| 摘要 |
<p>PURPOSE:To decrease a variance of a characteristic, and to execute control at a high speed by inputting a reference voltage value repeated in a prescribed period, as a signal, controlling its timing by a digital value, and controlling an applied voltage. CONSTITUTION:As a reference signal waveform, a half wave of a sine wave is used. Sine waves as shown in VDD1, VDD2 are applied to signal lines Y1 303, Y2 304 lying in the scanning line direction, and bipolar signals whose polarity is inverted, as shown in VGG1, VGG2 are applied to signal lines X1 301, X2 302 lying in the information line direction. By selecting a timing for applying this bipolar signal, a voltage applied to each picture element can be controlled arbitrarily. In such a way, by varying the timing of the bipolar signal, the charge quantity and the potential accumulated in four liquid crystal picture element electrodes A-D are determined, and also, by taking arbitrarily the potential of a counter electrode, magnitude of an electric field applied to a picture element and a liquid crystal is determined.</p> |
