| 摘要 |
Changes-with-time in the voltages of exposed and unexposed portions of a liquid crystal recording layer with respect to a photoconductive layer having a varying dark current value are found by varying an applied voltage, and the applied voltage and the value of a dark current through the photoconductive layer are determined such that when the voltage of the unexposed portion of the liquid crystal recording layer reaches the threshold voltage of the liquid crystal recording layer, the difference in voltage between the exposed and unexposed portions of the liquid crystal recording layer reaches a maximum, so that information is recorded with the photoconductive layer and at the applied voltage, where a potential difference is obtained, which is at least one half of the difference (maximum contrast) in the voltages applied on the liquid crystals at the exposed and unexposed portions of the liquid crystal recording layer.
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