Super twisted nematic

Supertwisted nematic display, 15 114 Super twisted nematic liquid crystal display (STN-LCD), 9 340 Super ultra-low emissions vehicle (SULEV), 13 855... 

Polymeric side chain Super twisted nematic X-Y Matrix Projection... 

Super-twisted nematic liquid crystal displays (STN-LCDs) 45000000... 

Surface Stabilised Ferroelectric Super Twisted Nematic temperature (degrees centigrade)... 

The first TN-LCD were simple, directly addressed segment displays as still used, e. g., for wrist watches. When attempts were made to increase the information content of the displays by time-sequential addressing in rows and lines (multiplexing) the limits of the TN cell were soon met. At higher multiplex ratios [14] contrast loss occurred, because of ever shorter addressing times. The development of the super-twisted nematic (STN) cell in 1984 [15] pushed the practicable limit to higher multiplex ratios, but it did not lead to a general solution of the problem. 

NFTh N-fluoro benzene-1,2- STN super-twisted nematic... 

In LCDs various LC modes of operation are applied like twisted nematic (TN) [5], super twisted nematic (STN)[6], vertically aligned nematic (VAN) [7,8], optically compensated birefringence (OCB) [9] and in plane switching (IPS) [10-12]. The LC mode used depends on the demands of a specific application, like the viewing angle, power consumption and manufacturing cost. 

T. Scheffer and J. Nehring, Twisted nematic and super-twisted nematic mode LCDs, in Liquid crystals -applications and uses, Vol. 1, ed. by B. Bahadur (World Scientific, New Jersey, 1990). 

Compared to the conventional transmissive TN LCD, the above transflective TN LCD only requires one additional transflector between the bottom polarizer and the TN LC layer. Naturally, this transflective LCD device configuration can also be extended to an STN-based transflective LCD [42]. In contrast to the so-called polarization rotation effect in TN LCD, the STN LCD uses the birefringence effect of the super-twisted nematic LC layer [43]. Therefore, a larger twist angle (180 270°), a thicker LC cell gap, and a different polarizer/analyzer configuration are required. 

These orientations are classified into two groups. The directors of the liquid crystal molecules in the Homogeneous, Tilted and Homeotropic cases are aligned in one fixed direction, while, the director of the liquid crystal molecules in the Splay, Twist, Bend, Hybrid and Super-twisted nematic cases are not fixed in one direction. In the latter orientations, the liquid crystals are under stress. 

Super-twisted nematic (STN) Retardation 2 As > 0 Twist (> 90 °) Perpendicular to substrate surface... 

More advanced LCDs take advantage of so-called super-twisted nematic displays, in which the director rotates 270° between the two polarizers. This leads to a crisper distinction between on and off states. Color LCDs simply include appropriate dyes to make red, green, and blue (RGB) pixels—simple in principle but a fairly complex technology. 

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