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Yuav Ua Li Cas thiaj Flexible OLED Screen?

Yuav Ua Li Cas thiaj Flexible OLED Screen?

Mar 06, 2018

Qhov kev ywj pheej encapsulation yog muab faib ua plaub theem:

① Cell ntim iav raug

② Siv lub iav sealing

③ Muab cov iav

④ Laser foob

 

Hauv cov kauj ruam saum toj no, koj tuaj yeem pom cov lus siv rov qab. Nws yog lo lus "iav". Qhov dog dig OLED (yeem) vaj huam sib luag siv iav ua ib lub substrate, thiab cov khoom ntim kuj siv iav. Qhov no sib txawv ntawm lub vaj huam sib luag yooj yim OLED, thiab nws tsis tas yuav tsum nyom thaum xub thawj, yog li txawm tias qhov saum toj thiab hauv qab ntawm vaj huam sib luag yog iav, tsis muaj teeb meem.


Txawm li cas los xij, lub vaj huam sib luag yoojyim yuav tsum yoog kom yooj yim, yog li siv cov ntaub iav tsis siv rau ntawm lub vaj huam sib luag. Txawm hais tias lub iav tuaj yeem ua tus nyias nyias, nws tsis txaus kom muaj lub npe hu ua "flexible". Yog li, thiaj li ua tau yooj yim OLED, lub substrate yuav tsum yog cov khoom siv tau yooj yim hu ua PI (polyimide), tsis yog iav.


Tsuas siv tau nws yooj yim khoov xwb, tab sis nws siv cov thev naus laus zis (TFE) kom zoo tiv thaiv huab cua thiab dej ntawm infiltrating rau hauv cov organic organic txheej.


Thaum xub thawj siab ib muag, nws tsis zoo li yuav txawv ntawm qhov yooj yim txheej txheem ntawm OLED. Yog li cia wb saib sab hauv seem.

 

Feem ntau, txhua lub hauv paus ntawm OLED muaj ib lub cim fais fab ntawm tus ncej. Raws li pom hauv daim duab. Sab saum toj thiab sab ntawm cov pob yeeb yaj kiab yog cov khoom qub. Nws yog ib lub pob tag nrho, vim nws tsis yog ib qho khoom siv ntxiv, tab sis ib cov ntaub ntim cov khoom ntim ntawm lub vaj huam sib luag uas ua tiav cov txheej txheem lub zog. Yuav kom hloov tau yooj ywm yooj yim, nws yog ib qho tsim nyog yuav tau ua kom cov khoom siv rau cov khoom siv no hauv txoj kev ntawm zaj yeeb yaj kiab.

  

Thaum koj ntug qhov ntu ntawm cov pob yeeb yaj kiab, koj tuaj yeem pom tias cov pob yeeb yaj kiab los ntawm ntau cov khaubncaws sab nraud povtseg. Tsis zoo li cov tsoos OLED, uas yog them nrog ib qho iav, zaj duab xis yog encapsulated nrog cov qauv ntawm cov qauv hauv / cov organic organic multilayer. Los ntawm txoj kev ua tus kabmob uas tsis muaj kab xev / cov organic, txoj hau kev ntawm huab cua thiab dej yuav siv sij hawm ntev, thiab nws yuav tsis yooj yim mus txog luminescent txheej.


  

Yog li, yog vim li cas peb thiaj siv cov qauv ntawm cev thiab cov organic membrane?

Hom phiaj, nws zoo dua rau ib txheej pob. Vim hais tias lub thickness yog nyias, cov khoom yog tsawg, thiab txoj kev yuav ua yooj yim. Kev siv cov yeeb yam hauv inorganic nyias tsuas tuaj yeem tiv thaiv tau hydrate thiab cua infiltration. Txawm li cas los xij, vim muaj cov yam ntxwv ntawm cov ntaub ntawv inorganic, nws yooj yim los tsim cov hmoov av (cov plua plav me) los yog "pinhole", thiab cua thiab noo noo yuav kis tau los ntawm txoj kev no. Yog li ntawd, tsuas yog 2 cov khaubncaws sab nraud povtseg lossis ntau dua thiaj li tiv thaiv tau ntawm qhov tob tob.

Yog li cas lub luag hauj lwm ntawm cov yeeb yam organic? Organic zaj yeeb yaj kiab yeej yog ib daim txhuam cev xws li tshuaj. Organic molecules muaj cov khoob loj dua li cov dej tsis haum, yog li cov organic molecules tsis tuaj yeem siv los tiv thaiv kev nkag mus. Organic films yog siv rau kev sib tw cov organic phaj rau kev sib tw (planarization). Organic nyias zaj duab xis yog tso rau thawj zaj duab xis inorganic ua, uas pab tsim ob txheej ntawm cov duab zaj duab xis inorganic thin nrog zoo zoo.


Niaj hnub no, peb tau kawm tho film ntim rau cov raug tsim tawm OLED.

Yog tias cov pa oxygen (O2) nkag mus rau qhov sib txawv ntawm lub vaj huam sib luag, qhov chaw sib tham (Interface) nruab nrab ntawm qhov cathode thiab EIL txheej ntawm sab saum toj ntawm EML yuav tsum oxidize, kom lub cathode thiab EIL yuav pib thiab tus neeg yuav hu ua yuav txom nyem heev . Yog tias qhov no tshwm sim, cov electrons yuav tsis pub kis tau ntawm cov cathode thiab EIL, ua rau qee pixels tsis ci (dub pob).

Kuj tseem muaj teeb meem thaum dej tso tawm. Thaum dej (H2O) penetrates qhov kis me me ntawm lub vaj huam sib luag, hydrogen yog sib cais los ntawm cov pa oxygen ntawm electrochemical cov tshuaj tiv thaiv hauv dej, thiab cov hydrogen (H2) ua npuas. Cov npuas ua cov cathode txheej ntab, ua rau nws tsis yooj yim rau cov electrons hloov ntawm cov cathode thiab cov EIL. Zoo li cov pa oxygen permeation, qhov no kuj ua rau cov pob dub.


Hauv particular, thaum lub pob tsis ua hauj lwm kom zoo, cov pa thiab noo noo yuav tsis nyob hauv ib qho chaw, tab sis tseem yuav kis tau, thiab cov dub dub yuav kis mus txuas ntxiv. Li ntawd, nws yog ib qho tseem ceeb heev uas yuav tsum tau nkag mus rau hauv theem tsim khoom.

Daim duab no yog qhia tias qhov tseeb qhov tseeb yog ua rau ntawm ntug kev vaj huam sib luag. Lub txoos qauv yuav txawv ntawm daim duab.


Yog li cas tsis encapsulation thaiv cov teebmeem sab nraud? Cov pob kws ntse hauv OLED, raws li muaj nyob hauv daim duab yav dhau los, yuav them nrog cov iav pob ntawm OLED vaj huam sib luag ntawm LTPS substrate. Cov iav yog siv los tiv thaiv cov cua thiab dej nkag mus rau hauv txheej txheej ntawm lub iav thiab lub vaj huam sib luag, ua rau raug laser melting thiab tua kom nplaum thiab iav vaj huam sib luag. Sab qaum sab yog kaw los ntawm iav frit seal, oxygen thiab noo noo, cov khoom siv hauv cov hluav taws xob OLED tuaj yeem ua rau nws muaj nuj nqi yam tsis muaj kev puas tsuaj.