Appeal No. 1997-0830
Application 08/132,998
an X driver circuit which is supplied with display
data, and which transmits a voltage corresponding to the
display data to each of the plurality of data lines;
a power source, which supplies voltages to the Y
driver circuit and the X driver circuit, the supply voltages
of the X driver circuit being n voltages having different n
voltage levels;
a control signal generator circuit for generating a
time signal which divides one horizontal scanning cycle into a
first period and a subsequent second period;
wherein said X driver circuit includes a voltage
divider circuit which generates m voltages having m different
voltage levels from said n voltages of n different voltage
levels
supplied from said power source (n<m, wherein n and m are
integers greater than 2) and outputs a voltage selected from
said m voltages; and
a control circuit, supplied with said time signal
and a signal corresponding to said display data, which con-
trols said voltage divider circuit so that a first voltage is
selected from said m voltages in said first period, and a
second voltage is selected in said second period from said m
voltages, in response to said time signal and said signal
corresponding to said display data, in a manner that a time
constant, when said first voltage is output to the data lines,
is smaller than a time constant when said second voltage is
output to the data lines, said second voltage corresponding to
said display data;
wherein said X driver circuit outputs said first
voltage and said second voltage, as selected, to each of the
data lines in said first period and said second period, re-
spectively.
The Examiner relies on the following references:
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