The pixel structures of UB-FFS technology exactly match those of FFS. However, the preferred orientation in UB-FFS is virtually perpendicular to the strip-type pixel electrodes, being rotated by 90° in comparison to FFS. The same is true of the orientation of the polarizers. In addition, liquid crystal materials with negative dielectric anisotropy are used. The electrical dipole moment shoos almost perpendicular to the molecular axis.
In the “off” state the molecules are aligned perpendicular to the electrode in the plane. In the “on” state the molecules switch parallel to the electrode within the plane owing to the vertical dipole moment. All in all the molecules are able to remain better in the plane and will line up much less along the electrode edges compared to FFS technology. As the result they will allow a significantly higher light transmittance per pixel.
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