Positive Mode Phase Change Dichroic LCDs

5 Positive Mode Phase Change Dichroic LCDs 

The molecular structure of a long-pitch cholesteric mixture is determined both by the cell gap and the type of alignment [13 -16]. If the cell gap is sufficiently large, the structure is always helicoidal in the bulk of the layer, irrespective of the homeotrop-ic or homogeneous alignment on the surface [13-16]. If the cell gap is below a critical thickness d, where 

Two versions of cells using this property have been proposed using a pleochroic dye 

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