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液晶是１８８８年由奥地利的Ｆ．Ｒｅｉｎｉｔｚｅｒ发现的．他把各向同性的胆甾醇苯酸酯晶体加热到１４５．５℃时，它熔融成为各向异性的混浊液体．继续升温到１７８．５℃，混浊液体突然变为清亮的液体．这个由混浊到清亮的过程是可逆的．这说明在各向同性的国相和各向同性
The LCD was 1888 by Austria. Found by Reinitzer. He heated the isotropic cholesteryl ester crystal to 145.5 ° C and it melted into an anisotropic cloudy liquid. Continue to heat up to 178.5 ℃, the turbid liquid suddenly become a clear liquid. This process from turbid to clear is reversible. This shows that in the isotropic state and isotropy