how plasma screens work
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2.0 LCD Monitors
2.1 How do LCD Monitors work
LCD Monitors start with a filter. The filter is constructed using two pieces of glass that have polarizing film on one side. On the side of the glass that has no polarizing film there is a special polymer coating that creates microscopic grooves. The grooves on the polymer coating and the polarizing film are placed in the same direction. When the two sheets of glass are arranged at a 90-degree angle from each other light is prevented from penetrating through.
A liquid crystal solution is sandwiched between the two sheets of polarized glass. The liquid crystals are small rod shaped molecules. While there is no electrical current the molecules are in a relaxed state...