| 摘要 |
In a cathode ray tube including a panel provided with a phosphor screen, a funnel integrated with the panel, an electron gun disposed inside the funnel, a magnetic shield ( 1 ) for shielding an electron beam ( 5 ) emitted from the electron gun against an external magnetic field, and a frame ( 2 ) for holding the magnetic shield ( 1 ), the magnetic shield ( 1 ) includes, at a portion to be joined with the frame ( 2 ), a bent portion ( 20 ) bent toward a tube axis side, and a thickness T of the bent portion ( 20 ) at its edge on the tube axis side is 0.08 mm or less. By making the thickness T small, halation that is liable to occur in a cathode ray tube with a large deflection angle can be suppressed because electron beams reflected from an end face ( 11 ) and allowed to reach the screen without being shielded by the frame ( 2 ) are reduced.
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