Yuav ua li cas thiaj ua tau ib qho LED Screen: Lub Chaw Tsim Khoom Piav Qhia
Yog tias koj tau xav paub yuav ua li cas thiaj ua tau lub vijtsam LED, nws yog qhov tseem ceeb kom paub tias cov txheej txheem yog cov txheej txheem ntawm precision engineering, automated los ua ke, thiab kev sim nruj. Nws tsis yog ib qhov project DIY, tab sis theej cov txheej txheem tsim khoom. Kev nkag siab txog yuav ua li cas thiaj li ua tau lub vijtsam coj ua thev naus laus zis pab cov neeg yuav khoom txaus siab rau yam uas nkag mus rau hauv cov khoom lag luam zoo thiab vim li cas tus nqi sib txawv ntawm cov neeg muag khoom sib txawv.
Los ntawm semiconductor mus rau lub teeb Source: LED nti
Txoj kev taug kev ntawm yuav ua li cas thiaj ua tau ib qho screen coj pib nrog LED nti nws tus kheej - ib qho me me semiconductor uas tawm lub teeb thaum hluav taws xob hla nws. Cov chips no feem ntau yog tsim los ntawm cov ntaub ntawv xws li gallium nitride (GaN) los yog indium gallium nitride (InGaN), loj hlob ntawm substrate siv cov txheej txheem hu ua epitaxy. Cov theem no txiav txim siab lub nti qhov ua tau zoo, xim purity, thiab lifespan.
Tom qab cov txheej txheem epitaxial loj hlob, lub wafer tau ua tiav, diced, thiab sim rau xim thiab ci. Tom qab ntawd cov chips raug txheeb rau hauv "bins" raws li lawv qhov kev ua tau zoo. Cov txheej txheem binning no tseem ceeb heev; siv cov chips los ntawm tib lub thawv kom cov xim sib xws thoob plaws txhua qhov screen. Ib qho screen nrog mismatched bins yuav pom cov xim txawv uas nyuaj rau kho.
Surface Mount Technology (SMT) thiab PCB los ua ke
Thaum cov chips LED npaj tau, lawv tau muab tso rau hauv lub rooj tsav xwm luam tawm (PCB). Qhov no yog qhov uas lo lus "SMD" (Nto Mount Device) los ua si. Cov txheej txheem, hu ua Surface Mount Technology, siv xaiv - thiab - tso cov cav tov kom raug muab tso rau ntau txhiab lub chips me me rau hauv PCB. Cov kauj ruam no yog tag nrho automated thiab yuav tsum tau precision mus rau feem ntawm ib millimeter.
Tom qab cov chips raug muab tso, PCB mus los ntawm qhov cub reflow soldering. Lub solder paste melts, ruaj cov hluav taws xob sib txuas thiab kho cov LEDs rau lub rooj tsavxwm. Qhov zoo ntawm cov soldering yog qhov tseem ceeb; cov pob qij txha tsis zoo tuaj yeem ua rau cov pixels tuag lossis kev sib txuas tsis sib xws. A visual inspection and electrical testing follow to catch any defects at this stage.
Module Production thiab Potting
Cov PCBs uas muaj LEDs yog tom qab ntawd ua ke nrog cov txheej txheem tiv thaiv thiab cov tsav tsheb ICs (kev sib koom ua ke uas tswj cov tam sim no thiab xim ntawm txhua LED) los tsim cov qauv. Ib kauj ruam tseem ceeb ntawm yuav ua li cas thiaj ua tau lub teeb pom kev zoo yog daim ntawv thov txheej tiv thaiv, feem ntau siv cov txheej txheem hu ua "potting." Qhov no suav nrog encapsulating LED nto thiab cov khoom hauv pob tshab epoxy lossis silicone resin.
Potting ua haujlwm ob lub hom phiaj: nws muab kev tiv thaiv txhua yam tiv thaiv kev cuam tshuam thiab kev co, thiab nws muaj kev sib khi ib puag ncig tiv thaiv ya raws thiab plua plav. Hom ntawm cov khoom thiab lub thickness ntawm lub txheej cuam tshuam lub module lub durability thiab lub teeb kis tau tus mob. Nyob rau sab nraum zoov modules, txheej tiv thaiv no feem ntau thicker thiab tsim los tiv thaiv UV degradation.
Txwj Laug los ua ke thiab kev koom ua ke
Tus kheej modules ces precisely mounted rau hauv thav ntawv hu ua "cabinets." Cov txee no yog lub tsev thaiv ntawm qhov screen kawg. Lawv muaj cov khoom siv hluav taws xob, tau txais daim npav (uas ua cov teeb liab nkag), thiab cabling. Lub txee tsim yog ib qho tseem ceeb ntawm qhov yooj yim ntawm qhov screen yog rau nruab thiab tswj. Cov txee tuaj yeem tsim rau pem hauv ntej- nkag mus (cov qauv raug tshem tawm ntawm sab xub ntiag) lossis sab nraub qaum- nkag (kev pabcuam tom qab).
Thaum lub sij hawm sib dhos, txhua lub txee ua tiav cov txheej txheem calibration. Calibration ntsuas qhov ci thiab xim tso zis ntawm txhua pixel thiab tsim ib daim ntawv qhia kho. Daim ntawv qhia no tau muab khaws cia rau hauv daim npav tau txais los xyuas kom meej qhov ci ci thiab xim thoob plaws lub txee. Qhov no yog ib kauj ruam tseem ceeb; tsis muaj calibration, txawm me me variations hauv LED kev ua tau zoo yuav pom ntawm qhov muag liab qab.
Thaum kawg los ua ke, kuaj, thiab kev teeb tsa
Cov theem kawg ntawm yuav ua li cas ua kom cov zaub coj los sib sau ua ke rau hauv cov qauv ua tiav, feem ntau ntawm qhov chaw teeb tsa. Cov txheej txheem no yuav tsum muaj cov kws tsim qauv tsim qauv kom ntseeg tau tias tus ncej txhawb nqa tau qhov hnyav. Thaum sib sau ua ke, lub vijtsam txuas nrog lub kaw lus tswj thiab dhau qhov kev sim zaum kawg nrog ntau yam qauv video.
Kev ntsuam xyuas feem ntau suav nrog kev kuaj xyuas cov pixels tuag, txheeb xyuas cov xim sib xws, thiab ntsuas qhov ci ntawm ntau qib. Lub vijtsam tseem raug sim nrog cov ntsiab lus video tiag tiag kom ntseeg tau tias kev ua si du thiab ua kom raug. Rau cov ntxaij vab tshaus sab nraum zoov, kev ntsuas dej tsis haum yuav ua tau raws li IP (Ingress Protection) tus qauv los xyuas qhov tseeb ntawm cov ntsaws ruaj ruaj.
Nov yog cov ntsiab lus ntawm cov kauj ruam tseem ceeb:
Chip Fabrication:Loj hlob semiconductor khaubncaws sab nraud povtseg thiab sorting chips los ntawm brightness/xim.
SMT Mounting:Tso thiab soldering LEDs rau ntawm PCB.
Npog / Encapsulation:Siv kev tiv thaiv resin txheej rau modules.
Txee Assembly:Mounting modules rau hauv thav duab nrog lub hwj chim thiab tswj hluav taws xob.
Calibration:Ntsuas thiab kho qhov ci / xim rau qhov sib xws.
Kev teeb tsa:Kev sib dhos cov txee rau ntawm - qhov chaw thiab qhov kawg kev xeem.
Cov ntsiab lus
Kev nkag siab yuav ua li cas los ua ib lub teeb pom kev zoo qhia txog qib ntawm qhov tseeb thiab kev tswj xyuas zoo uas yuav tsum tau ua los tsim cov khoom lag luam txhim khu kev qha. Txhua kauj ruam, los ntawm purity ntawm lub semiconductor mus rau qhov tseeb ntawm lub calibration, pab mus rau qhov kawg duab zoo thiab lub neej ntev. Thaum ntsuas qhov kev yuav khoom, xav txog cov txheej txheem tsim khoom no raws li qhov ntsuas ntawm cov khoom lag luam tag nrho cov nqi thiab kev ua haujlwm.
FAQ
1. Kuv puas tuaj yeem ua lub vijtsam LED rau kuv tus kheej hauv tsev?
Tsim kom muaj - nplai loj, siab- daws teeb meem LED npo yuav tsum muaj cov cuab yeej tshwj xeeb xws li xaiv- thiab- tso cov tshuab thiab reflow qhov cub, ua rau nws feem ntau ua tsis tau zoo rau kev teeb tsa hauv tsev. Txawm li cas los xij, koj tuaj yeem tsim cov monochrome me me lossis qis - daws teeb meem qhia rau cov haujlwm nyiam siv ib tus neeg LED matrices thiab microcontrollers.
2. Dab tsi yog qhov kim tshaj plaws ntawm kev ua ib qho screen LED?
Cov chips LED lawv tus kheej feem ntau sawv cev rau ib feem tseem ceeb ntawm tus nqi, tshwj xeeb tshaj yog rau siab -zoo, siab- ci ci chips. Cov txheej txheem binning, uas txheeb cov chips rau xim sib xws, kuj ntxiv rau tus nqi.
3. Nws siv sijhawm ntev npaum li cas los ua qhov kev cai LED npo?
Lub sijhawm tsim khoom sib txawv nyob ntawm qhov nyuaj thiab qhov loj ntawm qhov project. Lub sij hawm ua cov txheej txheem ntau lawm feem ntau yog ob peb lub lis piam mus rau ob peb lub hlis, uas suav nrog kev tsim khoom, PCB fabrication, sib dhos, kev sim, thiab kev tswj kom zoo.
4. Vim li cas calibration tseem ceeb thaum ua ib qho screen LED?
Calibration yog qhov tseem ceeb los kho qhov kev hloov pauv ntawm lub teeb ci thiab xim ntawm tus kheej LEDs. Yog tsis muaj nws, qhov screen kawg yuav pom "patches" lossis "stripes," uas ua rau cov duab tsis zoo sib xws.
