TN: Twisted Nematic

Twisted nematic display, (TN), is type of liquid crystal cell structure that aligns the LC molecules through a 90′ rotation. This twisted nematics configuration can produce images in two modes: Positive or Negative. Positive Mode provides white background and white segments.

Twisted nematic LCD modules are typically the least expensive display option, But can only effectively display content up to 16 lines (or 2 rows of text) without losing performance.