Sharp Kabushiki Kaisha Corporation

Atsushi Kiyohara

Shigeyuki Harada

A data side driving IC incorporates pull-up elements and pull-down elements to be applied with modulating voltages of &plus;&frac12;VM and &minus;&frac12;VM, respectively. A scanning side driving IC incorporates pull-up elements to be applied with a positive write voltage of &plus;VW from a positive voltage supply circuit, and pull-down elements to be applied with a negative write voltage of &minus;VW from a negative voltage supply circuit. Each data electrode is driven by a positive voltage of &plus;&frac12;VM or a negative voltage of &minus;&frac12;VM. Each scanning electrode is controlled so that it is applied with a positive write voltage of &plus;VW or a negative write voltage of &minus;VW or it assumes a ground potential or a floating potential. Since the data electrodes and the scanning electrodes can be driven with high symmetry of positive and negative polarities, the long-term reliability can be enhanced, while at the same time the peripheral circuitry can be simplified.

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Yamatokoriyama, Japan

Atsushi Kiyohara