Patent ID: 6888525

Claim:
A display device for providing multiple-tone representations, the display device comprising: a data driver for receiving display data and providing a drive voltage of a level corresponding to the display data; a scan driver for providing a selecting voltage; and a display panel having a plurality of pixels arranged in a matrix, the display panel coupled to the data driver and to the scan driver to provide the drive voltage from the data driver to a pixel of the display panel selected in accordance with the selecting voltage, wherein selected pixel of the display panel displays a tone corresponding to the drive voltage, wherein the number of tones is equal to or more than eight, and wherein the intensities or brightnesses of all the intermediate tones between the first tone corresponding to the maximum drive voltage and the third tone one higher than the second tone corresponding to the minimum drive voltage are at least as great as the intensities or brightnesses on a straight line linking the intensity or brightness of the first tone and the intensity or brightness of the third tone, when the intensities or brightnesses as a function of the tones are plotted on a graph having the tones along the graph abscissa and the intensity or brightness on a logarithmic scale along the graph ordinate.