Color picture tube having an internal magnetic shield
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United States of America Patent
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-
Jan 14, 1992
Grant Date -
N/A
app pub date -
Sep 11, 1990
filing date -
Sep 11, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A color picture tube includes a faceplate and a funnel attached to the faceplate. The faceplate has a horizontal dimension M.sub.h and a vertical dimension M.sub.v, with the dimensions having a ratio M.sub.h /M.sub.v greater than one. A magnetic shield is located within the tube. The magnetic shield has a front aperture in the proximity of the faceplate and a rear aperture remote from the faceplate. The front aperture has a horizontal dimension F.sub.h and a vertical dimension F.sub.v and the rear aperture has a horizontal dimension R.sub.h and a vertical dimension R.sub.v. The top and bottom of the rear aperature are close to the sides of the funnel and the sides of the rear aperture are spaced from the funnel by a spacing consistent with the entrance of the electron beams at maximum deflection into the shield.
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