| 摘要 |
<p>PURPOSE:To raise the gradation controllability by adopting a signal inputting system of a positive type display system and also a negative logic, in a driving method of a liquid crystal shutter. CONSTITUTION:A liquid crystal shutter 3 is driven statically by 15V applied voltage, and 5KHz driving frequency, and to electrodes 13, 13', usually a liquid crystal driving signal is applied, and a light beam is cut off. In such a state, as for a picture element for executing a display, it is stopped selectively to apply the liquid crystal driving signal, and a light beam is made to transmit (negative logic driving). In case of a positive type display, as for the liquid crystal shutter, a response from an open state to a closed state is quick, and a response from the closed state to the open state is slow. Since the shutter rises slowly from the closed state to the open state, therefore, an opening degree or an opening time of the picture element is controlled by varying the signal input time, and the quantity of a light beam for transmitting through the picture element is brought to a gradation control.</p> |
