Tasirin Ragewar Fitilar LED
A matsayin sabon nau'in hasken kore, fitilun LED suna adana makamashi, abokantaka da muhalli da kuma tsawon rai, kuma abokan ciniki suna mutunta su sosai. Amma matsalar rubewar LED wata matsala ce da fitulun LED ke fuskanta. Lalacewar hasken da ba ta katsewa ya yi tasiri sosai ga amfani da fitilun LED.
A yanzu, lalacewar haske na fararen LEDs a kasuwa na iya zama ɗayan batutuwan farko yayin tafiya cikin hasken farar hula. Menene ke haifar da attenuation haske na LEDs? Gabaɗaya magana, akwai manyan dalilai guda biyu don haɓaka hasken LEDs:
I. Matsalolin ingancin samfuran LED:
1. Guntuwar LED ɗin da aka karɓa ba ta cikin lafiya mai kyau, kuma haske yana raguwa da sauri.
2. Akwai lahani a cikin tsarin samarwa, kuma zafin wutar lantarki na LED ba za a iya samun shi da kyau daga fil ɗin PIN ba, wanda ya haifar da matsanancin zafin jiki na LED da kuma ƙara ƙarar guntu.
II. Sharuɗɗan amfani:
1. LED din yana tafiyar da wutar lantarki ta hanyar wutan lantarki, wasu LEDs kuma suna motsa su ta hanyar wuta don haifar da lalacewa.
2. A halin yanzu drive ne mafi girma fiye da rated yanayin drive.
A gaskiya ma, akwai dalilai da yawa don lalata samfuran LED. Batun mafi mahimmanci shine matsalar zafi. Duk da cewa masana'antun da yawa ba sa ba da kulawa ta musamman ga matsalar ɓarkewar zafi a cikin samfuran na biyu, yin amfani da dogon lokaci na waɗannan samfuran LED na biyu zai fi mai da hankali ga zubar da zafi fiye da yadda ake samu. LED kayayyakin sun fi girma. Juriya na thermal na guntuwar LED da kanta, tasirin mannen azurfa, tasirin zafi na substrate, da colloid da waya na gwal suma suna da alaƙa da attenuation haske.
III. Abubuwa uku da suka shafi ingancin fitilun LED
1. Zaɓin irin nau'in fitilu na LED
Ingancin hasken farin LED yana da matukar muhimmanci. Don ba da wasu misalai, guda crystal 14mil farin haske kashi guntu a matsayin wakilin, LED farin fitilar da aka cushe da talakawa epoxy guduro-sanya tushe, farin haske manne da kunshin manne. Hasken haske guda ɗaya a cikin yanayin digiri na 30 yana nuna bayanan attenuation don ƙimar kulawa mai haske na 70% bayan sa'o'i dubu.
Idan ana amfani da kunshin manne mai ƙarancin lalacewa na Class D, a cikin yanayin tsufa iri ɗaya, haɓakarsa mai haske a cikin sa'a dubu shine 45%.
Idan ana amfani da kunshin manne mai ƙarancin lalacewa na Class C, a cikin yanayin tsufa iri ɗaya, haɓakarsa mai haske a cikin sa'a dubu shine 12%.
Idan ana amfani da kunshin manne mai ƙarancin lalacewa na Class B, a cikin yanayin tsufa iri ɗaya, haɓakarsa mai haske a cikin sa'a dubu shine 3%.
Idan ana amfani da kunshin manne mai ƙarancin lalacewa na Class A, a cikin yanayin tsufa iri ɗaya, haɓakar hasken sa a cikin sa'a dubu shine 6%.
2. Yin la'akari da zafin aiki na kwakwalwan LEDs
Dangane da bayanan tsufa na farar fitilar LED guda ɗaya, idan farin farin LED ɗaya ne kawai ke aiki kuma yanayin yanayin yanayinsa ya kai digiri 30, to yanayin madaidaicin lokacin da farin farin LED guda ɗaya ke aiki ba zai wuce digiri 45 ba. A wannan lokacin, rayuwar wannan LED zata kasance da kyau sosai.
Idan akwai 100 LED farin fitilun aiki a lokaci guda, tazara tsakanin su ne kawai 11.4mm, sa'an nan da zafin jiki na sashi a kusa da farin LED fitilu bazai wuce 45 digiri, amma waɗannan fitilu a tsakiyar tari haske iya. kai wani babban zafin jiki na digiri 65. A wannan lokacin, zai zama gwaji mai wahala ga kwakwalwan LEDs saboda waɗannan fararen fitilun LED da aka tattara a tsakiya za su sami saurin lalacewa na haske, yayin da fitilu da ke kewaye da tari za su sami raguwar ruɓar haske.
Kamar yadda muka sani, LED yana jin tsoron zafi. Mafi girman zafin jiki, mafi guntu tsawon rayuwar LED, yayin da ƙananan zafin jiki, mafi tsayin rayuwar LED. Don haka madaidaicin zafin aiki na LEDs yakamata ya kasance tsakanin rage digiri 5 zuwa 0. Amma wannan ba zai yiwu ba a aikace.
Sabili da haka, ya kamata mu ƙarfafa aikin thermal a cikin ƙirar fitilu kamar yadda ƙananan zafin jiki, tsawon rayuwar LED.
3. Yin la'akari da sigogi na lantarki na kwakwalwan LEDs
Dangane da sakamakon gwajin, ƙananan motsin tuƙi, ƙaramin zafin da ke fitowa da ƙarancin haske. Dangane da binciken, ƙirar da'irar hasken rana ta LED, ƙarfin tuƙi na fitilun LED gabaɗaya 5-10mA ne kawai, kuma idan adadin fitilun ya wuce 500 ko fiye, halin yanzu tuƙinsa gabaɗaya 10-15mA ne. Koyaya, direban halin yanzu na aikace-aikacen LED na gabaɗaya 15-18mA ne kawai, mutane kaɗan ne ke tsara na yanzu zuwa sama da 20mA.
Sakamakon gwajin ya kuma nuna cewa a ƙarƙashin 14mA direban halin yanzu, da murfin da ba ya iya jurewa iska, zafin iska a ciki ya kai digiri 71, samfuran ƙarancin lalacewa, ƙarancin haske a cikin sa'o'i 1000, da 3% a cikin sa'o'i 2000, wanda ke nufin cewa amfani da wannan farar fitilar LED mai ƙarancin ruɓewa ya kai iyakarsa a irin wannan yanayi sannan kuma babba yana cutar da ita idan ya wuce iyakarta.
Domin farantin tsufa ba shi da aikin watsar da zafi, don haka zafin da LED ɗin ke haifarwa lokacin da yake aiki ba a yada shi zuwa waje ba, musamman ma gwaje-gwajen sun tabbatar da wannan batu. Yanayin zafin iska a cikin farantin tsufa ya kai madaidaicin digiri 101, yayin da zafin saman murfin da ke kan farantin tsufa ya kai digiri 53 kawai, wanda shine bambanci na dubun digiri. Wannan yana nuna cewa murfin filastik da aka ƙera asali ba shi da aikin sanyaya zafi. Duk da haka, a cikin ƙirar fitilu na yau da kullum, ya kamata yayi la'akari da aikin zafi da zafi da zafi.
Sabili da haka, a taƙaice, ƙirar sifofin lantarki masu aiki na kwakwalwan LED ya kamata a dogara ne akan ainihin halin da ake ciki. Idan aikin wutar lantarki na fitilar yana da kyau sosai, ba kome ba idan hasken wutar lantarki na LED ya karu kadan, saboda ana iya fitar da zafin da fitilar LED ta haifar zuwa waje, wanda ba ya lalata fitilar LED. . Akasin haka, idan aikin kwantar da wutar lantarki na fitilar ya kasance maras kyau, yana da kyau a tsara kewaye don ƙarami kuma bari a saki zafi kadan.
