A yau, tare da saurin haɓakar LEDs, manyan LEDs masu ƙarfi suna cin gajiyar yanayin. A halin yanzu, babbar matsalar fasaha ta hasken wutar lantarki mai ƙarfi na LED shine zubar da zafi. Rashin ƙarancin zafi yana haifar da ikon tuƙi na LED da capacitors na lantarki. Ya zama ɗan gajeren allo don ƙarin haɓakar hasken LED. Dalilin tsufa na tushen hasken LED.
A cikin tsarin fitilu ta amfani da tushen hasken LED, saboda hasken hasken LED yana aiki a cikin ƙananan ƙarfin lantarki (VF = 3.2V), babban halin yanzu (IF = 300-700mA) yanayin aiki, don haka zafi yana da tsanani sosai. Wurin fitilun gargajiya yana da kunkuntar, kuma yana da wahala ga radiator na ƙananan yanki don fitar da zafi da sauri. Duk da karɓar nau'o'in tsare-tsare na sanyaya, sakamakon ba shi da kyau, ya zama fitilun fitilu na LED matsala ba tare da bayani ba.
A halin yanzu, bayan kunna wutar lantarki ta LED, kashi 20 - 30% na makamashin lantarki yana canzawa zuwa makamashin haske, kuma kusan kashi 70% na makamashin lantarki yana canza zuwa makamashin thermal. Sabili da haka, shine mabuɗin fasaha na ƙirar tsarin fitilar fitila don fitar da makamashi mai zafi da wuri-wuri. Ƙarfin zafi yana buƙatar watsawa ta hanyar tafiyar da zafi, zafi mai zafi da radiation zafi.
Yanzu bari mu bincika abin da dalilai ke haifar da abin da ya faru na LED hadin gwiwa zafin jiki:
1. Ayyukan ciki na ciki ba su da yawa. Lokacin da aka haɗa electron tare da rami, ba za a iya samar da photon 100% ba, wanda yawanci yana rage yawan sake haɗawa na yanki na PN saboda "leakage na yanzu". Yayyo halin yanzu lokutan ƙarfin lantarki shine ikon wannan ɓangaren. Wato, yana canzawa zuwa zafi, amma wannan bangare bai mamaye babban bangaren ba, saboda ingancin photons na ciki ya riga ya kusan kusan 90%.
2. Babu wani daga cikin photon da aka samar a ciki da zai iya harba a waje da guntu, kuma wani ɓangare na babban dalilin da ya sa wannan ya zama makamashin zafi shine cewa wannan, wanda ake kira External quantum efficiency, kusan kashi 30% ne kawai, yawancin su suna canzawa zuwa. zafi.
Sabili da haka, zubar da zafi yana da mahimmancin mahimmanci wanda ke shafar ƙarfin hasken wutar lantarki na LED. Ƙunƙarar zafi na iya magance matsalar ɓarkewar zafi na ƙananan fitilu masu haske, amma zafi mai zafi ba zai iya magance matsalar zafi na fitilu masu ƙarfi ba.
LED sanyaya mafita:
Rashin zafi na Led yana farawa ne daga bangarori biyu: zafin zafi na Led guntu kafin da bayan kunshin da zafi na fitilar Led. Led guntu zafi dissipation ne yafi alaka da substrate da kewaye zabar tsari, domin kowane LED iya yin fitila, don haka zafi samar da LED guntu a karshe ya tarwatsa cikin iska ta cikin fitilu gidaje. Idan zafi bai bace da kyau ba, ƙarfin zafi na guntu na LED zai zama ƙanƙanta sosai, don haka idan an tara wasu zafi, yanayin haɗin guntu zai ƙaru da sauri, kuma idan yana aiki a babban zafin jiki na dogon lokaci, za a gajarta rayuwar da sauri.
Gabaɗaya magana, radiators za a iya raba aiki sanyaya da m sanyaya bisa ga hanyar a cikin abin da zafi da aka cire daga radiators.Passive zafi dissipation shi ne ta halitta dissipate da zafi na zafi tushen LED haske Madogararsa a cikin iska ta cikin zafi nutse. kuma tasirin zafin zafi yana daidai da girman ma'aunin zafi da zafi. Sanyaya mai aiki shine a tilastawa kashe zafin da zafin rana ke fitarwa ta na'urar sanyaya kamar fanfo. Ana nuna shi ta hanyar haɓakar zafi mai zafi da ƙananan girman na'urar. Ana iya raba sanyaya mai aiki zuwa sanyaya iska, sanyaya ruwa, sanyaya bututu mai zafi, sanyaya semiconductor, sanyaya sinadarai da sauransu.
Gabaɗaya, talakawa masu sanyaya iska ya kamata a dabi'ance su zaɓi ƙarfe azaman kayan na'urar. Saboda haka, a cikin tarihin ci gaban radiators, abubuwa masu zuwa sun bayyana: tsantsa na aluminum radiators, tsantsa na jan karfe, da fasahar haɗin jan karfe-aluminum.
Gabaɗayan ingantaccen haske na LED yana da ƙasa, don haka zafin haɗin gwiwa yana da girma, yana haifar da gajeriyar rayuwa. Don tsawaita rayuwa da rage yawan zafin jiki na haɗin gwiwa, wajibi ne a kula da matsalar rashin zafi.