| 摘要 |
<p>A cholesteric liquid crystal display device uses a general-purpose STN liquid crystal driver where consumption energy is reduced with a small increase of a circuit area and circuit cost. The device performs a first step for making a pixel in a planar state and a second step for increasing a mix ratio of a focal conic state in the pixel. The device is provided with a voltage generating circuit and driver circuits (28, 29) applying a voltage pulse to the pixel based on prescribed voltage from the voltage generating circuit. The voltage generating circuit is provided with a boosting part (41) generating boosting voltage from power voltage, a voltage switching part (42) generating a voltage control signal and a voltage stabilizing part (43) generating prescribed voltage corresponding to the voltage control signal from boosting voltage. The voltage stabilizing part (43) suppresses output voltage fluctuation with respect to fluctuation of boosting voltage. The boosting part switches a boosting ratio in the first step and the second step.</p> |
