STN (Super-Twisted Nematic) is an LCD technology that improves on TN (Twisted Nematic) by twisting liquid crystals at larger angles (up to 270°). This results in higher contrast and wider viewing angles, particularly in simple monochrome displays. STN displays are inexpensive and energy-efficient, making them suitable for portable devices, measuring instruments, calculators, and industrial or medical systems.
Their drawbacks are slower response times and poorer readability for fast-moving content, limiting use in video or animation. Variants such as FSTN and DFSTN include additional optical layers to improve contrast and color reproduction.
