Ib, Cov khoom tsis xws luag: Lub cev puas tsuaj rau cov kua siv lead ua kua thiab polarizer
1. Cov kua siv lead ua kua txheej: qhov tshwm sim ncaj qha ntawm iav substrate rupture
Cov qauv tseem ceeb ntawm lub LCD tawg yog ob - txheej iav substrate sandwiching ib txheej kua siv lead ua kua. Yog hais tias lub iav tawg vim muaj kev cuam tshuam sab nraud (xws li ntog los yog squeezing), cov kua siv lead ua kua molecules yuav tawm los ntawm qhov chaw puas, ua rau hauv zos lossis tag nrho blackening. Hom kev ua haujlwm tsis zoo no feem ntau yog nrog cov iav tawg, thiab qhov chaw xau yuav kis tau raws sijhawm. Piv txwv li, ib qho kev lag luam siab transmitter muaj nws lub vijtsam compressed vim lub ntim tsis raug thaum lub sij hawm thauj mus los, ua rau cov kab nrib pleb ntawm lub khob ntug thiab thaj ua rau thaj dub tsim tom qab lub LCD leaked. Thaum kawg, tag nrho cov zaub module yuav tsum tau hloov.
2. Polarizer aging: dual tawm tsam ntawm ultraviolet hluav taws xob thiab kub kub
Polarizing zaj duab xis yog ib qho tseem ceeb tivthaiv uas tswj cov kis ntawm cov kua siv lead ua kua, thiab nws cov kev ua tau zoo cuam tshuam rau qhov sib piv ntawm qhov screen. Yog tias UV tiv thaiv qhov ntsuas ntawm lub polarizer tsis txaus (xws li tsis siv UV resistant txheej), ntev - lub hnub raug tshav ntuj yuav ua rau kev laus zuj zus, ua rau txo qis hauv kev xa tawm thiab lub vijtsam dub. Ib qho kev ntsuas sab nraum zoov siv cov yeeb yaj kiab polarizing zoo tib yam. Tom qab siv nws nyob rau hauv qhov kub thiab txias nyob rau hauv lub caij ntuj sov rau 3 lub hlis, lub ntug ntawm lub screen tshwm blackened, uas tau pom los ntawm cov deposition ntawm polarizing zaj duab xis decomposition khoom.
3. Ua tsis tiav ntawm sealant: pom tsis pom killer ntawm dej vapor nkag
Lub sealant rau LCD nrog cov lej tawg yog siv los cais cov dej vapor thiab impurities. Yog tias muaj qhov tsis xws luag hauv cov txheej txheem sealing (xws li cov nplaum txheej tsis sib xws lossis kev kho tsis tiav), dej vapor yuav nkag mus rau cov kua siv lead ua kua, ua rau muaj teeb meem hauv qab no:
Cov kua siv lead ua kua molecule hydrolysis: Dej vapor reacts nrog cov ntaub ntawv siv lead ua kua los tsim cov tshuaj acidic, corroding ITO conductive txheej thiab ua rau cov zaub hauv zos txawv txav;
Polarizing zaj duab xis delamination: Dej vapor cais cov zaj duab xis polarizing los ntawm iav substrate, ua npuas lossis cov pob dub.
Ib qho kev saib xyuas kev kho mob muaj thaj tsam dub loj ntawm qhov screen tom qab 6 lub hlis ntawm kev siv nyob rau hauv ib qho chaw ntub dej vim tsis zoo sealant zoo. Thaum disassembly, nws tau pom tias LCD txheej tau ua huab thiab blackened.
2, Circuit Court tsis ua hauj lwm: cuam tshuam ntawm lub hwj chim thiab tsav teeb liab
1. Backlight Circuit Court tsis ua hauj lwm: saw cov tshuaj tiv thaiv ntawm LED teeb sawb thiab tsav IC
Lub backlight module ntawm lub LCD disconnected feem ntau yog tsim los ntawm LED teeb strips thiab tsav ICs. Yog hais tias tus tsav tsheb IC raug kaw vim muaj kev tiv thaiv overheating (xws li ntev - lub sij hawm ua haujlwm siab brightness) los yog voltage fluctuations (xws li lub hwj chim module tsis ua hauj lwm), lub vijtsam yuav tshwm dub tag vim tsis muaj teeb pom kev nkag mus rau cov kua siv lead ua kua. Ib qho kev tswj hwm kev lag luam feem ntau ntsib cov ntxaij vab tshaus dub hauv qhov kub thiab txias thaum lub caij ntuj sov. Tom qab kev sim, nws tau pom tias tus tsav tsheb backlight IC nkag mus rau kev tiv thaiv hom vim overheating. Tom qab hloov lub dab dej kub, qhov txhaum tau daws.
2. Kev sib cuag tsis zoo ntawm tsav Circuit Court: zais txaus ntshai ntawm connector oxidation
Tus tsav tsheb Circuit Court ntawm LCD nrog ib tug tawg code sib txuas lus nrog lub motherboard los ntawm ib tug FPC connector. Yog hais tias lub connector ntsib teeb liab cuam tshuam vim oxidation, looseness, los yog virtual soldering ntawm cov pob qij txha, cov kab lis kev cai tshwj xeeb yuav tig dub vim tsis muaj peev xwm qhib. Tom qab ib xyoos ntawm kev siv, lub ntsuas cua hauv tsev ntse tau ntsib tus cwj mem uas ploj lawm. Los ntawm qhov siab - qhov tseeb oscilloscope nrhiav tau, nws tau pom tias oxidation ntawm FPC connector pins ua rau lub teeb liab cuam tshuam. Tom qab ntxuav cov pins, cov zaub tau rov qab los.
3. Fais fab module tsis ua hauj lwm: saw cov tshuaj tiv thaiv ntawm tsis ruaj tsis khov voltage
Lub hwj chim module muab kev ua haujlwm ruaj khov rau lub LCD nrog cov cai tawg. Yog hais tias lub hwj chim tso zis voltage tsawg dhau (xws li capacitor aging, inductor virtual soldering) los yog lub ripple loj dhau (xws li tsis ua ke nrog lub lim dej), nws yuav ua rau tus tsav IC ua haujlwm txawv txav, thiab lub vijtsam yuav flicker lossis tig dub. Ib qho kev lag luam sensor nquag mus dub thaum lub sijhawm pib lub zog. Tom qab kuaj pom, nws tau pom tias qhov tso zis hluav taws xob ntawm lub zog hluav taws xob hloov pauv ntau dua ± 5%. Tom qab hloov lub capacitor, qhov txhaum ploj lawm.
3, Kev cuam tshuam ib puag ncig: ob qhov kev sib tw ntawm qhov kub thiab txias thiab electromagnetic cuam tshuam
1. Tsawg kub ib puag ncig: viscosity ntawm cov kua siv lead ua kua molecules nce sharply
Cov lus teb ceev ntawm cov ntaub ntawv siv lead ua kua yog ze rau qhov kub thiab txias. Thaum lub ambient kub qis dua -20 degree, viscosity ntawm cov kua siv lead ua kua molecules ho nce, ua rau muaj teeb meem nyob rau hauv molecular tig thiab qeeb los yog ua kom tiav freezing ntawm lub vijtsam teb. Ib qho khoom siv tshawb fawb txog Arctic siv cov txheej txheem tsis tu ncua LCD, uas tig dub thiab tsis tuaj yeem rov qab los rau hauv ib puag ncig ntawm -30 degree. Tom qab hloov mus rau qhov kub ntawm LCD sib tov, nws tseem tuaj yeem tso tawm ib txwm ntawm -40 degree.
2. Muaj zog electromagnetic teb: ib tug tsis pom kev tsav tsheb ntawm teeb liab cuam tshuam
Muaj ntau qhov kev cuam tshuam ntawm electromagnetic cuam tshuam (xws li zaus converters thiab motors) nyob rau hauv kev lag luam ib puag ncig. Yog hais tias lub LCD nrog ib tug tawg code tsis muaj shielded (xws li tsis tau nruab nrog ib tug hlau plhaub los yog sib nqus nplhaib), siab - lub suab nrov zaus yuav ob peb mus rau lub tsav Circuit Court los ntawm lub hwj chim los yog teeb liab kab, ua rau cov teeb meem nram qab no:
Tsis tu ncua flicker: Fais fab mov voltage fluctuations ua rau lub sij hawm hloov nyob rau hauv backlight brightness;
random dub screen: Electromagnetic cuam tshuam ua rau txawv txav ntawm tus tsav tsheb IC.
Qhov tawg code LCD ntawm cov kab ntau lawm ntawm ib lub Hoobkas nquag mus dub. Tom qab kuaj electromagnetic compatibility (EMC), nws tau pom tias 30MHz harmonic generated los ntawm lub zaus converter tau kis mus rau lub vijtsam los ntawm lub hwj chim kab. Tom qab txhim kho lub lim fais fab, tus nqi tsis ua haujlwm raug txo los ntawm 90%.
4, Cov txheej txheem ntau lawm: Qhov laj thawj sib sib zog nqus rau qhov tsis xws luag
1. ITO etching impurities: microscopic killers ntawm iav nto
ITO (indium tin oxide) conductive txheej yog ib qho tseem ceeb ntawm kev tawg code LCD. Yog tias muaj qhov tsis xws luag hauv cov txheej txheem etching (xws li residual impurities ntawm lub iav nto), nws tuaj yeem ua rau lub cev tsis zoo hauv zos, uas ua rau cov pob me me dub lossis kab ntawm qhov screen. Ib lub tuam txhab tsim tshuaj ntsuam code tau tswj xyuas qhov tsis xws luag hauv qab 0.3% los ntawm rau qhov kev tshuaj ntsuam xyuas (xws li kuaj lub tshuab ntsuas hluav taws xob thiab kev ntsuas hluav taws xob), tab sis tseem muaj qee cov khoom lag luam uas tig dub vim ITO etching impurities.
2. Polarizing zaj duab xis txuas sib txawv: ua rau muaj kev phom sij rau kev ua haujlwm kho qhov muag
Qhov tseeb ntawm kev sib txuas ntawm polarizing zaj duab xis ncaj qha cuam tshuam rau qhov sib piv thiab xim uniformity ntawm qhov screen. Yog hais tias qhov txuas lub kaum sab xis sib txawv tshaj ± 1℃los yog muaj npuas los yog wrinkles, nws yuav ua rau txo qis hauv zos transmittance thiab lub vijtsam yuav tshwm dub dub. Ib qho kev hloov kho LCD nrog cov lej tawg tau pom qhov muag pom tsis pom vim qhov sib txawv ntawm qhov txuas polarizer, tab sis tom qab rov txuas dua, cov zaub ntshiab tau rov qab los.
5, Kev daws: Cov txheej txheem tag nrho ntawm kev tiv thaiv mus rau kev kho
Kev xaiv cov khoom siv: Ua ntej siv UV resistant polarizing zaj duab xis, dav kub ua kua siv lead ua sib tov, thiab muaj kev ntseeg siab sealant los txhim kho qhov hloov pauv ntawm qhov screen ib puag ncig;
Circuit Court tsim: Integrated EMI filtering module, fais fab mov stabilization Circuit Court, thiab overheating tiv thaiv mechanism los txhim khu kev tiv thaiv - cuam tshuam;
Cov txheej txheem ntau lawm: Qhia cov cuab yeej tshawb nrhiav tsis siv neeg (xws li AOI optical detector), nruj me ntsis tswj cov txheej txheem tseem ceeb xws li ITO etching thiab polarizer txuas;
Environmental tswj: Nyob rau hauv huab cua kub los yog muaj zog electromagnetic teb ib puag ncig, nruab ib lub tsho tiv thaiv los yog tiv thaiv npog rau lub tawg code LCD kom txo tau ib puag ncig cuam tshuam;
Kev kuaj mob tsis raug: Siv cov cuab yeej xws li oscilloscopes thiab multimeters txhawm rau kuaj xyuas lub zog hluav taws xob, teeb liab waveform, thiab cov xwm txheej txuas, thiab nrhiav qhov chaw txhaum sai sai.
