Ib, Technical yam ntxwv thiab cov av noo rhiab ntsiab lus ntawm segmented LCD
Segmented LCD qhia los ntawm kev tswj cov twisting ntawm cov kua siv lead ua kua molecules los ntawm electrodes, thiab nws cov qauv tseem ceeb muaj xws li iav substrate, ITO conductive txheej, kua siv lead ua khoom, thiab polarizer. Cov qauv no yog qhov tseem ceeb rau cov av noo hauv ob yam:
Kev nqus dej noo ntawm cov ntaub ntawv: Cov ntaub ntawv siv lead ua kua muaj cov polar pawg xws li esters thiab ethers, uas yog nquag nqus dej thiab nthuav tawm thaum cov av noo tshaj 80% RH, ua rau muaj kev cuam tshuam ntawm molecular, ua rau pom qhov muag tsis pom, txo qhov sib piv, thiab txawm tias lub vijtsam dub.
Corrosion ntawm conductive txheej: ITO (indium tin oxide) conductive txheej yog nquag ua rau cov dej molecules tsim indium hydroxide nyob rau hauv ib puag ncig ntub, ua rau muaj zog electrode kuj thiab tso saib code breakage los yog flickering.
Cov xwm txheej: Tom qab siv qee yam khoom siv saib xyuas dej hiav txwv hauv thaj chaw ntsev tsuag rau 3 lub hlis, ntu ntu code LCD npo tshwm ib nrab dub. Tom qab kev sim, nws tau pom tias ntug ntawm lub polarizer tau o vim qhov nqus dej noo, ua rau kev sib cais ntawm cov kua siv lead ua kua txheej. Nyob rau tib lub sijhawm, ITO electrode tau corroded los ntawm ntsev tsuag, tsim ib txoj kev conductive thiab ua rau luv luv Circuit Court.
2, Humidity kam rau ua txwv thiab kev lag luam qauv ntawm segmented LCD
Raws li kev soj ntsuam kev lag luam cov ntaub ntawv, tsis muaj kev tiv thaiv ntu code LCDs tuaj yeem ua haujlwm ruaj khov raws li cov hauv qab no:
Upper humidity limit: 90% RH (lub sij hawm luv - raug)
Qhov kub thiab txias: -30℃rau +85℃(dav kub qauv)
Kev tiv thaiv qib: IP54 (plua plav pov thawj)
Txawm li cas los xij, nyob rau hauv cov xwm txheej muaj tiag, cov av noo feem ntau yog nrog los ntawm cov khoom sib xyaw xws li qhov kub thiab txias, tshuaj tsuag ntsev, thiab roj paug, txo qhov kev ua siab ntev. Piv txwv li:
Kev kub ceev caij tsheb kauj vab: Hauv -40℃mus rau +85℃kev caij tsheb kauj vab, qhov tsis raug kaw ntu code LCD pom cov polarizer tev tawm tom qab 10 lub voj voog.
ntsev tsuag corrosion: Nyob rau hauv 5% NaCl tov tshuaj tsuag ib puag ncig, tus nqi corrosion ntawm ITO electrode nce mus txog 0.1 μ m / hnub, thiab qhov tsis kam nce 30% tom qab 20 hnub.
Kev lag luam tus qauv: Tub rog qib ntu code LCDs yuav tsum xeem dhau qhov ntsuas kub damp (85℃/ 85% RH / 48 teev) hauv GJB 150A-2009 tus qauv, thaum cov neeg siv khoom qib feem ntau tsuas yog ua tau raws li qib IP54 ntawm IEC 60529.
3, Kev tiv thaiv technology system nyob rau hauv high humidity ib puag ncig
Txhawm rau txhim kho cov dej noo tsis kam ntawm segmented LCD, kev lag luam tau tsim ntau yam - qib tiv thaiv kev daws teeb meem:
1. Kev tsim qauv sealing
Tag nrho cov tshuab lamination: OCA optical nplaum los yog LOCA kua nplaum yog siv los ua kom tag nrho cov kev sib txuas ntawm lub vijtsam kov thiab LCD, tshem tawm cov huab cua txheej thiab tiv thaiv cov hws sab hauv. Piv txwv li, qee qhov kev lag luam handheld davhlau ya nyob twg tau nce nws lub peev xwm los tiv thaiv condensation los ntawm 5 zaug los ntawm kev siv tshuab lamination tag nrho, thiab tsis muaj qhov txawv txav nyob rau hauv qhov kub sib txawv ntawm -20℃rau +70℃.
Sealing nplhaib khoom siv: EPDM roj hmab los yog fluorosilicone roj hmab sealing nplhaib yog siv, nrog ib tug hardness tswj ntawm 40-60 ntug dej hiav txwv A thiab ib tug ua ntej compression shrinkage ntawm 15% -30% los xyuas kom meej lub sij hawm ntev rebound nyob rau hauv kub thiab high humidity. Tom qab qee cov khoom siv roj drilling tau ntim nrog fluorosilicone roj hmab, nws ua haujlwm tsis tu ncua rau 2 xyoos hauv ib puag ncig ntawm 120℃/ 95% RH yam tsis muaj dej nkag.
2. Khoom siv kho mob
Hydrophobic coating: Spraying fluoride (such as Cytop solution) on the surface of a glass substrate to form a hydrophobic film with a contact angle>110 degree, ua rau cov tee dej dov tawm hauv cov duab kheej kheej ntawm qhov chaw. Cov kev ntsuam xyuas tau pom tias cov segmented LCD tom qab txheej txheej kho tau 90% txo qis hauv cov dej ingress tus nqi hauv IPX6 tshuaj tsuag.
Kev tiv thaiv txheej txheem: Deposition ntawm SiO ₂ lossis Al ₂ O3 passivation txheej ntawm ITO electrode, nrog lub thickness ntawm 50-100nm, tuaj yeem thaiv kev nkag mus ntawm cov dej molecules. Ib yam khoom siv kho mob tau txuas ntxiv cov electrode lifespan los ntawm 3 xyoo mus rau 8 xyoo los ntawm cov txheej txheem no.
3. Kev tswj hwm ib puag ncig
Daim ntawv thov ntawm desiccant: Molecular sieve desiccant tau muab tso rau hauv LCD rov qab vaj huam sib luag, nrog lub peev xwm nqus dej noo ntawm 20% ntawm nws tus kheej qhov hnyav, uas tuaj yeem tswj cov av noo ntawm lub chamber hauv qab 40% RH. Ib qho cuab yeej sab nraum zoov txais yuav tus qauv tsim dual desiccant thiab ua haujlwm tsis tu ncua rau 60 hnub yam tsis muaj qhov txawv txav thaum lub caij los nag.
Intelligent heating and dehumidification: PTC heating elements are integrated on the back of the LCD, which automatically start when the humidity sensor detects RH>75%, thiab txo cov av noo los ntawm cua sov. Tom qab siv cov tswv yim no, qhov kev ua tsis tiav ntawm qhov ntsuas cua txias tau txo qis los ntawm 85%.
4, Cov xwm txheej ntawm daim ntawv thov thiab kev txheeb xyuas qhov ua tau zoo
1. Marine ib puag ncig xyuas cov khoom siv
Ib tug tob -sea detector yuav tsum tau ua hauj lwm nyob rau hauv ib puag ncig nrog ib tug ntsev tsuag concentration ntawm 5% rau 5 xyoo, xws li los ntawm -2℃mus rau +40℃. Ntu code LCD txais cov kev tiv thaiv hauv qab no:
Kev sib koom ua ke tag nrho + fluorosilicone roj hmab sealing nplhaib
Ob chav sided hydrophobic txheej ntawm iav substrate
Sau cov kab noj hniav nrog molecular sieve desiccant
Tom qab 18 lub hlis ntawm kev ua haujlwm tas li nyob rau hauv ib puag ncig marine simulated, nws tau pom tias qhov sib piv tsuas yog txo qis los ntawm 5% thiab tsis muaj qhov tshwm sim ntawm corrosion lossis luv Circuit Court.
2. Tswj cov cuab yeej hauv kev cob qhia tshuaj
Lub reactor tswj cov cuab yeej ntawm qee cov nroj tsuag tshuaj yuav tsum tau ua haujlwm ruaj khov hauv cov roj corrosive ntawm 60℃thiab 90% RH. Ntu code LCD tiv thaiv txheej txheem suav nrog:
Deposition ntawm Al ₂ O3 passivation txheej rau saum npoo ntawm ITO electrode
Backboard integrated PTC cua sov thiab dehumidification system
Tsis siv neeg ua 10 feeb ntawm siab- qhov kub thiab txias (80 degree) txhua lub lim tiam
Cov cuab yeej no tau ua haujlwm tsis tu ncua rau 3 xyoos, nrog rau qhov tsis ua haujlwm tsuas yog 1/5 ntawm cov khoom zoo sib xws.
