(1) (Double layer STN) A supertwisted nematic (STN) passive LCD display that is used in high-temperature environments. A second, but inactive, LCD layer functions like the film in FSTN, except that the layer's optical properties change at the same rate as the working layer. See FSTN and LCD types.

(2) (Dual scan STN) An earlier passive matrix display method that enabled higher laptop resolution by addressing two modules simultaneously. For example, two 240-line passive matrix subsystems were used to create one 480-line screen. See FSTN and LCD types.