In-line type electron gun for color cathode ray tube
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United States of America Patent
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-
Sep 19, 1995
Grant Date -
N/A
app pub date -
Nov 25, 1992
filing date -
Dec 6, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electron gun for use in a color picture tube which can reduce the astigmatism of main electron lenses and to make small circular beam spots. The electron gun has three cathodes each injecting an electron beam respectively and main electron lenses which concentrate the three electron beams onto a fluorescent screen, wherein a third electrode and a fourth electrode consisting the main electron lenses are formed by two large apertured electrodes facing each other and two small apertured electrodes each having three apertures for correcting the astigmatism.
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