Ib, qhov kub thiab txias ib puag ncig: Cov kua siv lead ua kua molecules 'khov' ua rau cov lus teb qeeb
1. Sudden hloov nyob rau hauv viscosity ntawm cov khoom siv lead ua kua
Lub hauv paus ntsiab lus ntawm cov ntsiab lus ntawm lub LCD tawg yog los tswj cov txheej txheem ntawm cov kua siv lead ua kua molecules los ntawm ib qho hluav taws xob teb, yog li hloov lub transmittance ntawm lub teeb. Nyob rau hauv qhov kub thiab txias ib puag ncig qis dua -20 degree, viscosity ntawm cov ntaub ntawv siv lead ua kua nce siab, thiab kev tiv thaiv rau molecular rotation nce. Noj TN hom kua siv lead ua piv txwv, nws lub sijhawm teb (lub sijhawm hloov pauv ntawm qhov tsaus ntuj mus rau qhov kaj lossis ci rau tsaus) yog li 50-100ms ntawm chav tsev kub, tab sis thaum kub poob mus rau -30 degree, lub sij hawm teb yuav txuas ntxiv mus rau ntau tshaj 500ms, uas ua rau pom tseeb tailing ntawm cov ntsiab lus tso tawm.
2. Tsav tsheb voltage pib drift
Ntawm qhov kub thiab txias, qhov dielectric tas li (Δ ε) thiab birefringence (Δ n) ntawm cov khoom siv lead ua kua hloov pauv, ua rau muaj kev cuam tshuam ntawm kev tsav tsheb. Piv txwv li, 1/4 Duty disconnect screen siv nyob rau hauv ib qho kev lag luam ntsuas yuav tsum tau 3.3V voltage tsav ntawm chav tsev kub, tab sis yuav tsum tau nce mus rau 5.0V ntawm -25℃kom ua tau raws li qhov sib piv piv. Yog tias qhov kev tsav tsheb tsis hloov pauv hloov pauv, qhov hluav taws xob tsis txaus yuav ua rau cov lus teb qeeb.
3. Lub cev muaj zog kev puas tsuaj
Thaum raug kub tsis txias rau lub sijhawm ntev, cov iav substrate thiab cov kua siv lead ua kua yuav muaj kev ntxhov siab vim qhov sib txawv ntawm thermal expansion thiab contraction coefficients, uas yuav ua rau ITO electrode puas los yog orientation txheej puas. Ib qho khoom siv tshawb nrhiav roj tau pom tias muaj qhov tsaus ntuj mus tas li ntawm qee ntu tom qab ua haujlwm tas li rau 72 teev thaum lub sijhawm ntsuas -40 degree, uas tau kuaj pom los ntawm electrode kab tawg.
2, Qhov kub thiab txias ib puag ncig: molecular thermal motion poob ntawm kev tswj ua rau kev ua haujlwm tawg
1. LCD theem hloov tsis ua hauj lwm
Thaum qhov kub siab tshaj qhov Clearing Point ntawm cov khoom siv lead ua kua, cov kua siv lead ua kua hauv lub xeev yuav hloov mus rau hauv lub xeev isotropic kua, poob nws lub peev xwm kho qhov muag. Piv txwv li, lub ntsiab lus meej ntawm ib txwm STN LCD yog li 70℃. Yog hais tias qhov kub ntawm ambient mus txog 85 degree, qhov screen yuav tshwm tag nrho dub los yog dawb thiab tsis tuaj yeem pom ib txwm. Txawm hais tias lub sijhawm hloov pauv kub tsis ncav cuag, qhov kub thiab txias tuaj yeem ua rau muaj kev tsis sib haum xeeb hauv kev teeb tsa ntawm cov kua siv lead ua kua molecules, ua rau muaj qhov sib txawv thiab cov duab seem.
2. Kev tsis sib haum ntawm kev tsav tsheb tsis sib xws
Nyob rau hauv qhov kub thiab txias, qhov pib voltage ntawm tus tsav IC yuav drift vim kev hloov ntawm cov yam ntxwv semiconductor. Thaum kuaj xyuas kev kho mob hauv ib puag ncig 50 degree, nws tau pom tias qhov sib txawv ntawm qhov sib txawv ntawm qhov tawg code screen tau hloov los ntawm 1/3 ntawm tus qauv tsim mus rau 1/2, uas ua rau muaj qhov txawv txav ntawm qee cov kab lis kev cai. Tsis tas li ntawd, qhov kub thiab txias tuaj yeem ua rau kom muaj kev laus ntawm electrolytic capacitors, ua rau muaj zog ripple ntxiv thiab cuam tshuam nrog kev ruaj ntseg.
3. Efficiency attenuation ntawm backlight system
Lub luminous efficiency ntawm LED backlight ho txo qis ntawm qhov kub thiab txias. Noj ib qho khoom siv HMI ua piv txwv, nws lub teeb pom kev zoo muaj qhov ci ntawm 500cd / m ² ntawm 25 degree, tab sis thaum qhov kub thiab txias nce mus txog 60 degree, qhov ci ntsa iab txo mus rau 320cd / m ², thiab xim kub hloov los ntawm ntau dua 1000K, ncaj qha cuam tshuam rau cov duab pom tseeb.
3, Kev daws teeb meem kev lag luam: Ntau qhov kev siv thev naus laus zis
1. Khoom siv tshiab: dav kub LCD qauv
Los ntawm kev qhia ntau cov fluorinated benzene nplhaib cov qauv, cov viscosity rotational (₁) ntawm cov kua muaju tuaj yeem txo qis. Piv txwv li, WF-HT series kua siv lead ua cov khoom tsim los ntawm qee cov chaw tsim khoom muaj lub sijhawm teb 40% luv dua li cov ntaub ntawv ib txwm muaj ntawm -40℃, thiab cov ntsiab lus meej tau nce mus rau 105℃, ua tau raws li qhov xav tau ntawm kev lag luam dav dav. Tsis tas li ntawd, kev siv lub Δ ε / Δ n txuam tsim muaj peev xwm tswj tau qhov ruaj khov electro-optical nkhaus thoob plaws qhov kub thiab txias thiab txo qhov cuam tshuam ntawm greyscale.
2. Tsav optimization: adaptive voltage tswj
Tsim kom muaj qhov ntsuas kub ntawm qhov ntsuas hluav taws xob ua haujlwm, saib xyuas qhov ntsuas kub ntawm lub sijhawm tiag tiag- lub sijhawm los ntawm kev sib xyaw ua ke digital kub sensors (xws li MAX31875), thiab dynamically kho Vop (tsav voltage amplitude) thiab kev tsis ncaj ncees piv. Tom qab siv cov tswv yim no, ib qho cuab yeej aviation tau ua tiav qhov kev hloov pauv ntawm ntu cov lus teb lub sij hawm nyob rau hauv ± 15% thiab 30% kev txhim kho nyob rau hauv qhov sib piv stability nyob rau hauv thaj tsam ntawm -30℃mus rau 85 degree.
3. Kev Tiv Thaiv Kev Tiv Thaiv: Kev Tswj Xyuas Kev Kub Kub Ua Ke
Tsawg kub preheating: Txuas ITO pob tshab cua sov zaj duab xis rau sab nraum qab ntawm LCD, thiab siv PWM tswj kom ua tiav cov cua sov. Ib qho khoom siv tshawb fawb txog kev tshawb fawb txog keeb kwm yav dhau los siv cov thev naus laus zis no, uas tuaj yeem nce qhov ntsuas kub mus rau -10℃hauv 90 vib nas this hauv ib puag ncig ntawm -45 degree, thiab tom qab ntawd teeb tsa ib txwm.
Kub kub dissipation: siv graphene tshav kub dissipation fins thiab tooj liab ntawv thermal conductivity qauv kom sai sai dissipate tshav kub los ntawm lub backlight module. Cov ntaub ntawv ntsuam xyuas qhia tau hais tias qhov kev daws teeb meem no tuaj yeem txo qhov kub ntawm qhov sib txuas ntawm LED los ntawm 15℃thiab ncua nws txoj sia los ntawm 2 zaug.
Sealing tsim: Los ntawm epoxy resin encapsulation thiab ya raws -cov pov thawj txheej, nws tiv thaiv Circuit Court luv Circuit Court tshwm sim los ntawm dej vapor infiltration. Ib qho khoom siv saib xyuas dej hiav txwv tau ua haujlwm tsis tu ncua hauv ib puag ncig nrog cov av noo ntawm 95% rau ib xyoos yam tsis muaj kev ua haujlwm tsis zoo.
4, Cov ntaub ntawv thov raug
1. Cov cuab yeej tshawb nrhiav roj av
RTU maub los ntawm qee qhov chaw roj yuav tsum ua haujlwm ruaj khov hauv ib puag ncig ntawm -40℃txog 70 degree. Los ntawm kev siv cov khoom siv ua kua siv lead ua dav dav, kev hloov pauv kev tsav tsheb, thiab kev tswj hwm qhov teeb pom kev zoo, peb ua tiav:
Lub sij hawm teb qhov kub thiab txias: txo los ntawm 800ms hauv cov kev daws teeb meem rau 320ms
Qhov sib piv ntawm qhov kub thiab txias: tswj 800: 1 ntawm 70℃(txoj kev daws teeb meem yog 500: 1)
Backlight lifespan: ncua mus rau 50000 teev (cov tshuaj ib txwm yog 15000 teev)
2. Aerospace instruments
Lub chaw nres tsheb hauv av qhia tau hais tias lub davhlau ya nyob twg yuav tsum tiv taus qhov kub thiab txias sib txawv ntawm -45℃txog 85 degree. Los ntawm kev qhia txog kev ua qauv ntawm thermodynamic simulation los ua kom zoo tshaj qhov kev npaj ntawm cov kua siv lead ua kua molecules thiab kev sib koom ua ke cua sov zaj duab xis thiab cov cua kub dissipation raws, peb tuaj yeem ua tiav:
Lub sij hawm pib txias: txo los ntawm 120 vib nas this mus rau 45 vib nas this
Kev ntsuas kub siab: dhau 1000 lub voj voog ntawm -45℃txog 85℃yam tsis ua haujlwm
Kev siv hluav taws xob: txo los ntawm 35% piv rau cov kev daws teeb meem ib txwm muaj
