Driving method and device of electro-optic element, and electronic equipment

A driving device of a liquid crystal element for allowing said liquid crystal element to display a level of grayscale, the liquid crystal element displays the level of grayscale, throughout a frame period, by switching to an ON-state the liquid crystal element during a period corresponding to grayscale data that defines said level of grayscale, the driving device comprising:

• a dividing circuit that divides the frame period into a plurality of sub-fields, the plurality of sub-fields having a first group of sub-fields continuous with respect to one another and a second group of sub-fields continuous with respect to one another, the second group of sub-fields being subsequent to the first group of sub-fields,
• each of the plurality of sub-fields of the first group of sub-fields having a same first sub-field period and each of the plurality of sub-fields of the second group of sub-fields having a same second sub-field period, the second sub-field period being substantially equal to a sum of a length of the first sub-field periods and a length of any one of the first sub-field periods, a part of sub-field periods of said plurality of first sub-field periods and said plurality of second sub-field periods being included in one frame period of two continuous frame periods, and a rest portion of sub-field periods being included in the other frame period;
• a selecting circuit that selects, according to the grayscale data, sub-fields that are adjacent to each other in a direction from a temporal position, the temporal position being between the first group of sub-fields and the second group of sub-fields, toward a sub-field of the first group of sub-fields or a sub-field of the second group of sub-fields at a position most remote from the temporal position;
• and
• a driving circuit that switches to the ON-state the liquid crystal element during a period that the sub-fields are selected;
• and
• a switching circuit that switches to the ON-state a sub-field located between the first group of sub-fields and the second group of sub-fields, regardless of the level of grayscale, to supply a threshold voltage relating to driving the liquid crystal element.