| 摘要 |
A distortion correcting circuit for correcting vertically asymmetric distortion while achieving reduction in circuit scale and a display apparatus equipped with the circuit are provided. This distortion correcting circuit comprises a comparator circuit 10 which compares an amplitude of an vertical sawtooth wave Vsaw with a reference level Vref which is set to the amplitude of the vertical sawtooth wave corresponding to a center of the screen in a vertical sweeping direction, a multiplier circuit 11 which generates a parabolic wave of the difference between the vertical sawtooth wave and the reference level, a variable gain type amplifier circuit 12 which adjusts the output amplitude of the multiplier circuit 11 and a control circuit 13 which sets a first and second gains of the variable gain type amplifier circuit 12 based upon a result of the comparison in said comparator circuit when a result of the comparison in the comparator circuit 10 represents that the amplitude of the vertical sawtooth wave is lower, and equal to or higher than the reference level, respectively. A distortion correction signal Vsaw is output from the amplifier circuit 12. |
