Lub Yug Ntawm LCD Screens

Txhawm rau taug qab lub hauv paus chiv keeb ntawm cov kua siv lead ua kua, peb yuav tsum xub pib nrog lub hnub yug ntawm "kua siv lead ua kua". Nyob rau hauv 1888, ib tug Austrian botanist, Friedrich Reinitzer, nrhiav tau ib yam khoom tshwj xeeb. Nws tau rho tawm ib qho chaw hu ua helical benzoate los ntawm cov nroj tsuag. Thaum ua ib qho kev sim cua sov ntawm qhov sib xyaw no, nws pom tsis tau tias qhov sib xyaw no muaj ob lub ntsiab lus melting ntawm qhov kub sib txawv. Nws lub xeev yog nyob nruab nrab ntawm cov kua thiab cov khoom uas peb feem ntau paub txog, me ntsis zoo li cov tshuaj colloidal ntawm soapy dej, tab sis nws muaj cov khoom ntawm ob qho tib si kua thiab crystalline tshuaj nyob rau hauv ib tug tej yam kub thiab txias. Vim nws lub xeev tshwj xeeb, nws tau tom qab lub npe hu ua "Liquid Crystal", uas txhais tau hais tias kua crystalline khoom. Txawm li cas los xij, txawm tias cov kua siv lead ua kua tau tshawb pom thaum ntxov li xyoo 1888, nws tsis yog txog 80 xyoo tom qab ntawd nws tau siv tiag tiag hauv lub neej niaj hnub.