LED teeb thiab lwm cov kev ua tau zoo ntawm kev ntsuas
1, LED teeb hluav taws xob tsis txog kev ntsuas
Hluav taws xob tsis zoo, xam nrog rau pem hauv ntej, nrawm voltage thiab thim rov qab tam sim no, muaj feem xyuam rau qhov kev lag luam ntawm cov roj teeb, LED teeb tsa los txiav txim seb qhov kev ua tau zoo ntawm ib qhov hauv paus. LED teeb muaj ob hom kev ntsuas hluav taws xob: qhov tam sim no yog qee qhov kev tshwm sim, qhov kev ntsuas tsis raug; voltage yuav tsum yog cov ntaub ntawv, kev kuaj tsis tam sim no. Cov hom kev qhia yog raws li hauv qab no:
(1) F qhov hluav taws xob. Qhov zoo tam sim no yog siv rau LED teeb txhom tau, thiab ib qhov poob siab voltage yog generated ntawm ob hnub. Kho cov nqi tam sim no los txiav txim xyuas lub hwj huam, sau cov DC voltmeter rau cov kev nyeem ntawv, uas yog, cov teeb nyob rau pem hauv ntej thev hlau. Raws li qhov kev paub zoo, LED zoo conduction, qhov tsis kam yog qhov me me, kev siv lub ammeter sab nraud ntau dua.
(2) R everse tam sim no. Yuav kom paub tias cov teeb pom kev zoo ntawm cov roj teeb hluav taws xob, hloov lub hwj huam, ntsuas lub cav ntsuas yog qhov ntsuas teeb ntawm lub teeb rov qab tam sim no. Thiab ntsuas qhov zoo qhov hluav taws xob nrog tib qho laj thawj, vim tias qhov rov qab ua txoj kev tswj hwm thaum tus loj dua, siv lub tshuab hluav taws xob sab hauv.
2, LED teeb thermal properties test
LED thermal thaj chaw, cov khoom siv hluav taws xob, cov khoom hluav taws xob muaj feem tseem ceeb. Thermal tsis kam thiab qhov kub thiab txias, yog lub ntsiab thermal ntawm LED2. Thermal raug hais txog thermal ua hauj siab ntawm lub PN hlawv thiab lub plhaub ntawm lub plhaub, piv txwv li qhov sib txawv ntawm qhov kub qhov sib txawv raws cov tshav kub txoj kev mus rau lub hwj chim dissipated ntawm cov channel. Lub qhov cub tshav kub yog qhov kub ntawm PN hlws tsev ntawm LED.
Ntsuas LED hlwv qhov kub thiab thermal ua hauj lwm yog: Infrared micro-instrument method, spectroscopy, hluav taws xob tsis, thermal kuj xa roj teeb hom. Siv cov thermometer hauv tshuab ntsuas kub lossis cov thermocouple ntsuas kub ntiv taw kub li kub qhov kub qhov kub, qhov tseeb tsis txaus.
Tam sim no, feem ntau siv hluav taws xob parameter hom yog txoj kev sib raug ntawm cov pem hauv ntej voltage ntawm LEDP txuas thiab PN qhov kub thiab txias. Lub qhov cub tshav kub ntawm LED yog ntsuas los ntawm kev ntsuas rau pem hauv ntej voltage nco ntawm txawv kub.
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