Mobile Phone LCD Screen Quality Control Expert

IPS technology of LCD

by:Kimeery     2021-08-21
IPS technology for LCD screens Many LCD TVs use a wide viewing angle mode. Let's take IPS technology as an example. IPS technology is a panel technology introduced by Hitachi in 2001, and it is usually called 'Super TFT'. From a technical point of view, the traditional LCD display, their liquid crystal molecules are generally switched in a vertical and parallel state, and then PVA and MVA changed it to a vertical and two-way tilt switching form. IPS technology is very different from previous technologies. The most obvious difference is that no matter what the state is, the liquid crystal molecules are always parallel to the screen, only the direction of rotation of the molecules will change when the power is on or under normal conditions. different. It is worth noting that the rotation of the liquid crystal molecules of MVA and PVA belong to spatial rotation (that is, the Z axis). Unlike the above, the rotation of liquid crystal molecules of IPS belongs to in-plane rotation (that is, the X-Y axis). In order to adapt to such a structure, IPS has to improve the electrodes, making the electrodes on the same side, so as to form a planar electric field. There are two situations in this design. The first is that some of the previous viewing angle problems can be solved, and the other is that the marginal electric field effect will cause the phenomenon of low light efficiency of the liquid crystal (that is, low light transmittance). . Therefore, the relatively slow response time is also a disadvantage of IPS. The highest level of the current IPS LCD screenis: 16.7M colors, its viewing angle is 178 degrees, and the fastest response time is 16ms.
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