| 摘要 |
A cathode ray tube display device having beam deflection coils (8,10,12,14) and means (44 and 46) for applying to inductive means (58 plus the coils) which includes the beam deflection coils a voltage for causing a ramp current to flow in the coils to produce progressive beam deflection, comprising means (52,54,56) for selectively modifying interconnections between the coils to change the inductance presented to the voltage applying means and thus change the gradient of the ramp current and the rate of beam deflection, said interconnection modifying means being operable to change the number of deflection coils through which said current flows.
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