Taw qhia
Raws li LED zaub kev lag luam thawb mus rau me me pixel pitches thiab siab dua pixel ntom, tswj cov cua sov tsim nyob rau hauv cov zaub tau dhau los ua ib qho kev sib tw hauv engineering. High-cov ntxaij vab tshaus LED ntom ntom ntim ntau txhiab lub teeb- emitting diodes rau hauv qhov chaw kaw ntom nti ua kom muaj zog thermal. Yog tias tsis muaj thermal dissipation zoo, qhov kev tsim hluav taws xob no ncaj qha cuam tshuam rau lub vijtsam cov khoom, kev ua haujlwm zoo, thiab kev ua haujlwm tag nrho.
Vim li cas Kev Tswj Xyuas Thaum Tshav Kub Kub rau LED Zaub
Ib qho LED (Lub Teeb Emitting Diode) yog ib qho khoom siv hluav taws xob uas hloov hluav taws xob rau hauv lub teeb. Txawm li cas los xij, tsuas yog ib feem ntawm lub zog no yog emitted raws li pom lub teeb; seem seem yog hloov dua siab tshiab rau hauv tshav kub. Nyob rau hauv siab -cov ntxaij vab tshaus ceev, lub thermal zog no sib sau ua ke sai heev vim qhov ze ntawm pixels.
- Luminous Efficiency thiab Brightness Degradation: Kev ua haujlwm siab kub txo cov quantum efficiency ntawm LED chips. Raws li kev sib tshuam kub nce, qhov ci ntsa iab ntawm diodes poob, ua rau kev txo qis hauv kev ua haujlwm ntawm cov zaub.
- Xim Hloov: Cov xim sib txawv LEDs (Liab, Ntsuab, Xiav) qhia qhov sib txawv ntawm qhov kub thiab txias. Red LEDs, piv txwv li, yog cov rhiab heev rau cua sov thiab muaj kev hloov pauv sai dua thiab qhov ci ntsa iab dua li xiav thiab ntsuab. Qhov kev coj cwj pwm tsis sib xws no ua rau pom cov xim txawv txav thiab tsis zoo ntawm qhov tsis zoo.
- Shortened Lifespan: Lub sij hawm ntev raug kub siab ua rau lub degradation ntawm cov khoom ntim, cov pob qij txha, thiab tsav ICs. Nws txo qis qhov raug 100,000-teev kev ua haujlwm ntawm lub diodes.
Thaum tshav kub kub Dissipation Mechanisms
Niaj hnub nimno siab - qhov ceev LED cov lus siv kev sib xyaw ua ke ntawm kev tsim kho tshuab thiab cov khoom siv tshawb fawb los ua kom cov cua sov tau zoo.
- Cov Khoom Siv Hluav Taws Xob (Thermal Interface Materials - TIMs).: Txhawm rau txuas qhov sib txawv ntawm cov cua sov- tsim ICs (kev sib koom ua ke) thiab cov txheej txheem hlau txee, cov tuam txhab siv high - conductivity thermal pads lossis roj. Qhov no ua kom muaj kev hloov pauv sai sai ntawm cov ntawv luam tawm Circuit Board (PCB).
- Aluminium txee Architecture (Passive Dissipation).: Tuag-cam khwb cia txhuas cov khoom siv tau zoo heev rau cov ntxaij vab tshaus sab hauv tsev thiab sab nraum zoov tsis yog rau lawv qhov hnyav dua, tab sis kuj rau lawv cov thermal conductivity zoo dua piv rau cov ntawv hlau ib txwm muaj. Tag nrho cov qauv hlau rov qab ua raws li lub dab dej loj heev, ua kom muaj cua sov ib txwm ua rau huab cua puag ncig.
- Kev ua haujlwm ntawm qhov cua thiab kiv cua kev sib koom ua ke (Active Cooling).: Nyob rau hauv ib puag ncig uas kub ambient kub, passive txias tej zaum yuav ua ke nrog active systems. Cov tswv yim tso tawm qis- suab nrov, siab- kiv cua nrawm rub cua txias los ntawm cov cua nkag thiab tshem tawm cov cua kub, tswj kom muaj qhov sib npaug ntawm cov txee sab hauv.
- Common Cathode Tsav Technology: Raws li kev tsim kho vaj tsev, cov cuab yeej siv cathode siv tau meej, cais cov hluav taws xob rau Liab (feem ntau 2.8V) thiab Ntsuab / Xiav (feem ntau 3.8V) chips es tsis txhob ntawm ib kab 5V. Los ntawm kev tshem tawm qhov hluav taws xob ntau dhau los ntawm Red diode, kev siv hluav taws xob thiab kev tsim hluav taws xob tom qab raug txo qis ntawm qhov chaw mus txog 20-30%.
Xaus
Nyob rau hauv siab - qhov ceev LED teeb, kev tswj thermal tsis yog ib qho kev xaiv nkaus xwb tab sis yog qhov tseem ceeb ntawm kev ntseeg siab ntawm lub cev. Kev xaiv cov khoom tsim nrog cov thermal thermal-cov ntaub ntawv conductivity, optimized aluminium structures, thiab lub zog-kev tsav tsheb zoo ua kom ntseeg tau tias lub vijtsam muab qhov pom kev zoo ib yam thiab tswj lub neej ua haujlwm ruaj khov rau xyoo tom ntej.