Patent ID: 8339389

Claim:
A method of driving an electro-optical device including a plurality of scanning lines, a plurality of data lines, a switching transistor and a pixel electrode which are provided at an intersection between one of the scanning lines and one of the data lines, a counter electrode opposite to the pixel electrode, and an electro-optical layer interposed between the pixel electrode and the counter electrode, the method comprising: supplying a data signal alternately having a positive voltage and a negative voltage to the pixel electrode through the one of the data line provided that the positive voltage is of a potential greater than a counter electrode potential applied to the counter electrode and that the negative voltage is of a potential lower than the counter electrode potential; setting the counter electrode potential to reduce a flicker; in a predetermined period which comprises a first period and a second period, supplying a first voltage that is one of the positive voltage and the negative voltage to the pixel electrode in the first period; and supplying a second voltage that is the other of the positive voltage and the negative voltage to the pixel electrode in the second period; wherein a ratio of a length of the first period to a length of the second period is variable in the predetermined period, the ratio of the length of the first period to the length of the second period is varied after the counter electrode potential has been set to reduce the flicker, the predetermined period corresponds to one frame, the one frame comprises a first field and a second field, the first field corresponds to the first period, the second field corresponds to the second period, and in one of the first field and the second field, a ratio of a period length of the first field to a period length of the second field in the one frame is adjusted by supplying a third voltage as the data signal to the data line during a third period.