Apparatus and method of reducing varying electrical fields in video display terminals
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United States of America Patent
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Mar 25, 1997
Grant Date -
N/A
app pub date -
Jun 29, 1994
filing date -
Nov 22, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention is concerned with a method and an arrangement relating to visual display units, preferably a picture tube (1), for reducing to a minimum the electrical alternating fields generated by the display unit in the unit surroundings. The visual display unit is provided with a voltage connected part (5) on which undesirable voltage variations occur. These voltage variations are indicated. A signal which is phase inverted in relation to the indicated voltage variations is generated. The generated phase-inverted signal is fed back to the voltage connected part (5), to compensate for the voltage variations.
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