Txhawm rau taug qab lub hauv paus chiv keeb ntawm cov kua siv lead ua kua, peb yuav tsum pib nrog lub hnub yug ntawm "kua siv lead ua kua". Nyob rau hauv 1888, Austrian botanist, Frederick. Friedrich Reinitzer nrhiav tau ib yam khoom tshwj xeeb. Nws tau rho tawm ib qho chaw hu ua spirotoluate los ntawm cov nroj tsuag, thiab thaum ua kev sim cua sov rau qhov sib xyaw no, nws pom 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, uas yog me ntsis zoo ib yam li ib tug colloidal tov ntawm soapy dej, tab sis nws muaj ob qho tib si kua thiab crystalline zog nyob rau hauv ib tug tej yam kub thiab txias. Lub xeev tau tom qab lub npe hu ua "Liquid Crystal", uas txhais tau hais tias cov khoom siv lead ua kua. Txawm li cas los xij, txawm hais tias cov kua siv lead ua kua tau tshawb pom thaum ntxov li xyoo 1888, nws yog 80 xyoo tom qab thaum nws yog qhov siv tau tiag tiag rau cov khoom siv nyob ib puag ncig lub neej.
LCD
Xyoo 1968, ntawm Shanov R&D Center ntawm RCA Corporation (kev tsim khoom ntawm xov tooj cua thiab TV) hauv Tebchaws Meskas, cov kws ua haujlwm tau tshawb pom tias cov kua siv lead ua kua molecules yuav cuam tshuam los ntawm qhov hluav taws xob, hloov lawv cov molecular kev npaj thiab deflecting lub teeb tuaj. Qhov tshwm sim. Siv lub hauv paus ntsiab lus no, RCA tau tsim lub ntiaj teb thawj lub vijtsam siv cov kua siv lead ua kua. Txij thaum ntawd los, kua siv lead ua kua siv tshuab tau siv dav hauv cov khoom siv hluav taws xob, xws li lub laij lej, hluav taws xob saib, xov tooj ntawm tes, cov cuab yeej siv hauv tsev kho mob (vim kev ntsuas hluav taws xob ntsuas hluav taws xob) lossis cov ntxaij vab tshaus ntawm cov koob yees duab digital, thiab lwm yam. Interestingly, qhov kev tshawb pom. cov kua siv lead ua kua yog ua ntej ntawm cov raj nqus tsev lossis cov raj cathode, tab sis tsis muaj coob tus neeg paub txog qhov tshwm sim no kom txog rau thaum 1962. Castellano (Joe Castellano) tau luam tawm cov phau ntawv los piav qhia. Ib yam li cov duab tube, txawm hais tias ob lub thev naus laus zis no tau tsim los ntawm RCA lub tuam txhab hauv Tebchaws Meskas, lawv tau nqa los ntawm Nyiv tuam txhab Sony thiab Sharp feem.
