Cathode-ray tube apparatus
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United States of America Patent
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N/A
Issued Date -
Aug 9, 2007
app pub date -
Jan 9, 2007
filing date -
Feb 8, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A pair of coma coils for correcting a VCR that is a positional displacement in a vertical axis direction of a center electron beam with respect to the center of a pair of side electron beams on a vertical axis in upper and lower portions on a screen are provided at a position in the vicinity of an end of a deflection yoke on an electron gun side. Assuming that a maximum value of the intensity of a vertical deflection magnetic field on a tube axis is H.sub.MAX, and the intensity of a vertical deflection magnetic field on the tube axis at the position where the pair of coma coils are arranged in the tube axis direction is H.sub.C, H.sub.C/H.sub.MAX.gtoreq.0.8 is satisfied. Owing to this, high-order distortion of horizontal lines on a screen can be corrected.
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