Patent ID: 7495650

Claim:
An electro-optical device comprising: scanning lines; data lines intersecting the scanning lines, the data lines including blocks of plural data lines; image signal lines that supply image signals; pixels arranged correspondingly to intersections of the scanning lines and the data lines, for producing gray-scale levels in response to image signals from the image signal lines that are sampled on the data lines for horizontal scanning periods in which a plurality of scanning lines are selected; a scanning line driving circuit for sequentially selecting the plurality of scanning lines for each horizontal scanning period; a shift register including a plurality of stages that sequentially transmit transmission start pulse signals supplied at the beginning of each of the respective horizontal scanning periods according to a predetermined clock signal, the stages including a first/end stage which is the first stage or the last stage to receive the start pulse signal of a horizontal scanning period; a first/end path for branching the pulse signal transmitted to the first/end stage to one branch and another branch; an operation circuit for calculating logical operation signals of the branched pulse signal from the one branch and predetermined enable signals such that pulse widths do not overlap with each other; and a plurality of sampling switches, including a block of sampling switches that is electrically interposed between the image signal lines and one block of plural data lines, the one block of sampling switches being configured to turn on to sample the image signals supplied to the image signal lines onto the one block of plural data lines, wherein the signals are turned on and off substantially at the same time based on the same logic signals corresponding to the one block of plural data lines, wherein sampling switches and data lines corresponding to the another branch of the path are omitted.