| 摘要 |
A color cathode ray tube display device comprises a color cathode ray tube including a neck portion (1a), a funnel portion (1b), and a panel portion (1c), a compensating coil (7) which generates a compensating magnetic field for eliminating the influence of an external magnetic field that acts vertically on electron beams which will intersect a display screen of the color cathode ray tube (1), a current supply unit (4,5) for passing a sawtooth current synchronized with the vertical deflection cycle of a video signal into the compensating coil (7) so that the compensating coil generates the compensating magnetic field, and a memory (5b) for storing information about the sawtooth current passing through the compensating coil (7).
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