The display principle of STN type is similar to that of TN, except that the liquid crystal molecules in TN twisted nematic field effect rotate the incident light by 90 degrees. The STN super twisted nematic field effect rotates the incident light by 180-270 degrees.
It should be noted that a simple TN LCD display only has two colors (black and white), and cannot achieve color changes. STN LCD displays involve the relationship between LCD materials and the interference of light, so the displayed colors are mainly light green and orange.
But if a color filter is added to a traditional monochrome STN LCD display and any pixel in the monochrome display matrix is divided into three sub pixels. By using color filters to display the three primary colors of red, green, and blue, and then adjusting the proportions of the three primary colors, full-color mode colors can also be displayed.
In addition, the larger the display screen of TN type LCD displays, the poorer the screen contrast will appear. However, with the improvement technology of STN, the lack of contrast can be compensated for.
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