Data signal lines are provided to pixel arrays such that adjacent first and second pixel arrays (α, β) and including plural pixels are provided with two data signal lines each. Each pixel includes a pixel electrode (17a). The two scanning signal lines (16a, 16b) are selected concurrently. Respective pixel electrodes (17a, 17b) for pixels (101, 102) are connected with a data signal line (15x) and a data signal line (15y), respectively. Input gray scales of data signals inputted to the display device externally is corrected such that if input gray scales of data signals to be supplied respectively to the pixel electrodes (17a, 17b) are different from each other, the input gray scales are corrected to cause a gray scale difference between post-correction gray scales to be greater than that between the input gray scales. Display is carried out with the post-correction gray scales.