Cov kua siv lead ua kua tau pom thawj zaug los ntawm Austrian botanist F. Reinitzer hauv xyoo 1888. Thaum nws ntsuas cov ntsiab lus melting ntawm cov organic teeb meem, nws pom tias qee cov organic tshuaj (cholesteric benzoates thiab acetates) melted thiab tom qab ntawd ntsib qhov melting point. Nws yog opaque dawb thiab cloudy kua xeev, thiab muab cov yeeb yuj thiab zoo nkauj pearl luster, thiab yuav tsuas yog pob tshab thiab ntshiab kua thaum nws yog rhuab mus rau ib tug tej yam kub. Xyoo tom ntej, tus kws kho mob German O. Lehmann tau siv nws tus kheej tsim los soj ntsuam cov lipid compounds raws li lub xeev-of-the-art polarizing microscope nrog lub tshuab cua sov. Nws pom tias hom dej dawb, turbid kua, txawm tias cov kua hauv qhov tsos, pom cov yam ntxwv birefringence ntawm anisotropic crystals. Yog li ntawd, Lehman tau muab nws lub npe hu ua "kua siv lead ua kua," uas yog qhov chaw lub npe "siv lead ua kua"los ntawm.
Cov kua siv lead ua kua yog cov organic sib xyaw nrog kev sib xyaw molecular tsis tu ncua ntawm cov khoom thiab cov kua. Feem ntau, feem ntau siv cov kua siv lead ua kua yog cov kua siv lead ua nematic, thiab cov duab molecular yog ib qho elongated pas nrig zoo nrog qhov ntev thiab dav ntawm li 1 nm mus rau 10 nm ntawm qhov sib txawv tam sim no. Nyob rau hauv qhov kev txiav txim ntawm hluav taws xob teb, cov kua siv lead ua kua molecules yuav ua ib tug tsis tu ncua kev sib hloov ntawm 90 degrees, uas ua rau ib tug sib txawv ntawm transmittance, yog li ntawd nyob rau hauv lub hwj chim ON / OFF nyob rau hauv qhov sib txawv ntawm lub teeb thiab ntxoov ntxoo, raws li txoj cai no. tswj txhua pixel, koj tuaj yeem tsim cov duab xav tau.
Qhov txawv ntawm lcd thiab lcm
LCD qhia
LCD yog cov ntawv luv ntawm Lus Askiv Liquid Crystal Display, uas yog cov kua siv lead ua kua, nws yog ib hom kev siv tshuab digital, tuaj yeem lim lub teeb ci los ntawm cov kua siv lead ua kua thiab xim lim, tsim cov duab ntawm lub vaj huam sib luag. Piv nrog rau cov tsoos cathode ray tube (CRT), lub LCD muaj cov hneev taw me me, siv hluav taws xob tsawg, hluav taws xob tsawg, tsis muaj flicker, thiab txo qhov pom kev qaug zog. Tsis txaus: Piv nrog rau tib qhov loj CRT, tus nqi kim dua.
Tom qab xyoo dhau los ntawm kev coj noj coj ua hauv kev lag luam phau ntawv computer, cov ntxaij vab tshaus zoo raws li LCD thev naus laus zis tau maj mam nkag mus rau lub lag luam desktop. LCD muaj ntau yam zoo uas cov tsoos CRT zaub tshuab tsis muaj, nws tuaj yeem muab cov ntawv nyeem kom meej dua, thiab lub vijtsam tsis muaj flicker, uas tuaj yeem txo qhov pom kev qaug zog los ntawm kev saib lub vijtsam ntev. Lub thickness ntawm LCD zaub feem ntau tsis ntau tshaj 10 ntiv tes, yog li yog tias lub desktop siv lub tshuab LCD, nws yuav txuag tau ntau qhov chaw. Txawm hais tias LCD zaub muaj nws qhov tshwj xeeb zoo nkauj, nws yog qhov tsis lees paub tias LCD tseem muaj qhov tsis zoo hauv cov xim zoo nkauj piv nrog cov neeg sib tw tseem ceeb CRT zaub. Tsis tas li ntawd, qhov sib txawv ntawm tus nqi dav ua rau LCD tseem tsuas yog cov khoom kim heev nyiam los ntawm ob peb tus neeg.
LCM yog dab tsi
LCM English lub npe Liquid Crystal Display Module, LCD zaub module, LCD module, hais txog cov kua siv lead ua kua zaub ntaus ntawv, connectors, tswj thiab tsav peripheral circuits, PCB Circuit Court board, backlight source, structural Cheebtsam thiab lwm yam khoom ua ke.
Qhov txawv ntawm lcd thiab lcm
Qhov txawv ntawm lcd thiab lcm
Lub LCD yog lub npe luv rau Liquid Crystal Display. Yuav kom muab tso ncaj, nws yog ib tug saib.
Lub LCD yog cov zaub (lcd LCD). Lub LCM yog ib qho kev sau los ntawm ntau yam khoom siv xws li LCD thiab nti, lub rooj tsav xwm hauv Circuit Court, thiab cov zoo li uas tswj cov zaub hom thiab cov ntsiab lus ntawm LCD. Nws tuaj yeem hais tias LCD yog pem hauv ntej ntawm cov ntsiab lus zaub, thiab LCM yog tag nrho cov kev khiav hauj lwm nrog rau lub rooj sab hauv.
1, LCD=Crystal Display
2. Feem ntau yog hais txog: LCD vaj huam sib luag, suav nrog polarizer, xim lim, kua siv lead ua iav (iav clip kua siv lead ua), TFT tswj qhov chaw
3, LCM=Liquid Crystal Module LCD module
4, suav nrog: LCD vaj huam sib luag thiab cov khoom siv hauv qab no, feem ntau yog lub teeb pom kev zoo, lub teeb ci ua kom pom tseeb, cov yeeb yaj kiab translucent, cov yeeb yaj kiab zoo, cov yeeb yaj kiab diffusion, bracket, LED teeb (lub teeb ci), FPC thiab cov khoom siv tiv thaiv.
5. Qhov tseeb, feem ntau, ob leeg saib tib lub ntsiab lus.
Qhov sib txawv tseem ceeb ntawm LCD thiab LCM yog:
1, LCM nrog lub tsev qiv ntawv cim; LCD tsis nqa lub font.
2, LCD yog cov kua siv lead ua kua, feem ntau yog hais txog ib qho screen cais; LCM yog cov kua siv lead ua kua zaub module, uas suav nrog cov tsav tsheb sib txuas thiab tswj Circuit Court, tuaj yeem txuas ncaj qha nrog microcontroller.
Lub LCD module tsuas yog lub vijtsam LCD + LED backlight board + PCB board + hlau ncej. Modules feem ntau muab faib ua cov tshuaj ntsuam thiab backlight Cheebtsam. Ob qhov chaw tau sib sau ua ke, tab sis lawv ua haujlwm ntawm ib leeg (uas yog, circuits tsis cuam tshuam). Lub hauv paus ntsiab lus ntawm cov kua siv lead ua kua yog tias lub teeb ci ntsa iab ntawm lub teeb ci ntsa iab thiab lub teeb kis tau los ntawm LCD rau peb lub qhov muag. Lub luag haujlwm ntawm lub vijtsam yog ua cov teeb ci no los ntawm pixels los tso saib cov duab.
