The present invention provides a technique of a method for driving an
image displaying apparatus to suppress animated picture pseudo-contour,
flicker disturbance and pseudo-contour disturbance by making weighting of
light emission within a field is made equal to or almost equal to each
other at all gradations. According to this technique, when an image
signal of multiple gradation is expressed by dividing one field duration
into a plurality of subfields with different relative ratios of
luminance, a given number of subfields among a plurality of subfields are
divided into "2n" subfields (SF1a to SF8b) wherein "n" represents an
arbitrary integral number. Then, "2n" subfield groups (SF1a to SF8a, SF1b
to SF8b) are formed so that one group divided into "2n" subfield belong
to the groups different from each other. Subfield groups (A and B) are
symmetrically arranged with respect to the center of one field duration,
and the subfields (SFna, SFnb) divided into "2n" subfields are
symmetrically arranged.