| 摘要 |
<p>The present invention relates to a method of driving a liquid crystal light shutter for using a liquid crystal material whose dielectric anisotrophy becomes zero when a specified frequency is inputted is sealed between the common and signal electrodes (13, 14). The signal for driving the liquid crystal light shutters (15-18) comprises a signal the frequency of which is lower than the specified frequency and a signal obtained by superposing a signal of a frequency higher than the specified frequency on a signal of a frequency lower than the specified frequency. The signal for reversely driving the liquid crystal light shutters comprises a signal of a frequency higher than the specified frequency and a silence signal. A frequency fL3 lower than FL may be applied for a short period to further enhance on tendency. A high frequency hysteresis is avoided by the silent signal in the case of off- drive signal. Temperature characteristics are also improved. <IMAGE></p> |
