(57) Scanning electrodes (L) constituting a ferroelectric liquid crystal panel (20) are
divided into a plurality of scanning electrode groups, and a selective voltage (VCA)
is applied sequentially to the scanning electrodes constituting the scanning electrode
group over two group fields. In a first group field, a signal voltage (VSC) for changing
picture elements on the selected scanning electrode from the bright display state
to the dark display state, or a signal voltage (VSE) for not changing the bright and
dark display states is applied to the signal electrodes. In a second group field,
a signal voltage (VSD) for changing the picture elements on the selected scanning
electrode from the dark display state to the bright display state, or a signal voltage
(VSE) for not changing the bright and dark display states is applied to the signal
electrodes. Uniting the two group fields together, changes in display state of the
picture elements constituting the scanning electrode group are responded. Thereby,
as long as the display state of the picture elements is not changed, the change in
effective voltage waveform applied to the picture element can be kept smaller than
the change in effective voltage waveform due to switching of the driving voltage combination
corresponding to the two group fields.
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