How are liquid crystals used?
Liquid crystals are a state of matter somewhat like a liquid and somewhat like a crystal. The optical characteristics of liquid crystals can be quickly and accurately changed by the application of various forms of energy. This makes liquid crystals useful in a number of applications.TypesLiquid crystals can often show us invisible natural forces. Some liquid crystals react to electricity, temperature, and stress–making these forces visible. Other forms of liquid crystals have other non-optical properties (such as the ability to remember complex patterns) that can be exploited for technological purposes.Optical DisplaysThe most common application of liquid crystal technology is the liquid crystal display screens on computers and televisions. A thin layer of electrically sensitive liquid crystal is contained between polarized sheets and electrical grids. Electrical signals are used to change the color of each pixel on the screen 30 times a second.Temperature IndicatorsLiquid crystals th
