LCD dynamic driving method

The display is a liquid crystal display pixel due to the electric field is applied, the electric field around the display pixel electrodes on the two potential signal synthesis. Since DC electric field tends to reduce the life of the liquid crystal, therefore, generally only a very small DC component to establish an alternating electric field. DC component is typically less than 50mV. Driving the liquid crystal display is applied to the liquid crystal display by adjusting the electrode potential on the phase of the signal, the peak, frequency, etc. to establish a driving electric field in order to achieve display.
Liquid crystal display driving method are: static drive, dynamic driving method, dual drive method. This article will discuss the most widely used method to illustrate the dynamic drive.
Dynamic drive method
When the pixel Graphic LCD Display when there are many, such as dot matrix, in order to save huge hardware driver circuit, liquid crystal display production and arrangement of the electrodes do processing, the implementation of the matrix structure: that is, the level of a set of display pixel electrodes are connected back together leads, called row electrode; the vertical display pixel segment electrodes are connected together leads, called column electrodes. Each pixel on the display bits uniquely determined by their ranks. The dynamic driving method of a liquid crystal display is cyclically to the row selection pulses applied to the electrodes, and to all of the column electrodes in response to selection or non-selection with a driving pulse, in order to achieve all of the pixels of a row of display. This scan is progressive sequence, the cycle is very short, making the COG LCD Display showing a stable image.
Each line in a frame is equal to the selection time. Assuming a number of scanning lines is N, the scan time is 1, then the row selection time is occupied with a time of 1 / N. This is the liquid crystal display driver duty factor, also known as the duty cycle.