Image display device and image displaying method

摘要

According to an inventive image display device and an image displaying method thereof, a frequency of a synchronizing signal of an image signal is discriminated whether or not it is higher than a preset frequency, the image signal is reduced and outputted based on the discrimination result and an image corresponding to the reduced and outputted image signal is displayed, so that it is possible to reset the frequency of synchronizing signal readily while watching a screen of the display unit even if the synchronizing signal has such high frequency that the image cannot be displayed on the display unit.