Electron guns for color picture tube
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United States of America Patent
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Apr 7, 1998
Grant Date -
N/A
app pub date -
Jul 9, 1997
filing date -
Dec 7, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Electron guns for color picture tube capable of strengthening the refracting action of electrostatic prisms and of overcoming possible distortion of three electron beams at about the periphery of a screen due to strong nonuniform magnetic field are disclosed. The electron guns has variable asymmetric electrostatic lenses, which lenses include first and second focusing electrodes, a first electrostatic deflection electrode mounted to the first focusing electrode, a second electrostatic deflection electrode mounted to the second focusing electrode, and an accelerating electrode placed in front of the second focusing electrode. In another embodiment, the variable asymmetric electrostatic lenses of the electron guns includes electrostatic deflection means placed between the first and second focusing electrodes.
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