Space-saving cathode ray tube employing a six-pole neck coil
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United States of America Patent
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Oct 15, 2002
Grant Date -
N/A
app pub date -
May 4, 2001
filing date -
May 26, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a cathode ray tube, an electron beam is directed towards a faceplate having an electrode biased at screen potential and is magnetically scanned across the faceplate to impinge upon phosphors thereon to produce light depicting an image. A six-pole coil is disposed proximate the deflection yoke and/or on the tube neck to modify the focus of the red, green and blue electron beams to control focus. An electrode between the tube neck and the faceplate is biased at or above screen potential to deflect electrons over a greater total angle than is obtained from the magnetic deflection.
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