1. A liquid crystal display device including a liquid crystal drive device for operating liquid crystal according to an input video signal inputted in the liquid crystal display device, comprising: a gray scale conversion section configured to convert a gray scale value of the input video signal to a gray scale value belonging to a high gray scale region, and output the video signal conveying the converted gray scale value to the liquid crystal drive device if the input video signal conveys a gray scale value belonging to a low gray scale region, where receipt of the input video signal at the liquid crystal display devices and the converted gray scale value both correspond to a same frame, and where the low gray scale region is one of two regions into which a range of possible gray scale values are divided, the low gray scale region corresponding to gray scale values that cause the liquid crystal display device to display at low luminance, and the high gray scale region is the other one of the two regions, the high gray scale region corresponding to gray scale values that cause the display device to display at high luminance, the gray scale conversion section converting all gray scale values belonging to the low gray scale region to gray scale values belonging to the high gray scale region, the liquid crystal drive device operating the liquid crystal so that a video image is displayed just by use of the gray scale values belonging to the high gray scale region.