Patent ID: 7973809

Claim:
A driving circuit of an electro-optical device that includes a plurality of scanning lines, a plurality of data lines, and a plurality of pixels arranged at positions corresponding to intersections of the scanning lines and the data lines, comprising: a scanning line driving circuit that drives the plurality of scanning lines; and a data line driving circuit that drives the plurality of data lines, wherein: one field is divided into p (p is an integer that is equal to or more than two) groups and each group is divided into two sub-fields, the p groups each are set to have the length of a time period that is equal to one another, the 2p sub-fields that constitute the one field are set to different lengths of time periods in such a manner that a boundary between two sub-fields of each group is shifted by a predetermined interval compared to the boundary between the two sub-fields of the preceding group, the total length of time periods of sub-fields that are in an on state during the field constituted by the sub-fields is set in accordance with a gray-scale level that is specified to each of the pixels during the field, different gray scale values are expressed by turning on a single sub-field or n (n is an integer that is equal to two or more and that is equal to or less than 2p) sub-fields that are adjacent to each other, the scanning line driving circuit includes: a shift register that has stages corresponding to the plurality of scanning lines and that sequentially delays a pulse, which is supplied at a time interval corresponding to each of the sub-fields, over the stages in accordance with a clock signal, and logic circuits each provided for the plurality of scanning lines, the logic circuits performing a logical operation on pulses that are overlappingly output from the stages of the shift register to supply non-overlapping scanning signals the corresponding scanning line to indicate selection of the scanning lines, and when one of the scanning lines is selected, the data line driving circuit supplies a data signal, which corresponding to a gray scale of the pixel corresponding to the selected one of the scanning lines and one of the data lines, to the one of the data lines in accordance with an on state or an off state that is set to a sub-field corresponding to the selection.