| 摘要 |
PURPOSE:To handle a high horizontal frequency and to enable excellent right-left focus distortion correction by connecting a parabolic wave application part to a power source and imposing direct modulation on a source voltage with a parabolic wave. CONSTITUTION:In the right-left focus distortion correcting circuit of the CRT monitor device which corrects the right-left focus distortion of a deflecting circuit by using the external parabolic wave, the parabolic wave application part 8A which adds the parabolic wave to a horizontal deflecting current is connected to the power source 1 and the source voltage is modulated directly with the parabolic wave. Namely, the parabolic wave application part 8A imposes parabolic modulation on the source voltage with the parabolic wave. Consequently, the correction accuracy of right-left focus distortion can be improved even by a deflecting high-voltage circuit which employs a specially high horizontal frequency resonance system. |
