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The twisted nematic effect (TN-effect) was a major technological breakthrough that made the manufacture of large, thin liquid crystal displays practical and cost competitive. Unlike earlier flat-panel displays, TN-cells did not require a current to flow for operation and used low operating voltages suitable for use with batteries.
A STN (super-twisted nematic) display is a type of liquid-crystal display (LCD). An LCD is a flat-panel display that uses liquid crystals to change its properties when exposed to an electric field, which can be used to create images. This change is called the twisted nematic (TN) field effect. Earlier TN displays twisted the liquid crystal ...
twisted configurations with dichroic dyes twisted nematic field-effect, [2] TN supertwisted nematic effects, STN, the total twist is > 90° SBE (supertwisted birefringence effect) [3] DSTN: double layer STN effect FSTN: foil-compensated supertwisted nematic effect (foil = retarder sheet) in-plane switching effects, IPS [4]
The twisted nematic (TN) display is one of the oldest and frequently cheapest kind of liquid crystal display technologies. TN displays have fast pixel response times and less smearing than other types of LCDs like IPS displays, but suffer from poor color reproduction and limited viewing angles, especially in the vertical direction. When viewed ...
On December 4, 1970, the twisted nematic field effect (TN) in liquid crystals was filed for patent by Hoffmann-LaRoche in Switzerland, (Swiss patent No. 532 261 Archived March 9, 2021, at the Wayback Machine) with Wolfgang Helfrich and Martin Schadt (then working for the Central Research Laboratories) listed as inventors. [24]
The molecules are reoriented by an applied electric field, while remaining essentially parallel to the surfaces to produce an image. It was designed to solve the strong viewing angle dependence and low-quality color reproduction of the twisted nematic field effect (TN) matrix LCDs prevalent in the late 1980s. [1]
Twisted Nematic (TN): This type of display is the most common and makes use of twisted nematic-phase crystals, which have a natural helical structure and can be untwisted by an applied voltage to allow light to pass through.
Unlike common TN (Twisted Nematic) or STN (Super Twisted Nematic) liquid crystal displays, guest host displays are typically driven direct, and are not usually multiplex driven. Shtiever 11.01.10 2. In addition, guest host displays usually require higher operating voltages than TN or STN displays.