STN liquid crystal display principle

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STN liquid crystal display principle [Copy link]

STN LCD display principle

The display principle of STN is similar to TN, except that the liquid crystal molecules of TN twisted nematic field effect rotate the incident light by 90 degrees, while STN super twisted nematic field effect rotates the incident light by 180~270 degrees. It should be noted here that a simple TN LCD display has only two states of light and dark (or black and white), and there is no way to change the color. STN LCD involves the relationship between liquid crystal materials and the interference of light, so the displayed tones are mainly light green and orange. However, if a color filter is added to the traditional monochrome STN LCD, and any pixel of the monochrome display matrix is divided into three sub-pixels, the three primary colors of red, green and blue are displayed through the color filter respectively, and then the proportion of the three primary colors is adjusted to display the color of the full color mode. In addition, if the display screen of a TN-type LCD display is made larger, the screen contrast will appear poorer. However, the lack of contrast can be compensated by the improved STN technology.