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Tus Qauv Tsav Tsheb Ntawm OLED

May 02, 2018

Kev tsav tsheb ntawm OLED muab faib ua tsav tsheb (active tsav) thiab tsav tsheb npav (passive tsav).


passive tsav (PM OLED)

Nws yog muab faib ua ib qho kev sib tw khiav zoo li qub thiab txoj kev tsav tsheb khiav ceev.

1. Hom kev nrawm nruj: nyob rau hauv lub nrig txog kev lag luam organic teeb emitting zaub, cov cathode ntawm cov organic organic electroluminescent pixels txuas nrog ua ke, thiab qhov anode ntawm txhua pixel yog sib cais los ntawm txhua lwm. Qhov no yog hom kev txuas tshaj. Yog hais tias lub pixel yuav tsum tau sib txawv qhov sib txawv ntawm qhov voltage ntawm qhov tam sim no qhov chaw thiab cov cathode, lub pixel yuav raug tsav los ntawm ib qho tam sim no qhov chaw. Yog hais tias ib qho pixel tsis ci, qhov anode yuav txuas nrog rau qhov tsis muaj qhov tsis zoo, thiab nws tuaj yeem hloov tau. Txawm li cas los xij, tej zaum yuav muaj kev cuam tshuam thaum muaj ntau yam hauv cov duab. Yuav kom tsis txhob xav tau kev sib txuas lus, Qhov kev sib tw hauv plab yog siv rau kev tsav tsheb rau lub voj voog ntawm segmental.


2. Dynamic tsav hom: ntawm ib qho khoom siv hluav taws xob-tso tawm cov khoom siv hluav taws xob, ob lub electrodes yog ua rau cov qauv matrix, uas yog, ib pawg kab sib chaws ntawm cov electrodes uas tso saib tib yam khoom ntawm lub pixels raug sib koom, thiab lwm yam electrode uas qhia txog tib yam khoom ntawm pixels nyob rau hauv ib pab pawg neeg ntsug yog sib koom. Yog pixels faib tau N Nce thiab M kab, nws muaj cov kab Electrodes N thiab M kab electrodes. Cov kab thiab txhua kab sib haum mus rau ob lub electrodes ntawm lub luminescent pixel feem. Ntawd yog, cathode thiab anode. Nyob rau hauv lub chav kawm ntawm Circuit Court lub sij, nws yog ib qho tsim nyog rau lub teeb pixels kab los ntawm kab los yog lub teeb pixels los ntawm kem, feem ntau los ntawm txoj kab los ntawm kab xa khoom, kab kev xaav, thiab sab electrodes raws li cov ntaub ntawv electrodes. Txoj kev xav tau yog thov Pulse rau txhua kab ntawm electrodes ncig, thiab tag nrho cov sab electrodes muab tsav tsheb tam sim no ntawm kab pixel, yog li ua kom pom cov duab ntawm tag nrho cov pixels. Tus kab no tsis tso tib yam kab los yog tib sab ntawm pixels nrog qhov rov qab voltage kom tsis txhob muaj "cross effect". Lub luam theej duab yog ua tiav, thiab lub sijhawm yuav tsum tau luam tawm txhua kab yog hu ua lub voj voog.


Hauv txhua lub vojvoog, lub sijhawm xaiv ntawm txhua kab yog sib npaug zos. Nws yog assumed tias tus lej ntawm cov kab hauv ib kab yog N, thiab lub sijhawm ntawm ib kab yog 1, ces tus nqi ntawm qhov 1 \ / N uas muaj kab nyob hauv ib lub sij hawm yog hu ua lub luag hauj lwm tus nqi coefficient. Nyob rau tib qho tam sim no, qhov nce ntawm tus lej ntawm cov kab txuas yuav txo qhov kev luag hauj lwm piv, uas ua rau kev poob ntawm qhov kev txhaj tshuaj tam sim no rau cov organic electroluminescent pixels nyob hauv ib lub thav duab, thiab txo cov zaub zoo. Yog li ntawd, nrog rau kev nthuav tawm ntawm cov duab pixels, thiaj li ua kom muaj qhov zoo ntawm cov zaub, nws tsim nyog los txhim kho tus tsav tsheb tam sim no los sis txais yuav qhov kev ntsuam xyuas ob lub tshuab electrode los txhim kho tus nqi zog coefficient.


Ntxiv nrog rau qhov cov teeb meem tshwm sim ntawm cov electrodes, qhov mechanism ntawm kev sib txuas ntawm cov zoo thiab tsis zoo tus nqi muaj nyob rau hauv cov organic electroluminescent zaub vaj huam sib luag ua rau ob yam luminous pixels, ntev li ib qho ntawm lub siab ua haujlwm uas tshwm sim tawm lawv cov qauv ncaj qha ua ke, thiab muaj tej zaum yuav muaj lub plhaub tiab ntawm ob lub luminescent pixels. Ntawd yog, ib qho pixel glowing thiab lwm pixel yuav muab tawm lub zog tsis muaj zog. Cov phenomenon no mas vim yog lub plab tsis muaj plab hnyuv quav ntawm cov khoom siv cev nqaij daim tawv thiab cov pluag tsis zoo ntawm cov yeeb yaj kiab. Los ntawm txoj kev pom ntawm kev tsav tsheb, txhawm rau ua kom txhua tus neeg tsis pom kev zoo no, nws tseem yog ib txoj hauv kev zoo tshaj plaws uas yuav tau txais kev txiav txim siab hnub kawg.


Tso nrog rau kev tswj grayscale: qhov ntsuas ntawm cov zauv seem ntawm cov teeb pom kev zoo ntawm cov xim dub thiab dawb. Qhov ntau grey qib yog, lub richer cov duab yuav los ntawm dub mus dawb, thiab lub dlaim phaj cov lus yuav. Grayscale yog ib qho tseem ceeb heev rau kev pom duab thiab xim. Feem ntau, qhov kev tshuaj ntsuam nrog grayscale zaub yog feem ntau qhov teeb duab matrix, thiab nws tsav tsheb kuj yog ib qho tseem ceeb heev. Muaj ntau txoj kev los paub cov kev tswj grey yog tswj txoj kev tswj, qhov chaw nruab nrab ntawm qhov siv dav hlau grading thiab lub sij hawm grey sij hawm.


active tsav (AM OLED)

Txhua tus pixel ntawm lub tshuab tsav yog nruab nrog ib qho kev ua haujlwm ntawm cov xim tsis tshua muaj cov roj polysilicon thin zaj duab xis transistors (LowTemperature Poly-Si Thin Film Transistor, LTP-Si TFT), thiab txhua pixel nruab nrog tus nqi them rau daim fais fab, thiab lub tshuab hluav taws xob peripheral thiab tag nrho lub cev ntawm cov duab array muaj kev koom rau tib iav substrate. Tus qauv TFT tib yam li LCD tsis siv rau OLED. Qhov no yog vim hais tias lub LCD yog tsav los ntawm ib qho hluav taws xob, thiab OLED nyob ntawm tus tsav tam sim no, thiab nws txoj kev ci tseem ceeb rau cov nqi tam sim no, yog li ntxiv rau qhov chaw ntawm ON / OFF switching action, tus tsav me me TFT, uas tuaj yeem tso cai txaus tam sim no kom txaus los ntawm lub sijhawm tam sim no, yog yuav tsum tau ua.


Tus nquag tsav tsheb yog hom tsav tsheb zoo li qub, uas muaj kev txuag cia thiab muaj peev xwm tsav los ntawm 100% load. Cov tsav no tsis yog txwv los ntawm cov xov tooj ntawm scanned electrodes, thiab tuaj yeem kho ntawm txhua tus pixel.


  

Tus nquag tsav tsheb tsis muaj lub luag haujlwm tseem ceeb. Tus tsav tsheb tsis txwv los ntawm cov xov tooj ntawm cov tshuab electrodes, thiab nws yog ib qho yooj yim mus cuag cov ci ntsa iab thiab siab.


Tus neeg tsav tsheb muaj peev xwm tuaj yeem hloov kho qhov kaj ci ntsa iab ntawm pink liab thiab xiav, uas yog qhov ntau ntawm cov xim ntawm OLED.


Tus tsav tsheb khiav ntawm tus qauv matrix yog muab zais rau hauv cov vijtsam zaub, thiab nws yog qhov yooj yim kom paub qhov kev sib tos thiab kev siv me me. Tsis tas li ntawd, vim txoj kev sib txuas ntawm lub peripheral tsav Circuit Court thiab qhov screen, qhov no pab txoj kev tawm los thiab kev cia siab rau ib qhov twg.