Patent ID: 7710410

Claim:
An electro-optical device, comprising: a plurality of scanning lines; a plurality of data lines; a plurality of pixels corresponding to intersections between the scanning lines and the data lines, wherein each of the pixels has a pixel electrode, and a switching element which, when turned on by a first or a second selection voltage applied to the corresponding scanning line, electrically connects the corresponding data line to the pixel electrode; a scanning line driving circuit for supplying the first or the second selection voltage to the scanning lines for selecting the scanning lines in a predetermined order, wherein the first selection voltage and the second selection voltage are sufficient to turn on the switching elements, and wherein the second selection voltage is smaller than the first selection voltage; and a data line driving circuit for supplying image signals to the data lines in accordance with gray-scale levels to be displayed by the pixels corresponding to the selected scanning lines; wherein said device has an entire screen display mode, in which an entire screen of the device is set for displaying images, and a partial display mode, in which a part of the screen is set as a display region for displaying images and a remaining part of the screen is set as a non-display region not for displaying images; and in the entire screen display mode, the scanning line driving circuit is configured for supplying the first selection voltage to the scanning lines of the display region for a first period to turn on the respective switching elements of the display region during said first period, and an OFF voltage to the scanning lines of the display region to turn off the respective switching elements outside said first period; and in the partial display mode, the scanning line driving circuit is configured for supplying the second selection voltage to the scanning lines of the display region for a second period longer than the first period to turn on the respective switching elements of the display region during said second period, and the OFF voltage to the scanning lines of the display region to turn off the respective switching elements outside said second period.