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FSTN – Foil/Film compensated Super Twisted Nematic

A variation of the Super Twisted Nematic Display providing better optical performance.

The development of TN technologies produced further variants, including FSTN. These are film-compensated displays that contain one extra layer of compensating film (FSTN) or two layers (FFSTN), in addition to the polarisers, to boost contrast and sharpness. There are potential stability issues when operating in the high end of the display’s operating temperature range causing contrast to

deteriorate so the Double Super Twisted Nematic (DSTN) and Advanced Super Twisted Nematic (ASTN) displays were developed to address contrast issues by delivering stable display contrast performance over the entire temperature range of the application; specifically, automotive.

FSTN cell

DSTN-FSTN principle