Color cathode ray tube having an improved electron gun
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United States of America Patent
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-
May 4, 2004
Grant Date -
Jun 20, 2002
app pub date -
Feb 13, 2002
filing date -
Oct 30, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A color cathode ray tube having at least an electron gun, constituted by a cathode for forming a plurality of electron beams arranged in-line, and a focusing electrode and an anode constituting a main lens for focusing and accelerating the electron beams and a fluorescent screen. The focusing electrode includes at least a first division electrode and a second division electrode arranged with a gap for controlling a scanning speed of the electron beams in common. The second division electrode is opposed to the anode and has, in an opposed surface thereof, a single opening for passing the plurality of electron beams in common. A length of the first division electrode in the axial direction of the tube is longer than a length of the second division electrode in the axial direction of the tube.
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