| 摘要 |
In this invention, as a basic structure, an impedance element is connected in series to a liquid crystal layer (liquid crystal capacitance) of each pixel. The impedance of the impedance element is varied in accordance with a display signal. The resistance values of variable resistance elements are varied in accordance with a display signal being held by a display signal holding means that is provided in each pixel, whereby the impedance of the impedance element varies in accordance with the resistance states of the variable resistance elements. If an AC voltage is applied across the basic structure, an AC voltage produced by voltage division in accordance with the impedance of the impedance element is applied to the liquid crystal layer. Therefore, the AC voltage applied to the liquid crystal layer and hence the gradation level of the liquid crystal layer can be controlled by adjusting the impedance of the impedance element in accordance with a display signal. A display signal is not input to the liquid crystal layer directly and consumed there. Instead, an AC voltage produced by dividing, by the impedance element and the liquid crystal layer, an AC voltage corresponding to a display signal that is temporarily held by the holding means such as a capacitor is applied to the liquid crystal layer. Therefore, the power consumption can be reduced.
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