Patent ID: 7898534

Claim:
An electro-optical apparatus comprising: a plurality of rows of scanning lines; a plurality of columns of data lines; a plurality of pixels disposed so as to correspond to intersections of the plurality of rows of scanning lines and the plurality of columns of data lines, wherein the scanning lines, the data lines, and the pixels are disposed in a pixel area, and the pixel area is virtually divided into at least first and second regions along the scanning lines, a scanning-line driving circuit including a shift register for sequentially shifting a transfer start pulse, the scanning-line driving circuit selecting a scanning line included in one of the first and second regions and then selecting a scanning line included in the other one of the first and second regions; a block selection circuit for sequentially selecting a block composed of the data lines for m columns (m is an integer that is larger than one and smaller than the number of the data lines) when the scanning line is selected; a data-signal supplying circuit for supplying to m image signal lines respective data signals having voltages according to grayscales of pixels corresponding to the selected scanning line and the data lines for the m columns belonging to the selected block; a sampling switch disposed on each of the data lines, the sampling switch sampling the data signals supplied to the m image signal lines into the data lines for the m column belonging to the selected block selected by the block selection circuit; and a voltage measuring circuit having channels, the voltage measuring circuit measuring a voltage of a data signal supplied to at least one of the m image signal lines in a period from a rising of the transfer start pulse to a supply of an image signal corresponding to the scanning line at a first row and changing a voltage amplification factor for the channels on the basis of the measured voltages.