| 摘要 |
A data voltage source circuit is provided for applying column electrode driving voltage to a column electrode driver. The data voltage source circuit has a voltage source for supplying column electrode driving voltage of about one half of a maximum voltage for driving the column electrode, a diode provided between the voltage source and an output terminal, a first switch and a second switch, and a voltage adding capacitor provided between a junction of the first and second switches and the output terminal. The column driver has an input terminal connected to the output terminal of the data voltage source circuit, a plurality of output terminals connected to the column electrodes, a third switch, and a fourth switch. A control circuit is provided for producing control signals for controlling the first to fourth switches. The control signals control ON/OFF operations of first to fourth switches for stepwisely applying the column electrode driving voltage of one half of the maximum voltage and the maximum voltage.
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