| 摘要 |
PURPOSE:To improve correctability by selecting the correction amount adjusting voltages of correction zones and superposing the integrals of these integrated voltages on the parabolic wave voltage. CONSTITUTION:By an horizontal drive signal supplied from a horizontal drive circuit to an input terminal 1, a horizontal output transistor Q1 of a horizontal output circuit 2 is switched, the sawtooth current of a horizontal period flows to a deflection coil L2, and the current for high-voltage output flows to a primary winding wire L1 of an output transformer. Based on the vertical deflection current supplied from a vertical output circuit 3 to a deflection coil L4, a vertical sawtooth voltage V1 is supplied to an input terminal 4, Miller integrated by a correcting circuit part 5, and inverse amplified. In this way, a parabolic- wave voltage V2 for left and right pincushion distortion correcting is formed, and supplied through a choke coil L4 to the circuit 2. Then, the modulation of the vertical period is performed on the current which flows through the coil L2 by the voltage V2. Thus, the accurate correction of the left and right pincushion distortion can be performed. |
