A display device includes a multi-primary-color display panel with subpixels arranged in a matrix pattern of columns and rows; and a signal converter arranged to convert a video signal, having values that represent the colors of pixels with a matrix pattern, into a multi-primary-color signal for use in the multi-primary-color display panel. The signal converter associates a value of the video signal representing the color of at least one of pixels on a p.sup.th row with values of the multi-primary-color signal corresponding to the luminances of subpixels on (s-1).sup.th and s.sup.th rows, and also associates a value of the video signal representing the color of at least one of the pixels on a (p+1).sup.th row with values of the multi-primary-color signal corresponding to the luminances of subpixels on s.sup.th and (s+1).sup.th rows.