(57) The invention seeks to provide a method for implementing a gray-scale display of
an electro-optical device according to a time ratio gray-scale method without providing
reset lines. In an electro-optical device comprising, at an intersection of a scanning
line and a data line, an electro-optical element, a driving transistor for driving
the electro-optical element, a switching transistor for controlling the driving transistor,
and a reset transistor having the function of resetting the driving transistor to
a non-conducting state, a gray-scale is obtained by performing a plurality of set-reset
operations, each set-reset operation comprising: a setting step of supplying an on-signal
to the switching transistor via the scanning line, and of supplying a set signal for
selecting a conducting state or a non-conducting state of the driving transistor to
the driving transistor via the data line and the switching transistor in accordance
with the on-signal; and a resetting step of supplying an on-signal for the reset transistor
via the scanning line so as to reset the driving transistor to the non-conducting
state.
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