Patent ID: 8482499

Claim:
A liquid crystal display device which displays a video signal inputted from a video source on a liquid crystal display unit, comprising: the liquid crystal display unit that is formed by stacking a single first liquid crystal display element and a single or a plurality of second liquid crystal display element(s) for displaying an image, each of the first liquid crystal display element and the second liquid crystal element being formed with a plurality of pixel units arranged in matrix for displaying the image; and an image processing unit which, by having each pixel unit of the video signal as reference point, generates a drive signal for displaying an image based on processing which extracts a maximum value of relative gradations that are ratios of gradations with respect to a maximum gradation of the video signal or a maximum value of relative transmittances that are ratios of transmittances with respect to a maximum transmittance of the video signal among a group of pixel units including the pixel units taken as the reference points and a region including the pixel units neighboring to the pixel units taken as the reference points, and displays the image on the second liquid crystal display element at positions corresponding to the pixel units taken as the reference points based on the generated drive signal, wherein when the video signal inputted from the video source is of a display with bright-color pixel units in a dark background, the image processing unit generates, for each pixel unit of the second liquid crystal display element, the drive signal for displaying synthesized relative gradation S 2 that satisfies S 2 ≧S in a pixel unit group including the bright-color pixel units and pixel units neighboring to one of those pixel units, provided that relative gradation of the display with the bright-color pixel units based on the video signal inputted from the video source is S, and the synthesized relative gradation that is a product of the relative gradations displayed in each of the liquid crystal display elements of the second liquid crystal display elements is S 2 .