Fasahar Gano Hasken LED gama gari
Akwai babban bambance-bambance tsakanin tushen hasken LED da tushen hasken gargajiya dangane da girman jiki da haske mai haske, bakan, da rarraba sarari na ƙarfin haske. Ganewar LED ba zai iya kwafin matakan ganowa da hanyoyin hanyoyin hasken gargajiya ba. Editan yana gabatar da fasahar gano fitilun LED gama gari.
Gano sigogin gani na fitilun LED
1. Luminous tsanani ganewa
Ƙarfin haske, ƙarfin haske, yana nufin adadin hasken da ke fitowa a cikin takamaiman kusurwa. Saboda hasken da aka tattara na LED, dokar murabba'i mai juzu'i ba ta aiki a ɗan gajeren nesa. Ma'aunin CIE127 yana ba da ma'auni guda biyu hanyoyin ma'auni don auna ƙarfin haske: yanayin ma'auni A (yanayin filin nesa) da yanayin ma'auni B (kusa da yanayin filin). A cikin jagorancin hasken haske, yanki na mai ganowa a cikin yanayi biyu shine 1 cm2. A al'ada, ana auna ƙarfin haske ta amfani da daidaitaccen yanayin B.
2. Haske mai haske da gano tasirin haske
Luminous flux shine jimlar adadin hasken da ke fitowa daga hasken, wato adadin hasken da ke fitowa. Hanyoyin ganowa galibi sun haɗa da nau'ikan nau'ikan 2 masu zuwa:
(1) Hanyar haɗin kai. Haske madaidaicin fitilar da fitilar da ke ƙarƙashin gwaji bi da bi a cikin yanayin haɗawa, da yin rikodin karatunsu a cikin mai canza wutar lantarki kamar Es da ED, bi da bi. An san daidaitaccen motsin haske Φs, sannan ma'aunin hasken da aka auna ΦD = ED × Φs / Es. Hanyar haɗin kai tana amfani da ka'idar "madogarar haske", wanda yake da sauƙi don aiki, amma ya shafi yanayin zafin launi na daidaitattun fitilar da fitilar da ke ƙarƙashin gwaji, kuskuren auna yana da girma.
(2) Spectroscopy. Ana ƙididdige madaidaicin haske daga rarrabawar makamashi P (λ). Yin amfani da monochromator, auna bakan 380nm ~ 780nm na daidaitaccen fitilar a cikin yanayin haɗin kai, sannan auna bakan fitilar a ƙarƙashin gwaji a ƙarƙashin yanayi iri ɗaya, kuma ƙididdige hasken fitilar a ƙarƙashin kwatanta.
Tasirin haske shine rabon haske mai haske wanda tushen hasken ke fitarwa zuwa ikon da yake cinyewa. Yawancin lokaci, ana auna tasirin hasken LED ta hanyar yau da kullun.
3.Spectral halayyar ganewa
Gano halayen bakan LED ya haɗa da rarraba wutar lantarki, daidaitawar launi, zafin launi, da ma'anar ma'anar launi.
Rarraba wutar lantarki na nuni da cewa hasken tushen hasken ya ƙunshi nau'i-nau'i masu yawa na tsayin raƙuman ruwa daban-daban, kuma ƙarfin radiation na kowane tsayin raƙuman ma ya bambanta. Wannan bambancin ana kiransa rarraba wutar lantarki ta kallon haske bisa ga tsari na tsawon zango. Ana amfani da Spectrophotometer (monochromator) da daidaitaccen fitila don kwatanta da auna tushen hasken.
Haɗin baƙar fata adadi ne wanda ke wakiltar launin hasken haske na tushen haske akan ginshiƙi mai daidaitawa ta hanyar dijital. Akwai tsarin daidaitawa da yawa don jadawali daidaita launi. Ana amfani da tsarin haɗin gwiwar X da Y.
Yanayin launi shine adadin da ke nuna teburin launi (bayanin launi na bayyanar) na tushen haske kamar yadda idon ɗan adam ya gani. Lokacin da hasken da ke fitowa daga hasken ya kasance launi ɗaya da hasken da cikakken baƙar fata ke fitowa a wani yanayin zafi, zafin jiki shine yanayin launi. A fagen haske, zafin launi shine muhimmin ma'auni wanda ke kwatanta halayen gani na tushen haske. Ka'idar da ke da alaƙa da yanayin launi ta samo asali ne daga baƙar fata radiation, wanda za'a iya samuwa daga daidaitawar launi da ke dauke da wurin baƙar fata ta hanyar haɗin launi na tushen haske.
Fihirisar ma'anar launi tana nuna adadin hasken da tushen hasken ke nunawa wanda ke nuna daidai launi na abu. Yawanci ana bayyana shi ta babban ma'anar ma'anar launi Ra, inda Ra shine matsakaicin lissafin lissafin ma'anar launi na samfuran launi takwas. Ma'anar ma'anar launi shine muhimmin ma'auni na ingancin hasken haske, yana ƙayyade iyakar aikace-aikacen tushen hasken, kuma inganta alamar ma'anar launi na farin LED yana ɗaya daga cikin muhimman ayyuka na bincike da ci gaba na LED.
4.Light tsanani rarraba gwajin
Dangantakar da ke tsakanin hasken haske da kusurwar sararin samaniya (shugabanci) ana kiransa rarraba ƙarfin hasken ƙarya, kuma rufaffiyar lankwasa da aka kafa ta wannan rarraba ana kiranta hasken wutar lantarki. Domin akwai ma'aunin ma'auni da yawa, kuma kowane batu ana sarrafa shi ta hanyar bayanai, yawanci ana auna shi ta hanyar na'urar rarrabawa ta atomatik.
5.Tasirin sakamako na zafin jiki akan halaye na gani na LED
Zazzabi zai shafi halayen gani na LED. Yawancin gwaje-gwaje na iya nuna cewa zafin jiki yana rinjayar bakan fitarwa na LED da daidaita launi.
6. Ma'aunin haske na saman
Hasken tushen haske a wata hanya ita ce ƙarfin hasken hasken a cikin yanki da aka yi hasashe a wannan hanya. Gabaɗaya, ana amfani da mitoci masu haske na saman ƙasa da mitoci masu haske don auna hasken saman.
Auna sauran sigogin aikin fitilun LED
1.Ma'auni na sigogi na lantarki na fitilun LED
Siffofin lantarki galibi sun haɗa da gaba, jujjuya wutar lantarki da jujjuya halin yanzu, waɗanda ke da alaƙa da ko fitilar LED zata iya aiki akai-akai. Akwai nau'ikan ma'aunin ma'aunin lantarki na fitilun LED nau'ikan nau'ikan nau'ikan nau'ikan lantarki guda biyu: ana gwada ma'aunin wutar lantarki a ƙarƙashin wani takamaiman halin yanzu; kuma ana gwada siga na yanzu a ƙarƙashin wutar lantarki akai-akai. Takamammen hanyar ita ce kamar haka:
(1) Wutar lantarki ta gaba. Yin amfani da na'urar gaba zuwa fitilun LED da za a gano zai haifar da faɗuwar wutar lantarki a ƙarshensa. Daidaita tushen wutar lantarki tare da ƙimar halin yanzu kuma rikodin karatun da ya dace akan voltmeter na DC, wanda shine wutar lantarki na gaba na fitilar LED. Dangane da ma'anar da ta dace, lokacin da LED ke gaba, juriya kaɗan ne, kuma hanyar waje na ammeter ya fi daidai.
(2) Juya halin yanzu. Aiwatar da juyar da wutar lantarki zuwa fitilun LED da aka gwada kuma daidaita tsarin samar da wutar lantarki. Karatun ammeter shine juzu'in fitilun LED da aka gwada. Daidai ne da auna ƙarfin wutar lantarki na gaba, saboda LED yana da babban juriya lokacin da yake gudanar da juyawa.
2, Gwajin halayen thermal na fitilun LED
Halayen thermal na LEDs suna da tasiri mai mahimmanci akan halayen gani da na lantarki na LEDs. Juriya na thermal da junction zafin jiki sune manyan halayen thermal na LED2. Ƙarfafawar thermal yana nufin juriya na thermal tsakanin haɗin PN da farfajiyar shari'ar, wanda shine rabon bambancin zafin jiki tare da tashar zafi mai zafi zuwa wutar da aka watsar a tashar. Yanayin junction yana nufin zafin mahaɗin PN na LED.
Hanyoyin auna zafin mahaɗar LED da juriya na zafi gabaɗaya sune: hanyar infrared micro-imager, Hanyar spectrometry, hanyar sigar lantarki, hanyar bincikar juriya ta photothermal da sauransu. An auna zafin guntu na LED azaman yanayin mahaɗar LED tare da microscope na infrared ko ƙaramin thermocouple, kuma daidaito bai isa ba.
A halin yanzu, ana amfani da hanyar siga na lantarki don yin amfani da alakar layi tsakanin jun jun wutar lantarki na gaba na mahadar LEDPN da zazzabi na mahadar PN, da samun madaidaicin madaidaicin LED ta hanyar auna bambanci a faɗuwar wutar lantarki ta gaba a. yanayi daban-daban.