In 1888, Austria scientist called lainicier, a strange organic compound is synthesized, it has two melting points. Solid Crystal when heated to 145 degrees it will melt into a liquid, just cloudy, but all pure substances melt is transparent.
If you continue heating to 175 c, once again, it seems to be melting into a clear liquid. Later, Germany lieman, a physicist in the "Middle Belt" of cloudy liquid called LCD. It is not like a horse, and not like an ass's Mule, and the Mule so some people call it organic.
Liquid crystal was discovered, people don't know what it is, until 1968, when people use it as electronic industries material.