In a dot matrix type display represented by a liquid crystal television receiver, as the use of a large screen display screen size progresses, display non-uniformity becomes significant at some screen position attributed to the combination of the property of display panel with the characteristic of the optical system and the like. According to the present invention, by splitting the display screen and converting the video signal by using the different correction data by the split region, display can be performed with composite correction of the display non-uniformity.