Patent ID: 8004543

Claim:
An image processing apparatus comprising: a display unit which displays an image on a screen based on an input image signal; a scaler which scales the image signal to control a display size of the image displayed on the screen; and a controller which controls the scaler to change the display size of the displayed image at a predetermined interval of time while the image is being displayed on the screen, wherein the scaler applies a first scale factor to the image signal to change the display size of the displayed image to a first display size, when the first scale factor is applied to the image signal, the controller starts a counter and determines whether the predetermined interval of time has lapsed based on the counter, and when the controller determines that the predetermined interval of time has lapsed while the first scale factor is set, the controller controls the scaler to apply a second scale factor to the image signal to change the display size of the displayed image from the first display size to a second display size, and wherein the controller controls the scaler so that the display size of the image is symmetrically changed from a center line of the image such that the display size of the image is symmetrically changed by moving both a first boundary of the image and a second boundary of the image, located on an opposite side of the image, further from or closer to the center line such that the first boundary and the second boundary are equally extended from or retracted toward the center line according to the scaler, and wherein a third boundary and a fourth boundary of the image remain stationary while the first boundary and the second boundary are moved.