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What is the difference between TFT LCD and STN LCD

TFT liquid crystal screen refers to thin film transistor, that is, each liquid crystal pixel is driven by the thin film transistor integrated behind the pixel, so as to display screen information at high speed, high brightness and high contrast. It is one of the best LCD color display devices at present.

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TFT LCD display


Its effect is close to CRT display. It is the mainstream display device on notebook computers and desktop computers. Each pixel of TFT LCD screen is controlled by TFT integrated on itself, which is an active pixel. Therefore, not only the speed can be greatly improved, but also the contrast and brightness can be greatly improved, and the resolution has reached a high level.


STN uses an electric field to change the arrangement of twisted liquid crystal molecules with an original degree of more than 180 degrees, so as to change the optical rotation state. The applied electric field changes the electric field by scanning line by line. In the process of repeatedly changing the voltage by the electric field, the recovery process of each point is slow, resulting in afterglow. Its advantage is low power consumption and has the greatest advantage of power saving.


The display principle of color STN is to add a color filter to the traditional monochrome STN LCD, and divide each pixel in the monochrome display matrix into three sub pixels. The color picture can be displayed by displaying the three primary colors of red, green and blue through the color filter. Different from TFT, STN belongs to passive LCD, which can display 65536 colors at most.


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