Cathode ray tube with improved focusing characteristics
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United States of America Patent
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-
Jan 24, 1995
Grant Date -
N/A
app pub date -
Dec 29, 1992
filing date -
Dec 30, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosure relates to a cathode ray tube formed in the neck portion of a funnel, which comprises an electron gun including a cathode, a control electrode and a screen electrode constituting a triode, and a magnetic substance formed between the cathode and the control electrode to focus the electron beam on the control electrode, so that the electron beam emitted from the cathode ray tube is focused toward an electron beam passing hole of the control electrode to improve the focussing characteristics and current density of the electron beam.
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