Character LCD Modules Vertical alignment technology

Throughout I have talked about the polarization of the liquid crystal molecules in the major axis direction is better than the minor axis direction. However, it is possible to make the polarization in the long axis direction of the minor axis direction of the liquid crystal, this is called the vertical alignment.
Having commercial value of the products can be manufactured having a vertical alignment liquid crystal, having different variables MVA mode. We need to do is to let all the molecules stand up. In the stationary state, so that the lower birefringence parameters that direction (long axis) parallel to the lightwave direction. So that the molecules stand up, it has a different vertical characteristics. Of course, we need to make certain the pretilt angle, so that it can rotate in an electric field.
Here, you should have some understanding of this negative anisotropic media. Is called anisotropic dielectric constant because it is parallel to the axis (long axis) is less than the vertical axis (short axis). So you will get the optical path difference is negative.
When an electric field is applied, eventually you can get this kind of arrangement.
In this mode, the electrode surface of the glass. This electrode material called ITO, this material is transparent, so it does not block the light waves passing through it into the opening does not affect the rate. This and the previously mentioned TN-type is the same.
Summarize, the MVA mode and IPS mode as there is a good viewing angle, and the opening rate is very good. So we can transfer characteristic to sum up all three of these technologies have commercial value.
To see that the electro-optical characteristic curves of three different display modes, the the lightwave voltage transmitted through the relationship between the mean square value. Wherein the red curve is the TN type. This is a steady display is transparent when an electric field is not applied, and when the electric field is increased gradually, slowly darken. There is low voltage-driven TN-type, a relatively high voltage to drive the TN type, the optical film of compensation the TN (FCTN). This is an important monitors, notebook computers and 15-inch, 17-inch display, it is widely used. The more expensive manufacturing price for the big screen with IPS or MVA technology. In this figure illustrates the IPS technology requires a relatively high voltage, the distance between the electrodes is greater than the TN or MVA art, because the distance between the two electrodes. At the same time, due to its low opening rate, require a brighter backlight. MVA technology is a Mid case, it's better viewing angle in the TN type but inferior IPS certain grayscale, certain grayscale stability than IPS. These three different modes, the opening rate and the electro-optical characteristic curve.OLED Display Module
Finally, look at the active matrix. As mentioned earlier, we have a display can control the brightness, one pixel can be composed by the tri-color red, green, blue, and finally need to have an active matrix drive, like the pair of FIG. Above. There row driver and column driver, may be used alone for the R / G / B addressing may be used alone to control each of the R / G / B three sub-pixels of luminance, so that a full-color display is made.
In summary, the nematic liquid crystal molecules having a fixed point, having controllable birefringence can be controlled by an electric field. Can control the transmission characteristics of each of the partial. Full-color display can be completed with a color filter, the plane of polarization can be modulated with a linear polarizer.
TN-type liquid crystal is a low-cost, low-performance products. Monitors and TV requires a wide viewing angle, so create IPS and MVA technology. TN type by the optical compensation film is extended viewing angle, can be used in the 15 and 17-inch monitors at. The need for a large screen with IPS and MVA technology, different companies using different techniques.serial display modules