liquid crystal

Cs(storagecapacitor) storagecapacitor architecture

Generally, there are two most common storage capacitor architectures, namely Cson Gate and Cson Common. As the name implies, these two architectures can be known.

Storage capacitor is mainly in order to make good electrical voltage, can keep until the next update screen. So we must be like in the CMOS process, the use of different layers go line, to form a parallel plate capacitor. And in the process of TFT-LCD, is to use display electrode with line or common walk gate line, formed by the parallel plate capacitor, to create storage capacitance Cs.

A variety of polarity conversion modes of the panel

Due to the liquid crystal molecules have a characteristic, is not to have been fixed in a certain voltage constant, otherwise, time is long, even if you cancel the voltage, the liquid crystal molecules will be because of the destruction of the features, and unable to respond to the change of the electric field to the rotation, to form different grayscale. So every once in a while, the voltage must be restorable, in order to avoid damage to the characteristics of liquid crystal molecules. Display voltage in the liquid crystal display is divided into two kinds of polarity, one is normal polarity, and the other is the negative polarity. When the electrode voltage higher than the common electrode voltage is displayed, call it normal polarity. And when the display electrode voltage is lower than the com Mon electrode voltage, it is called negative polarity. Whether it's positive polarity or negative polarity, there will be a group of the same Brightness of gray-scale. So when the absolute value of the differential pressure fluctuation two layers of glass is fixed, whether in display electrode voltage is high, or the common electrode voltage is high, shown by gray-scale is the same. But in both cases, the turning of the liquid crystal molecules are exactly the opposite, also can avoid the above when the liquid crystal molecules to has been fixed in one direction, caused by the characteristics of destruction. That is to say, when the display screen have been fixed, we can still keep the positive and negative polarity alternately, to achieve The display screen does not move, and the liquid crystal molecules are not destroyed. Therefore, although the liquid crystal display screen you see is still, in fact, the voltage inside is constantly changing, and the liquid crystal molecules are constantly turning this way and the other way