Patent ID: 6989872
Filing Date: 2006-01-24
Classification: H04N

Abstract:
1. An image distortion correcting apparatus for correcting distortion in an image displayed on a screen on the basis of a video signal, comprising: a storage device for storing the video signal; a write clock signal generation circuit for generating a write clock signal for writing an inputted video signal into said storage device; a read clock signal generation circuit for generating a read clock signal for reading out the video signal stored in said storage device; a distortion correction waveform generation circuit for generating a distortion correction waveform for correcting the distortion in the image by shifting the positions of pixels displayed on the screen on the basis of the video signal; and a read clock signal control circuit for controlling the frequency of the read clock signal generated by said read clock signal generation circuit on the basis of said distortion correction waveform generated by said distortion correction waveform generation circuit, said distortion correction waveform generation circuit setting said distortion correction waveform such that the amount of shift of the pixel reaches zero at both ends and the center of the image in the horizontal scanning direction.