Glossary definition of Double cell Super Twisted Nematic

Double-cell Super Twisted Nematic displaysenhance the STN LCD by placing cells on top of each other. This offers a true black and white display instead of the near-black and near-white levels typically found in standard twisted nematic displays. Such true black and white is possible with a double cell structure as the second cell, whose director points in the opposite direction, exactly cancels out the interference introduced bythe firstcell.

Double-cell Super Twisted Nematic displays also offer slightly improved contrast.