Cov Txheej Txheem Tsim Khoom Niaj Hnub LED Screen
Cov zaub LED (Light-Emitting Diode) tau dhau los ua ib qho thev naus laus zis tseem ceeb hauv kev lag luam khoom siv hluav taws xob hauv ob peb xyoos dhau los ua tsaug rau lawv cov duab zoo dua, kev siv hluav taws xob zoo, thiab lub neej ntev. Txawm li cas los xij, kev tsim cov zaub LED yog ib qho txheej txheem nyuaj uas xav tau cov thev naus laus zis siab heev. Tsab xov xwm no yuav piav qhia txog cov txheej txheem tsim cov zaub LED niaj hnub, los ntawm cov khoom siv raw mus rau cov khoom kawg pom hauv ntau yam khoom siv hluav taws xob xws li TV, computer monitors, thiab xov tooj ntawm tes.
1. Cov Khoom Siv Tseem Ceeb thiab Cov Tshuab LED
Kev tsim cov vijtsam LED pib nrog kev xaiv cov ntaub ntawv tseem ceeb. LEDs yog ua los ntawm cov semiconductors ua tiav rau hauv LED chips. Feem ntau, cov tshuaj xws li Gallium Nitride (GaN), Indium Gallium Nitride (InGaN), thiab Aluminium Gallium Indium Phosphide (AlGaInP) yog siv. Cov semiconductors no yog xaiv rau lawv cov khoom, uas tso cai rau lawv tso tawm lub teeb nrog kev ua haujlwm siab.
Cov thev naus laus zis LED nws tus kheej vam khom lub hauv paus ntsiab lus ntawm electroluminescence, qhov twg cov electrons sib xyaw nrog cov qhov hauv cov khoom siv semiconductor kom tso tawm lub zog hauv daim ntawv ntawm photons, lossis cov khoom me me. Cov xim teeb pom kev zoo nyob ntawm qhov sib txawv zog (bandgap) ntawm cov khoom siv semiconductor siv.
2. Cov Txheej Txheem Loj Hlob (Epitaxy)
Kauj ruam thawj zaug hauv kev tsim cov LED chip yog cov txheej txheem loj hlob epitaxial. Cov txheej txheem no siv cov molecules ntawm cov khoom siv semiconductor kom raug cog rau ntawm lub substrate (feem ntau yog sapphire, silicon, lossis silicon carbide) hauv ib puag ncig tswj hwm nruj. Txoj kev siv feem ntau yog Metal-Organic Chemical Vapor Deposition (MOCVD). Nov yog cov kauj ruam:
1. Kev Loj Hlob Txheej Buffer: Txheej buffer yog txheej pib uas loj hlob ntawm lub substrate kom ntseeg tau tias muaj kev sib txuas zoo.
2. Txheej Txheem Loj Hlob: Txheej tom ntej yog txheej txheem nquag, uas yog txheej nyias nyias uas cov hluav taws xob thiab cov qhov yuav sib ntsib los tsim lub teeb.
3. Kev Loj Hlob ntawm PN Txheej: Cov khaubncaws sab nraud povtseg P-doped thiab n-doped los ua ib qho kev sib tshuam pn, qhov twg qhov xwm txheej electroluminescence tshwm sim.
3. Cov Txheej Txheem Tsim Khoom LED Wafer
Tom qab loj hlob cov txheej semiconductor, cov kauj ruam tom ntej yog los tsim cov LED wafer. Nov yog cov txheej txheem:
1. Kev Txiav: Cov wafers loj raug txiav ua tej daim me me siv cov cuab yeej tshwj xeeb xws li lub tshuab txiav.
2. Kev Tshuaj Xyuas Qhov Muag: Cov chips txiav raug tshuaj xyuas seb puas zoo thiab cov chips uas tsis ua raws li cov qauv raug pov tseg.
3. Kev Ntxuav: Tom qab cov txheej txheem dicing, cov LED chips raug ntxuav ntawm cov khib nyiab thiab lwm yam khoom qias neeg siv cov tshuaj ntxuav tshuaj.
4. Mounting lub LED Chip rau ntawm lub tuag
Tom qab cov LED chips tau ua tiav thiab kuaj xyuas lawm, cov kauj ruam tom ntej yog mount cov chips rau ntawm lub pwm loj dua. Cov txheej txheem no muaj ntau kauj ruam:
1. Kev Sib Txuas Die: Lub LED chip yog txuas rau lub sub-mount, uas ua haujlwm ua lub hauv paus rau txhua yam khoom siv. Cov txheej txheem no siv cov ntaub ntawv sib txuas xws li epoxy lossis solder.
2. Kev Sib Txuas Hlau: Kev sib txuas hluav taws xob los ntawm lub LED chip mus rau lub pob LED yog ua los ntawm kev sib txuas hlau. Cov txheej txheem no cuam tshuam nrog kev siv cov hlau kub lossis hlau txhuas zoo heev.
3. Kev Kaw: Txhawm rau tiv thaiv lub LED chip, cov txheej txheem encapsulation yog ua tiav qhov twg lub LED chip yog qhwv hauv epoxy lossis silicone resin uas kuj ua haujlwm los ua kom lub teeb kis tau zoo.
5. Kev Tsim Khoom Vaj Huam Sib Luag LED
Thaum cov LED chips raug ntsia rau ntawm lub pwm, cov kauj ruam tom ntej yog los tsim lub vaj huam sib luag zaub, uas muaj cov matrix ntawm LED chips. Lub vaj huam sib luag no tau sib sau ua ke hauv cov kauj ruam hauv qab no:
1. Qauv Pixels Printing: Qhov kev luam ntawv no siv inkjet printing lossis photolithography techniques los xyuas kom meej tias cov LEDs raug muab tso rau nrog high precision.
2. Vaj Huam Sib Luag: Lub vaj huam sib luag zaub yog sib sau ua ke los ntawm kev sib txuas ntau txhiab lossis ntau lab tus LED chips hauv cov array lossis qauv xav tau.
3. Kev Kho Xim: Txhua lub pixel raug kho kom ntseeg tau tias muaj xim thiab ci ntsa iab.
6. Kev Sib Koom Tes Vaj Huam Sib Luag ntawm Ntaus Ntawv
Hauv cov khoom kawg xws li TVs, monitors, lossis smartphones, LED panels tau koom ua ke rau hauv lub cuab yeej raws li nram no:
1. Kev Teeb Tsa Vaj Huam Sib Luag: Cov vaj huam sib luag LED tau teeb tsa rau hauv lub thav duab uas ua haujlwm ua lub qauv txhawb nqa.
2. Txuas Lub Tshuab Hluav Taws Xob thiab Tus Tswj: Lub vaj huam sib luag txuas nrog lub voj voog tswj uas suav nrog lub processor video thiab LED driver los tswj cov zaub.
3. Kev Ntsuas thiab Kev Tshuaj Xyuas: Cov khoom siv yuav tsum tau kuaj xyuas kom meej tias txhua lub pixels ua haujlwm tau zoo thiab ua tau raws li cov qauv zoo.
7. Kev Ua Tiav thiab Kev Tshuaj Xyuas Zaum Kawg
Ua ntej cov khoom siv raug tso tawm rau hauv kev ua lag luam, lawv yuav tsum ua tiav thiab tshuaj xyuas qhov kawg kom ntseeg tau tias tsis muaj qhov tsis zoo lossis teeb meem uas tsis tau pom dua. Cov txheej txheem no suav nrog:
1. Txheej Txheem Ua Kom Tiav: Lub cuab yeej ua tiav tag nrho suav nrog kev teeb tsa lub plhaub kawg thiab cov khoom ntxiv xws li lub vaj huam sib luag tom qab lossis lub vijtsam tiv thaiv.
2. Kev Tshuaj Xyuas Zoo: Tus neeg tshuaj xyuas yuav ua qhov kev ntsuam xyuas pom thiab ua haujlwm ntawm lub cuab yeej kom ntseeg tau tias daim duab, xim, thiab qhov kaj ua raws li cov qauv tsim.
3. Kev Ntsuas Ua Haujlwm: Lub cuab yeej raug sim nyob rau hauv ntau yam kev ua haujlwm kom ntseeg tau tias muaj kev ntseeg siab thiab ruaj khov.
8. Kev Ntim Khoom thiab Kev Faib Khoom
Tom qab dhau qhov kev kuaj xyuas zoo zaum kawg, lub cuab yeej npaj txhij rau kev ntim khoom thiab faib tawm. Kev ntim khoom tsis yog tsuas yog qhov zoo nkauj xwb; nws kuj tseem ua kom ntseeg tau tias lub cuab yeej tiv thaiv thaum lub sijhawm xa khoom mus rau cov neeg siv khoom thoob ntiaj teb.
1. Kev Ntim Khoom Tiv Thaiv: Txhua lub cuab yeej raug ntim siv cov khoom siv tiv thaiv xws li styrofoam thiab cov npuas npuas los tiv thaiv kev puas tsuaj rau lub cev.
2. Kev Kaw: Lub thawv ntaus ntawv raug kaw nrog daim ntawv lo uas muaj cov ntaub ntawv khoom thiab cov lus qhia rau kev siv.
3. Kev Faib Tawm: Cov khoom siv raug thauj mus los siv ntau txoj kev thauj mus los xws li cua, dej hiav txwv, lossis av nyob ntawm qhov deb thiab qhov ceev ntawm kev xa khoom.
Xaus
Cov txheej txheem tsim khoom rau cov zaub LED niaj hnub no muaj ntau yam nyuaj thiab zoo heev, txij li kev xaiv cov khoom siv semiconductor mus rau qhov kawg ntim khoom. Cov kev xav tau thev naus laus zis siab thiab kev ua haujlwm raug ntawm txhua theem ua rau cov zaub LED ua cov khoom muaj cov duab zoo dua thiab kev siv hluav taws xob zoo. Los ntawm kev tsim kho tshiab thiab kev txhim kho tas mus li, cov zaub LED txuas ntxiv teeb tsa cov qauv tshiab hauv cov khoom siv hluav taws xob niaj hnub.
