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STN LCD

A super-twisted nematic (STN LCD) display is a type of passive matrix liquid crystal display (LCD). STN LCD displays provide more contrast than twisted nematic (TN) by twisting the molecules from 180 to 270 degrees. They also require less power and are less expensive to manufacture than TFT LCDs, another popular type of LCD. However, STN LCD displays typically suffer from lower image quality and slower response time than TFT displays. STN LCD displays are used in some inexpensive mobile phones and informational screens of some digital products.

CSTN LCD stands for "color super-twist nematic" a form of passive matrix LCD (Liquid Crystal Display) for electronic display screens. Originally developed by Sharp Electronics Corporation. Unlike TFT, CSTN LCD is based on a passive matrix, which is less expensive to produce. The original CSTN LCD displays developed in the early 90's suffered from slow response times and ghosting (where lit pixels in a row can affect the unlit pixels). Recent advances in the technology, however, have made CSTN LCD a viable alternative to active matrix displays. New CSTN LCD displays offer 100ms response times (TFT 8ms), a 140 degree viewing angle, and high-quality color rivaling TFT displays - all at about half the cost. A newer passive-matrix technology called High-Performance Addressing (HPA) offers even better response times and contrast than CSTN LCD.

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