AFLC materials

In the sections on smectic liquid crystals, first the alignment and molecular orientation of surface stabilized ferroelectric liquid crystals (SSFLCs) are treated in detail. Next, the alignment technologies needed for the occurrence of bistability are detailed. Furthermore, liquid crystalline devices made of AFLC materials and the applications of FLC and AFLC materials to active matrix devices are discussed. 

To obtain high contrast, AFLC alignment without defects must be realized. Moreover, to realize the stable grey scale expression of the high duty ratio by simple matrix driving, large hysteresis and sharp threshold characteristics are indispen-sible. These characteristics are determined not only by the AFLC material properties, but also by the quality of the alignment states. 

Application of FLC/AFLC Materials to Active matrix Devices... 

In order to determine the specification of Pg and Vsat fo " FLC or AFLC materials, this calculation is not sufficient and it is necessary to raise the accuracy. However, in order to simplify the argument here, the equation for the rough approximation will be used. To obtain a complete response, the resultant pixel voltage Vpix should be larger than the saturated voltage Vgat of the FLC or AFLC materials. 

Figure 6.3.5 shows the relationship of equation 4. The FLC or AFLC materials with Pg and Vgat shown in the shadowed part can attain complete response. 

Thus, an induction period was necessary to identify the antiferroelectric structure after the synthesis of the AFLC materials and the discovery of some characteristic features. This period was required to justify the incompatibility of the antiferroelectric structure with the molecular arrangement in... 

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