Vertically aligned mode

The same phenomenon occurs if the liquid crystal has a negative dielectric anisotropy and the applied field is along the z direction (known as the vertical alignment mode), where the electric energy is... 

K. Ohmuro, S. Kataoka, T. Sasaki, and Y. Koike, Development of super-high-irrrage-quality vertical alignment-mode LCD, SID Tech. Digest 28, 845 (1997). 

In the vertically aligned mode (VA mode), the long axis of rodlike hquid crystal molecules is oriented perpendicular to the glass substrate. In general, nematic liquid crystals with a negative anisotropy of the dielectric constant are used. 

In the vertical alignment mode, based on the experience in TN-t) e displays, a wide viewing angle characteristic was tried to develop from the beginning on the assumption of using the aforementioned domain dividing. 

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. 

S. H. Lee, K. H. Park, J. S. Gwag, et al., A multimode-type transfleetive liquid crystal display using the hybrid-aligned nematic and parallel-mbbed vertically aUgned modes, Jpn. J. Appl. Phys., part 1, 42, 5127 (2003). 

For the VA mode or MVA mode, vertical alignment is realized by using polymer materials without prior rubbing treatment. 

Vertical Alignment (VA) Mode and Multi-domain Vertical Alignment (MVA) Mode... 

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