Color cathode-ray tube and method for producing the same
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United States of America Patent
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-
Jan 1, 2008
Grant Date -
Apr 13, 2006
app pub date -
Oct 11, 2005
filing date -
Oct 12, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A conductive film isolated from an inner conductive film is formed on an inner wall of a neck. Assuming that, among a plurality of focusing electrodes constituting an electron gun, a position in a tube axis direction of an end on an anode side of an anode-side focusing electrode placed at a position closest to the anode side is P0; among electrodes supplied with substantially the same voltage as that of the anode-side focusing electrode and arranged continuously from the anode-side focusing electrode, a position in the tube axis direction of an end on a beam generating portion side of an electrode placed at a position closest to the beam generating portion side is P1; in the tube axis direction, a position of an end on the beam generating portion side of the conductive film is PL1 and a position of an end on the panel side of the conductive film is PL2, the position P0 is placed between the position PL1 and the position PL2. Assuming that the distances from the position P0 to the positions PL1, PL2, P1 are L1, L2, L3, respectively, relationships: L1>L2 and L1
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