1. An image quality analysis method for a display device, comprising the steps of: outputting an image pattern for analysis of an image quality of the display device; dividing a screen display region to which the image pattern is output into a plurality of sub-regions; producing measurement data representing the image quality with respect to each of the plurality of sub-regions; arranging the produced measurement data as a time series; obtaining a fractal dimension exponent from the data as a time series; and evaluating the fractal dimension exponent as a level of uniformity of the image quality of the display device.