The process of va panel is different from other knowledge in the arrangement of liquid crystal molecules. However, the effect of ips screen is poor. The response speed is the slowest in tn,ips,va three technology, the power consumption is relatively large, the color performance may be a little better than ips, it is not suitable for home, if there is a special work demand is good. Va panel (vertical alignment, vertical arrangement) the main manufacturers: Samsung, Youda optoelectronics, Qimei electronics, fuijtsu, Epson va liquid crystal panel is widely used in the current display products, 16.7m color and large visual angle are its most obvious technical characteristics. At present, the va panel is mainly divided into two types, one is Mva type, the other is Pva type. Mva (multi-domain vertical alignment, multi-region vertical arrangement) technique is based on the principle of adding protrusions to form multiple visual regions. The liquid crystal molecules are not completely vertically arranged at static time, and the liquid crystal molecules are arranged horizontally after the voltage is applied, so that the visual angle can be increased to more than 160 degrees by MVA technique, and the response time is shorter than that of ips and tn film. This technology is developed by Fujitsu Company, at present, Qimei, Youda Optoelectronic and other panel factories in Taiwan have been authorized to use.
Pva is a kind of panel type introduced by Samsung. It has been further developed and improved on the basis of Fujitsu mva panel. It is a kind of image vertical adjustment technology, which directly changes the structure of liquid crystal unit, so that the display efficiency can be greatly improved to obtain brightness output and contrast better than mva. In addition, on the basis of these two types, the improved s-pva and p-mva panel types are extended, mainly in color, response time and visual angle, and continue to make effective improvements. The pva type is a panel type developed by Samsung, which is a vertical adjustment technology of image. This technology directly changes the structure of liquid crystal unit, so that the display efficiency can be greatly improved to obtain brightness output and contrast better than mva. In addition, the improved s-pva and p-mva panel types are delayed on the basis of these two types. In the technical development, the visual angle can reach 178 degrees, the response time is controlled within 20 milliseconds (most of them use overdrive acceleration to reach 6ms), and the contrast can easily exceed the higher level of 1000 ≤ 1. The principle of pva wide View Technology Analysis pva wide view technology also belongs to the category of va technology, in fact, it is very similar to mva, it can be said to be a kind of deformation of mva. PVC uses transparent ito layer to replace the protrusions in mva, and the manufacturing process has good compatibility with tn mode. The transparent electrode can obtain better opening rate and minimize the waste of backlight source. After all, PDA and mva are the same, both of which are the same in actual performance. PVA also belongs to nb (normally dark) mode liquid crystal, and the pixel is dark when tft is damaged and can not be electrified. This mode greatly reduces the possibility of "bright spots" in liquid crystal panels.