Analog Gray Levels

How to produce analog gray levels in an SSFLC display is perhaps not so evident, because the electrooptic effect offers two optical states, hence it is digital. Nevertheless, the shape of the hysteresis curve reveals that there must be small domains with a slightly varying threshold, in some analogy with the common ferromagnetic case. Normally, however, the flank of the curve is not sufficiently smeared out to be controlled and to... 

Figure 13.4. Valence orbitals of a tricoordinated metal A (longer gray bracket) is analogous to . The splitting of the upper levels (shorter gray bracket) is a measure of the trans effect.

Even if some mechanistic background allows a deeper interpretation of the parameters so that they have more biological significance, with such an approach gray boxes still remain the approach is still, more or less, an optical illusion (Rods and Kossen, 1978), since the final subsystems are always black boxes. In conclusion, the level of modeling to be considered as adequate depends on the principle of analogy, in which the model parameters are adapted to experiments ( adaptational parameters, according to Hofmann, 1975). 

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