Patent ID: 8040335

Claim:
A system comprising: an input unit configured to input information to the system; a display having a display area configured to display an image corresponding to image data signals applied thereto, the display being capable of maintaining the image to be displayed after termination of application of the image data signals; an area designation unit configured to designate a part of the display area on the basis of protection area information inputted from the input device, the part of area being overlapped to the display area; and a controller unit configured to receive image data and generating image data signals to be applied to the display, the controller unit being configured to inhibit application of image data signals to the designated part of the display area while applying new image data signals to the display, and to un-designate the designated part of the display area and to allow application of image data signals thereto wherein the controller unit measures a frequency of receiving image data and un-designates the designated part of the display area on the basis of the measured frequency.