Ib, txheej txheem kev teeb tsa yooj yim: los ntawm kev npaj cov cuab yeej mus rau kev sim zaum kawg
1. Kev npaj cov cuab yeej thiab cov khoom siv
Cov cuab yeej: ob npaug -ib daim kab xev, plua plav- daim ntaub dawb, cov cuab yeej tshwj xeeb sib dhos (xws li cov kab xev xovxwm), tiv thaiv- lub dab teg zoo li qub, tweezers, ntswj ntsia hlau, multimeter.
Khoom siv: tawg LCD, backlight module (yog tias xav tau), PCB board, conductive adhesive strip los yog hlau tus pin, tiv thaiv zaj duab xis, ya raws - tus neeg saib xyuas pov thawj.
Ib puag ncig kev xav tau: Chav huv huv (qib huv huv ntau dua lossis sib npaug ntawm 100000), qhov kub thiab txias 20-25 degree, av noo 40% -60%, tsis txhob muaj hluav taws xob zoo li qub thiab tshav ntuj ncaj qha.
2. Cov lus piav qhia ntxaws txog kev teeb tsa cov kauj ruam
Kauj ruam 1: Tshem tawm cov yeeb yaj kiab tiv thaiv
Hauv cov txheej txheem ib txwm muaj, cov tswv lag luam tuaj yeem siv riam phom ncaj qha los txhuam tawm cov yeeb yaj kiab tiv thaiv, tab sis nws yooj yim los khawb lub iav LCD. Pom zoo kom siv ob daim kab xev -sided daim kab xev los pab tshem tawm zaj duab xis: qhwv daim kab xev nyob ib ncig ntawm tus cwj mem, maj mam nias ib lub ces kaum ntawm LCD thiab maj mam rub nws, siv cov nplaum nplaum kom tshem tawm cov yeeb yaj kiab yam tsis muaj kev puas tsuaj. Tib lub lag luam yog siv rau kev tiv thaiv zaj duab xis ntawm lub backlight module.
Kauj Ruam 2: Ntxuav thiab Sib Nqus
Tuav cov plua plav-dawb daim ntaub hauv isopropanol thiab maj mam so cov LCD electrodes thiab PCB ncoo kom tshem tawm cov ntiv tes thiab cov roj stains. Txiav txim siab qhov chaw txheeb ze ntawm LCD thiab PCB los ntawm cov txheej txheem phaib los yog kev sib dhos pinholes, kom ntseeg tau tias cov lej lej sib raug rau ib qho - rau - ib qho nrog electrodes.
Kauj Ruam 3: Kho thiab Vuam
Kev sib txuas ntawm cov nplaum nplaum: Muab cov nplaum nplaum nplaum ntawm lub LCD thiab PCB, nias nws ua ke nrog cov cuab yeej tshwj xeeb kom ntseeg tau tias kev sib cuag siab (feem ntau yog 0.5-1N / mm ²).
Hlau pin soldering: Yog tias LCD siv cov pins hlau (xws li PIN pins), nws yog ib qho tsim nyog yuav tsum tau ua ntej kho lub LCD rau PCB, thiab tom qab ntawd txuas cov pins los ntawm reflow soldering lossis phau ntawv soldering. Lub vuam kub yuav tsum tau tswj hauv qab 260℃tsis pub ntau tshaj 3 vib nas this kom tsis txhob iav tawg los ntawm thermal shock.
Kauj ruam 4: Backlight module kev koom ua ke
Yog tias xav tau lub teeb pom kev zoo, ua ntej txhim kho lub teeb pom kev zoo rau PCB, thiab tom qab ntawd sib sau ua ke nrog LCD los ntawm ob npaug -ib daim kab xev lossis clips. Nco ntsoov tias qhov kev ncua deb ntawm lub teeb nraub qaum thiab LCD yuav tsum tsawg dua lossis sib npaug li 0.3 hli kom tsis txhob pom lub teeb pom kev lossis tsis sib xws.
Kauj Ruam 5: Kev Tshawb Fawb Kawg
Siv lub tshuab ntsuas ntau los kuaj xyuas cov khoom siv hluav taws xob ntawm LCD thiab PCB, thiab paub meej tias tsis muaj qhov luv luv lossis qhib circuits; Fais fab ntawm kev sim zaub muaj nuj nqi, xyuas seb cov lej ntu ua tiav, tsis muaj kab ploj lossis kev sib tham.
2, Cov ntsiab lus tseem ceeb: kev poob siab tsis kam, noo noo tsis kam, thiab tiv thaiv - zoo li qub
1. Seismic tsim
Cov qauv kev poob siab: Sau cov ntaub qhwv silicone lossis cov roj hmab cais tawm ntawm lub LCD thiab lub casing kom txo tau siab - zaus vibrations (100-2000Hz). Piv txwv li, lub tsheb ntsuas vaj huam sib luag LCD txo qhov kev vibration kis tau tus nqi los ntawm 80% mus rau 30% los ntawm kev sib xyaw ntawm cov hlau springs thiab roj hmab pads.
Cov khoom siv ntxiv dag zog: Tshuaj muaj zog iav (xws li Corning Gorilla Glass) yog siv los ua kom muaj kev cuam tshuam ntawm LCD rau 3-5 npaug ntawm cov iav zoo tib yam.
Kev tswj kom nquag plias: Hauv cov khoom siv siab- kawg, piezoelectric ceramic tsav tsheb tau koom ua ke los tiv thaiv kev tawm tsam sab nraud los ntawm kev rov qab vibration, ua tiav kev co kev sib cais ntawm ntau dua 90%.
2. Kev kho dej tsis zoo
Sealing tsim: Siv silicone los yog siv cov roj hmab conductive ntawm kev sib koom ua ke ntawm LCD thiab lub casing kom tsis txhob muaj dej vapor nkag mus. Lub sealing kev ua tau zoo ntawm lub chassis yuav tsum ncav cuag IP65 qib lossis siab dua.
Daim ntawv thov Desiccant: Muab cov khoom desiccants (xws li cov khoom siv silica gel) hauv ntim lossis cov khoom siv kom muaj cov av noo tsawg dua lossis sib npaug li 50% RH thiab zam cov electrode corrosion.
Peb cov ntaub ntawv pov thawj xim txheej: Txau peb cov pov thawj xim (xws li acrylic) rau ntawm qhov chaw ntawm PCB solder pob qij txha los tsim cov txheej txheem tiv thaiv nrog lub thickness ntawm 0.1-0.3mm, uas suppresses kev nthuav tawm ntawm cov pob qij txha tawg.
3. Kev ntsuas tiv thaiv zoo li qub
Cov qauv kev khiav hauj lwm: Cov neeg ua haujlwm yuav tsum hnav cov khoom tiv thaiv - zoo li qub wristbands, nteg anti- cov ntaub qhwv zoo li qub rau ntawm lub rooj zaum ua haujlwm, thiab xyuas kom meej tias cov av tiv thaiv tsawg dua lossis sib npaug li 1 Ω.
Cov khoom ntim: Siv cov khoom siv tiv thaiv- lub hnab zoo li qub (xws li lub hnab dub conductive) txhawm rau ntim cov LCD thiab tsis txhob muaj hluav taws xob zoo li qub thaum thauj mus los.
Cov khoom siv hauv av: Thaum lub sij hawm teeb tsa, xyuas kom meej tias cov hlau ncej ntawm lub LCD muaj kev ntseeg siab txuas nrog lub hauv paus ntsiab lus ntawm PCB kom tso cov nqi zoo li qub.
3, Kev Lag Luam Xyaum Case: Los ntawm Automotive Electronics mus rau Industrial Instruments
1. Kev teeb tsa ntawm lub tsheb ntsuas vaj huam sib luag LCD
Case: Cov cuab yeej LCD ntawm cov chaw tsim khoom siv tsheb hybrid yuav tsum tau tiv thaiv lub cav vibration (50-500Hz) thiab kev cuam tshuam ntawm txoj kev (kev nrawm nrawm ntawm 50g). Cov tshuaj muaj xws li:
Peb theem kev poob siab qhov system: hlau caij nplooj ntoos hlav (tsawg zaus) + roj hmab ncoo (nruab nrab zaus) + magnetorheological kua (siab zaus), txo qis kev vibration kis mus rau hauv qab 5%.
Trapezoidal key positioning: Lub plhaub sab hauv yog tsim los nrog cov qhov tseem ceeb trapezoidal, uas koom tes nrog lub LCD lub trapezoidal yuam sij kom ua tiav qhov tseeb qhov chaw thiab tiv thaiv cov ntsia hlau loosening.
Cov nyhuv: Los ntawm MIL-STD-810G tub rog tus qauv ntawv pov thawj, tus nqi ua tsis tiav tau raug txo los ntawm 15% mus rau qis dua 0.5%.
2. Kev teeb tsa kev lag luam ntsuas LCD
Case: Lub LCD ntawm Siemens S7-1200 PLC yuav tsum tau ua haujlwm ruaj khov hauv ib puag ncig kev lag luam xws li -20℃txog 70 degree. Cov ntsiab lus installation muaj xws li:
Optimization ntawm conductive nplaum strip: High elasticity conductive silicone yog siv los xyuas kom meej kev sib cuag siab ntawm 0.5N / mm ² yog tswj ntawm -40 degree.
Ob chav txheej PCB qauv: Los ntawm kev sib txuas ntawm PCB thiab lub rooj tsavxwm, lub neej qaug zog ntawm cov pob qij txha tau txhim kho ntau dua 10 zaug, ua tau raws li IEC 60068-2-64 tus qauv.
Cov nyhuv: Khiav tsis tu ncua rau ntau tshaj 5 xyoos yam tsis muaj kev ua tsis tiav hauv kev lag luam hnyav.
3. Kev teeb tsa ntawm Consumer Electronics LCD
Case: Ib lub kauj-toog npab ntse txoj cai tawg LCD yuav tsum ua kom tiav ultra- nyias tsim (thickness Tsawg dua lossis sib npaug li 1.2mm). Cov tshuaj muaj xws li:
COF (Chip on Film) ntim: Ncaj nraim khi tus tsav tsheb IC rau lub rooj tsavxwm hloov tau yooj yim kom txo tau qhov chaw nyob ntawm PCB.
Laser vuam: Siv laser vuam siv ib txwm reflow soldering kom tsis txhob kub kub puas rau LCD thiab nce vuam zog los ntawm 30%.
Cov nyhuv: Cov khoom tuab tau raug txo los ntawm 1.5mm mus rau 1.0mm, ua rau 20% nce hauv kev ua lag luam.
