Color cathode ray tube dynamic focus electron gun having elongated beam passing holes for compensating for electron beam distortion
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United States of America Patent
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Dec 24, 2002
Grant Date -
N/A
app pub date -
Jun 17, 1999
filing date -
Dec 11, 1998
priority date (Note) -
Expired
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Abstract
A dynamic focus electron gun for a color cathode ray tube including a cathode, a control electrode and a screen electrode, which constitute a triode, a first focusing electrode having three vertically elongated electron beam through-holes formed through its emitting surface, a second focusing electrode which constitutes a quadrupole lens together with the first focusing electrode and having three circular electron beam through-holes formed through its entering surface facing the emitting surface of the first focusing electrode, and a final accelerating electrode installed adjacent to the second focusing electrode and constituting a main electronic lens together with the second focusing electrode.
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