| 摘要 |
PURPOSE:To make the correction of bilateral symmetry possible by supplying the pulses of the same frequency with resonance frequency of a resonance circuit to a horizontal winding. CONSTITUTION:Horizontal period pulse (l) is converted to the pulse string of horizontal synchronism 1/2, that is, the pulse (m) of double repetitive frequency by a frequency multiplying circuit 10 that constitutes a frequency adjusting means from, for instance, a fly-back transformer etc., and applied to the horizontal winding 5a of an upper and lower bobbin distortion correcting transformer. The frequency of applied pulse (m) outputted from the frequency multiplying circuit 10 nearly coincides with a horizontal secondary resonance frequency formed by a vertical winding 5b, a phase adjusting coil 6 and a resonance capacitor 7. Accordingly, a raster distortion correcting current (n) free from attenuation can be obtained. Thus, the attenuation of generated current of the resonance circuit is reduced, and the correction of bilateral symmetry can be obtained. |
