umgaqo omhlophe wokukhanyisa we-LED
Ii-LED ezimhlophe yindlela yodwa yokufezekisa ukukhanya kwe-semiconductor. I-LED emhlophe ayikho ukukhanya kwe-monochromatic, kwaye akukho kukhanya okumhlophe kwi-spectrum yokukhanya okubonakalayo. Ngokutsho kophando lwabantu ngokukhanya okubonakalayo, ukukhanya okumhlophe okunokubonwa ngamehlo abantu kunokuveliswa ngokuxuba iindidi ezimbini okanye ezingaphezulu zokukhanya. Kukho iindlela ezintathu ngoku zokufumana imithombo yokukhanya kwe-LED emhlophe.
(1)I-LED eluhlaza okwesibhakabhaka + iphosphors yemibala eyahlukeneyo:
I-LED emhlophe ephuhlisiwe yiphosphor etyheli egqunywe zii-LED eziluhlaza. Ukukhanya okutyheli okwenziwa yiphosphor kuchulumancile kwaye ukukhanya okuluhlaza okwesibhakabhaka kwaqala kwachulumancisa. Ukuncediswa kunye nokuvelisa ukukhanya okumhlophe. Kuyenzeka ukuba ufumane ukukhanya okumhlophe ngokudibanisa ukukhanya okuluhlaza kunye nokukhanya okubomvu okukhutshwa yi-chip ye-LED eluhlaza okwesibhakabhaka kunye ne-phosphor, kunye nepropathi enikezela ngombala ilungile, kodwa ukusebenza kakuhle kokuguqulwa kwe-phosphor esetyenziswe kule ndlela kuphantsi, ngakumbi ubomvu. iphosphor.
Okwangoku, itekhnoloji yokupakisha emhlophe ye-LED esebenzisa i-LED eluhlaza okwesibhakabhaka enephosphor emthubi ikhulile, kodwa ingxaki yokufana, ubushushu bombala ophakamileyo kunye nesalathiso sombala ongemhle asinakusonjululwa.
(2)I-Ultraviolet okanye i-violet LED+RGB phosphor:
Umgaqo wokudibanisa ukukhanya okumhlophe kunye ne-ultraviolet okanye i-violet (300-400nm) i-LED kunye ne-RGB phosphor iyafana nesibane se-fluorescent, kodwa iphezulu kukusebenza kwesibane se-fluorescent, ukuguqulwa kwe-LED emfusa I-coefficient inokufikelela kwi-0.8, kunye nokuguqulwa kokuguqulwa kwe-quantum nganye nganye umbala wephosphor unokufikelela kwi-0.9.
Indlela yokusebenzisa i-violet LED ukonwabisa iiphosphors ezintathu eziphambili okanye ezininzi ukuvelisa ukukhanya kwe-multicolor kwaye emva koko kuxutywe kwisibane esimhlophe kunonikezelo olungcono lombala, kodwa kukwakho iingxaki. Iphosphor ebomvu kunye nephosphor eluhlaza ubukhulu becala ziisulfides, kwaye ukuzinza kokukhutshwa kokukhanya kubi. Ukubola kokukhanya kukhulu.
(3)Ii-RGB ezintathu zemibala ephambili ye-LED zenza ukukhanya okumhlophe:
Le ndlela idibanisa iintlobo ezintathu ze-chips ze-LED eziluhlaza, obomvu kunye noluhlaza okwesibhakabhaka, kwaye ngaxeshanye inika amandla, kwaye emva koko ixube ukukhanya okuluhlaza okukhutshiweyo, ukukhanya okubomvu kunye nokukhanya okuluhlaza kukukhanya okumhlophe ngokomlinganiselo othile. Umlinganiselo wohlaza, obomvu, nobhlowu udla ngokuba yi-6:3:1. Indlela yokupakisha ngokuthe ngqo i-RG.B yemibala emithathu ephambili ye-LEDs kwii-LED ezimhlophe ineyona ntsebenzo igqwesileyo yokukhanya okumhlophe, kunye nokusebenza kakuhle kwelumen yokukhanya okumhlophe kuphezulu phantsi kwesiseko sesalathiso sombala ophezulu.
Ngenxa yobushushu bombala owahlukileyo kunye nesalathiso sonikezelo sombala esifunekayo ukuze kudityaniswe ukukhanya okumhlophe, iimfuno zokusebenza kwelumen kwii-LED zokukhanya okumhlophe okuhlanganisiweyo nazo zahlukile. Nangona kunjalo, ingxaki enkulu yezobuchwepheshe yale ndlela kukuphucula ukuguqulwa kwe-electro-optical ye-LED eluhlaza kunye nokunciphisa iindleko.