| 摘要 |
PURPOSE:To improve the stability of operation and the uniformity of display state by setting a polarizing plate of a ferroelectric liquid crystal at a proper angle to control driving of the liquid crystal with the quantity of polarization. CONSTITUTION:A device consists of a ferroelectric liquid crystal device 8, a controllable liquid crystal driving power source 9, and a polarization quantity dedecting part 10 of the liquid crystal device. The detecting part consists of a capacitor 11 connected in series to the liquid crystal device 8, an amplifier having a high impedance input, and a circuit 15 which controls a switch 13. The liquid crystal driving power source 9 is controlled by a signal from the polarization detecting part 10, and a voltage or current applie to the liquid crystal device is so determined that the quantity of polarization of the liquid crystal device 8 is a set value. Thus, the stability of operation and the uniformity of display state are improved. |
