How to make the Character LCD Modules?

Making an LCD manufacturing a liquid crystal is much more complex. The manufacturing conditions of the LCD need:
Light polarization.
LCD can transmit and change polarized light.
The structure of the liquid crystal can be changed by the current.
Presence of conductive transparent material.Lcd display module

The LCD device clever use of the four conditions.
Manufacturing an LCD need two polarizing glass. There is a special polymer can be produced in the object surface, a fine groove, such a polymer rub in the polarizing film on the glass side. The groove must polarizing film in the same direction. Then on a filter, add a layer of nematic liquid crystal. Groove causes the liquid crystal molecular alignment of the first layer and the filter in the same direction. Next, coupled with the second sheet of glass, so that the direction of the polarizing film and the polarizing film at right angles to the direction of the first piece of glass. Each subsequent layer of nematic phase molecules are twisted at an angle until the top layer and the bottom layer of the difference between 90 ° and polarized glass filters coincide.
When the light irradiated on the first filter, it occurs polarization. Each layer of molecules will lead to the next layer of the light they receive. When the light passes through each layer of the liquid crystal, the corresponding molecular also change the plane of polarization of the light so that the angle of the direction of the molecules themselves. When the light reaches the most distal end when the liquid crystal material, its direction of polarization, and the last layer of molecules at the same angle. If the last layer of the liquid crystal and the second block of the polarizing direction of the glass filter match, the light can pass therethrough.serial 20x2 lcd
If we add charge to the liquid crystal molecules and their distortions will be eliminated. Straight after the liquid crystal molecules change the light passes through their point of view, no longer match so that the direction of the light direction and the top of the polarizing filter. Therefore, this specific area on the LCD will not light can be adopted, thus darker than the surrounding area.