Glass panel and a cathode ray tube including the same
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United States of America Patent
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-
Oct 9, 2007
Grant Date -
Jan 5, 2006
app pub date -
Jun 30, 2005
filing date -
Jul 2, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A glass panel for use in a cathode ray tube includes a face portion for displaying images; a skirt portion extending from a periphery of the face portion backwards; and a blend radius portion for connecting the face portion and the skirt portion. The face portion is provided with an effective screen and a wedge portion positioned near a periphery portion of the effective screen. Compressive stress layers are formed on any regions of an inside and an outside surface of the face portion and the skirt portion, and a maximum compressive stress value .sigma.Fmax of the face portion and a minimum compressive stress value .sigma.Smin of the skirt portion satisfy a relationship of .sigma.Smin/.sigma.Fmax<0.5.
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