996461 (1991-02-01), Bentley
patent: 5025490 (1991-06-01), Tamura
Cappels, "Cancellation of ELF/VLF Electric Fields from CRT Displays" SID Digest 1992 pp. 137-140.

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