LEDan san shi azaman tushen haske na ƙarni na huɗu ko tushen hasken kore.Yana da halaye na ceton makamashi, kare muhalli, tsawon rayuwar sabis da ƙananan ƙara.Ana amfani da shi sosai a fannoni daban-daban kamar nuni, nuni, ado, hasken baya, hasken gabaɗaya da yanayin dare na birni.Dangane da ayyuka daban-daban, ana iya raba shi zuwa rukuni biyar: nunin bayanai, fitilar sigina, fitilun abin hawa, hasken baya na LCD da hasken gabaɗaya.

Na al'adaLED fitilusuna da gazawa kamar rashin isasshen haske, wanda ke haifar da ƙarancin shiga.Fitilar LED ta wutar lantarki tana da fa'idodin isassun haske da tsawon rayuwar sabis, amma wutar lantarki tana da matsalolin fasaha kamar marufi.Anan akwai taƙaitaccen bincike na abubuwan da ke shafar ingancin haƙar haske na marufi na LED.

Abubuwan tattarawa da ke shafar haɓakar haɓakar haske

1. Fasahar watsar zafi

Don diode mai haske wanda ya ƙunshi haɗin PN, lokacin da na'urar gaba ke gudana daga mahadar PN, haɗin PN yana da asarar zafi.Wadannan zafi suna haskakawa a cikin iska ta hanyar manne, kayan tukwane, kwandon zafi, da dai sauransu a cikin wannan tsari, kowane bangare na kayan yana da tasirin zafi don hana zafi, wato, juriya na thermal.Juriya na thermal ƙayyadaddun ƙima ne da aka ƙaddara ta girman, tsari da kayan na'urar.

Bari juriya na thermal na LED ya zama rth (℃ / W) kuma ikon watsawar thermal ya zama PD (W).A wannan lokacin, yanayin junction na PN sakamakon asarar thermal na yanzu yana tashi zuwa:

T(℃)=Rth&TIME;PD

Yanayin mahaɗin PN:

TJ=TA+Rth&TIME;PD

Inda TA shine yanayin zafi.Haɓakar zafin haɗin gwiwa zai rage yuwuwar haɗuwar haɗin haske mai fitar da hasken PN, kuma hasken LED zai ragu.A lokaci guda kuma, saboda haɓakar yanayin zafi da ke haifar da asarar zafi, hasken LED ba zai ƙara ƙaruwa gwargwadon halin yanzu ba, wato yana nuna yanayin zafi.Bugu da ƙari, tare da haɓakar yanayin junction, tsayin tsayin haske na haske zai kuma ja da baya zuwa doguwar shugabanci, kusan 0.2-0.3nm / ℃.Don farin LED ɗin da aka samu ta hanyar haxa YAG phosphor mai rufaffen guntu mai shuɗi, ɗigon shuɗi mai tsayi zai haifar da rashin daidaituwa tare da tsayin motsin phosphor, don rage ingantaccen ingantaccen haske na farin LED da canza yanayin zafin launi na farin haske.

Don hasken wutar lantarki, yanayin tuƙi gabaɗaya ya fi ɗaruruwan Ma, kuma yawan junction na PN na yanzu yana da girma sosai, don haka haɓakar zafin jiki na mahaɗin PN a bayyane yake.Don marufi da aikace-aikace, yadda za a rage thermal juriya na samfurin da kuma sanya zafi da aka haifar ta hanyar PN junction da wuri-wuri ba zai iya kawai inganta jikewa halin yanzu na samfurin da kuma inganta luminous ingancin samfurin, amma kuma inganta ingancin samfurin. aminci da rayuwar sabis na samfurin.Don rage juriya na thermal na samfurori, da farko, zaɓin kayan tattarawa yana da mahimmanci musamman, ciki har da ƙoshin zafi, m, da sauransu. .Abu na biyu, ƙirar tsarin ya kamata ya zama mai ma'ana, haɓakar zafin jiki tsakanin kayan yakamata a ci gaba da daidaitawa, kuma haɓakar zafin jiki tsakanin kayan yakamata a haɗa shi da kyau, don guje wa ƙwanƙarar ƙarancin zafi a cikin tashar sarrafa zafi kuma tabbatar da zubar da zafi daga ciki zuwa Layer na waje.A lokaci guda kuma, wajibi ne don tabbatar da cewa zafi ya ɓace a cikin lokaci bisa ga tashar tashar zafi da aka riga aka tsara.

2. Zaɓin filler

Bisa ka'idar refraction, lokacin da haske ya faru daga matsakaici mai haske zuwa matsakaici mai haske, lokacin da kusurwar abin da ya faru ya kai wani ƙima, wato, mafi girma ko daidai da kusurwa mai mahimmanci, cikakken fitarwa zai faru.Don guntu mai shuɗi na GaN, ma'aunin ma'aunin GaN shine 2.3.Lokacin da haske ya fito daga ciki na crystal zuwa iska, bisa ga ka'idar refraction, mahimmin kusurwa θ 0=sin-1(n2/n1).

Inda N2 yayi daidai da 1, wato ma'aunin iskar iska, kuma N1 shine ma'aunin refractive na Gan, daga inda aka lissafta mahimmin kusurwar θ 0 yana kusan digiri 25.8.A wannan yanayin, kawai hasken da za'a iya fitarwa shine hasken da ke cikin kusurwa mai ƙarfi tare da kusurwar abin da ya faru ≤ 25.8 digiri.An ba da rahoton cewa ingancin jimla na waje na Gan guntu shine kusan 30% - 40%.Saboda haka, saboda ciki na ciki na guntu crystal, rabon hasken da za a iya fitarwa a waje da crystal kadan ne.An ba da rahoton cewa ingancin jimla na waje na Gan guntu shine kusan 30% - 40%.Hakazalika, hasken da ke fitowa daga guntu ya kamata a watsa shi zuwa sararin samaniya ta hanyar kayan marufi, kuma ya kamata a yi la'akari da tasirin abin da ke tattare da ingancin hasken.

Don haka, don haɓaka haɓakar haɓakar haske na marufi na samfuran LED, ƙimar N2 dole ne a ƙara haɓaka, wato, dole ne a ƙara madaidaicin marufi don haɓaka madaidaicin kusurwar samfurin, don haɓaka marufi. ingantaccen ingancin samfurin.A lokaci guda, hasken haske na kayan tattarawa ya kamata ya zama ƙananan.Don inganta yawan hasken da ke fita, siffar kunshin ya fi dacewa da arched ko hemispherical, don haka lokacin da hasken ya fito daga kayan marufi zuwa iska, ya kusan zama daidai da mahallin, don haka babu cikakken tunani.

3. Yin tunani

Akwai manyan abubuwa guda biyu na sarrafa tunani: ɗaya shine sarrafa tunani a cikin guntu, ɗayan kuma shine hasken haske ta hanyar tattara kayan.Ta hanyar aiwatar da tunani na ciki da na waje, ana iya inganta yanayin jujjuyawar hasken da ke fitowa daga guntu, ana iya rage ɗaukar guntu na ciki, kuma ana iya haɓaka ingantaccen ingancin samfuran LED.Dangane da marufi, LED ɗin wuta yawanci yana haɗa guntuwar wutar lantarki akan tallafin ƙarfe ko ƙasa tare da rami mai tunani.The support irin tunani rami gabaɗaya rungumi dabi'ar electroplating don inganta tunani sakamako, yayin da tushe farantin tunani kogon kullum rungumi dabi'ar polishing.Idan zai yiwu, electroplating magani za a za'ayi, amma a sama biyu jiyya hanyoyin suna shafar mold daidaito da kuma tsari, The sarrafa tunani rami yana da wani tunani sakamako, amma shi ne ba manufa.A halin yanzu, saboda rashin isasshen polishing daidaito ko hadawan abu da iskar shaka na karfe shafi, da tunani sakamako na substrate irin tunani rami sanya a kasar Sin ne matalauta, wanda take kaiwa zuwa mai yawa haske da ake tunawa bayan harbi a cikin tunani yankin da kasa da za a iya nuna zuwa ga haske mai fitar da haske bisa ga abin da ake sa ran, yana haifar da ƙarancin haɓakar hasken haske bayan marufi na ƙarshe.

4. Zaɓin phosphor da sutura

Don farar wutar lantarki LED, haɓaka haɓakar haske kuma yana da alaƙa da zaɓi na phosphor da magani.Don haɓaka haɓakar haɓakar phosphor na shuɗi mai shuɗi, da farko, zaɓin phosphor yakamata ya dace, gami da tsayin motsin motsi, girman barbashi, haɓakar haɓakawa, da dai sauransu, waɗanda ke buƙatar kimantawa sosai kuma la'akari da duk ayyukan.Abu na biyu, rufin phosphor ya kamata ya zama iri ɗaya, zai fi dacewa kauri na manne da ke kan kowane wuri mai haske na guntu mai fitar da haske ya zama iri ɗaya, don kada ya hana hasken gida fita saboda rashin daidaiton kauri, amma. kuma inganta ingancin wurin haske.

bayyani:

Kyakkyawan ƙirar ƙetare zafi yana taka muhimmiyar rawa wajen haɓaka ingantaccen hasken wutar lantarki na samfuran LED, kuma shine madaidaicin don tabbatar da rayuwar sabis da amincin samfuran.Tashar tashar hasken wutar lantarki da aka tsara da kyau anan tana mai da hankali kan ƙirar tsari, zaɓin kayan aiki da aiwatar da jiyya na rami da mannewa, wanda zai iya inganta ingantaccen haɓaka hasken wutar lantarki.Domin ikofarin LED, zaɓin phosphor da ƙirar tsari kuma suna da mahimmanci don haɓaka tabo da ingantaccen haske.