| 摘要 |
<p>PURPOSE:To make high-speed and high-quality printing possible by specifying the voltage which is applied to a ferroelectric liquid crystal such as a liquid crystal having chiral smectic C phase and H phase or the like. CONSTITUTION:When the voltage impressed to a ferroelectric liquid crystal is specified in accordance with a formula, an average value of the voltage is zero, and no DC components exit at all, and the degradation of the ferroelectric liquid crystal due to an electrochemical reaction is not caused. Since a negative voltage is impressed to the ferroelectric liquid crystal in the latter time T4 of a movement time T2 in case of formation of photoinsensitive dots, a light leak is reduced in the movement time T2, and the influence of a light leak in the time of next one-line driving is eliminated. Further, driving of a light source and that of a liquid crystal switch element are synchronized to reduce the intensity of light emitted from the light source in the movement time T2, and a light leak is reduced furthermore.</p> |
