G - Physics – 09 – F
Patent
G - Physics
09
F
G09F 13/22 (2006.01) G09G 3/12 (2006.01) G09G 3/30 (2006.01) H05B 33/12 (2006.01)
Patent
CA 2345562
A data side driving IC incorporates pull-up elements and pull-down elements to be applied with modulating voltages of +1/2VM and -1/2VM, respectively. A scanning side driving IC incorporates pull-up elements to be applied with a positive write voltage of +VW from a positive voltage supply circuit, and pull-down elements to be applied with a negative write voltage of -VW from a negative voltage supply circuit. Each data electrode is driven by a positive voltage of +1/2VM or a negative voltage of -1/2VM. Each scanning electrode is controlled so that it is applied with a positive write voltage of +VW or a negative write voltage of -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.
Harada Shigeyuki
Kiyohara Atsushi
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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