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We have introduced some principle knowledge of TFT LCD before. Let's introduce the classification of common TFT color screen panels:

VA type LCD panel: at present, VA type LCD panel is the most widely used type of display products, mostly used in relatively high-end products. 16.7M color (8bit panel) and relatively large viewing angle are its most obvious technical features. Now VA type panel is divided into two types: MVA and PVA.

MVA LCD panel: its full name is multi domain vertical alignment, which is a multi quadrant vertical alignment technology. It uses protrusions to make the liquid crystal stationary, which is not a traditional vertical type, but inclined to a certain angle; When a voltage is applied to it, the liquid crystal molecules can be quickly changed into a horizontal shape to make the backlight pass faster, which can greatly shorten the display time. Also, because this protrusion changes the alignment of liquid crystal molecules, the angle of field of view is wider. It can reach 160 DEG when the viewing angle is increased; Above, the reaction time can also be shortened to less than 20ms.

TFT LCD panel:

PVA liquid crystal panel: This is a panel type launched by Samsung. It is a vertical image adjustment technology. This technology can directly change the structural state of its liquid crystal unit, greatly improve the display effect, and obtain brightness output and contrast better than MVA. In addition, two improved types are extended on the basis of these two types: S-PVA and p-mva. In terms of technical development, the visual angle can reach 170 degrees, the response time is controlled within 20 milliseconds (8ms GTG can be achieved by overdrive acceleration), and the contrast can easily exceed the high-level technology of 700:1, Most of the products of Samsung's own brands are PVA LCD panels.

IPS type liquid crystal panel: IPS type liquid crystal panel has a series of advantages such as large viewing angle, fine color and so on. The liquid crystal panel looks more transparent, which is also a method to identify IPS type liquid crystal panel. Many liquid crystal displays of Philips use IPS type liquid crystal panel. S-IPS is the second generation of iPS technology, which once again introduces some relatively new technologies to improve the gray-scale reversal of IPS mode at some specific angles. LG and Philips independent panel manufacturers also launched LCD panels with IPS as their technical characteristics.

TFT LCD

TN type LCD panel: this type of LCD panel is generally used in entry-level and some middle-end products. The price is relatively affordable and low, which is selected by many manufacturers. Compared with the previous two types of LCD panels, the technical performance is slightly inferior. It can not show the gorgeous color of 16.7M, and can only reach the color of 16.7M (6bit panel), but the response time is easy to improve. The visual angle is also limited. The visual angle will not exceed 160 degrees. In the current market, most products with a response time of less than 8ms are TN liquid crystal panels.