Liquid Crystals Revisited

As I described in the April Light Touch column (page 58), liquid crystal materials are beginning to be used in an ever-increasing number of applications. I started with the properties of liquid crystals in general, and then quickly discussed the most common liquid crystal application—twisted nematic displays. These displays are used in many applications, ranging from clocks and watches to portable laptop computers. This column describes a different kind of liquid crystal—the kind used to make unbreakable fever thermometers.

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