Method for driving projection cathode ray tube
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United States of America Patent
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-
Apr 15, 2003
Grant Date -
N/A
app pub date -
May 17, 1999
filing date -
May 18, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a projection CRT, an image of high brightness is displayed on a screen as an electron beam emitted from an electron gun is scanned according to an image driving signal. The image is magnified and projected through a lens unit. Here, voltage of a direct current component of the image driving signal is lower than threshold voltage of the screen for scan time and also lower than threshold voltage of the electron gun for retrace time.
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