Alignment apparatus for electron beam tube
AssigneeSony Corporation
InventorsSusumu Tagawa, Mizuomi Inoue
Life of this patent
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Abstract
Means for aligning the electron beam of an electron beam in a cathode ray tube so as to adjust the alignment and which includes a rear bobbin portion surrounding the cathode ray tube and which is mounted at least one cylindrical shaped magnet that is magnetized in the direction of a diameter of the cylinder and which can be rotated so as to correct for misalignment in the tube. In one embodiment, two rotatable magnets mounted at right angles relative to each other are utilized and in the second embodiment a single magnet can be utilized and in which the supporting bobbin in which the magnet is mounted can be rotated by 180.degree. is provided.
Claims12
An alignment apparatus for an electron beam of a cathode ray tube having an electron gun therein comprising, a magnetic band shield surrounding the outside of said tube, and at least one cylindrical-shaped magnet located between said shield and said tube and mounted for rotation on an axis parallel to the axis of said tube, whereby a magnetic field within said tube can be controlled by rotating said magnet around its axis to compensate for undesired magnetic deflection of the electron beam.
Dependencies are inferred from the claim text.