Indlela Yokulinganisa Yokukhanya kwe-LED
Njengemithombo yokukhanya evamile, amayunithi okulinganisa okukhanya emithombo yokukhanya ye-LED ayafana. Ukuze wenze abafundi baqonde futhi basebenzise kalula, ulwazi olufanele luzokwethulwa kafushane ngezansi:
1. Ukuguquguquka okukhanyayo
I-flux ekhanyayo ibhekisela enanini lokukhanya elikhishwa umthombo wokukhanya ngesikhathi seyunithi ngayinye, okungukuthi, ingxenye yamandla akhazimulayo amandla akhazimulayo angazwakala ngeso lomuntu. Ilingana nomkhiqizo wamandla akhazimulayo ebhendi ethile ngesikhathi seyunithi kanye nezinga lokubuka elihlobene laleli bhendi. Njengoba amehlo omuntu enamazinga ahlukene okubuka okuhlobene okukhanya kwamaza ahlukene, lapho amandla okukhanya okukhanya kwamaza ahlukene elingana, ukugeleza okukhanyayo akulingani. Uphawu lwe-flux ekhanyayo ngu-Φ, kanti iyunithi i-lumens (Lm).
Ngokuvumelana ne-spectral radiant flux Φ (λ), ifomula ye-flux ekhanyayo ingatholakala:
Φ=Km■Φ(λ)gV(λ)dλ
Kufomula, i-V(λ)—ukusebenza kahle kokukhanya kwe-spectral; Km—inani eliphezulu lokukhanya okukhanyayo okunemisebe, ku-Lm/W. Ngo-1977, inani le-Km lanqunywa iKomidi Lamazwe Ngamazwe Lesisindo Nezilinganiso ukuthi libe ngu-683Lm/W (λm=555nm).
2. Amandla okukhanya
Amandla okukhanya asho amandla okukhanya adlula endaweni yeyunithi ngesikhathi seyunithi. Amandla alingana nemvamisa futhi iyisamba sokuqina kwawo (okungukuthi okubalulekile). Kungase futhi kuqondwe njengokushuba okukhanyayo I komthombo wokukhanya endaweni ethile kuwumthombo wokukhanya I-quotient ye-luminous flux d Φ edluliswa engxenyeni yekhona le-cube ohlangothini oluhlukaniswe ingxenye yekhona le-cube d Ω
Iyunithi yokuqina okukhanyayo yi-candela (cd), 1cd=1Lm/1sr. Isamba samandla okukhanya kuzo zonke izinhlangothi emkhathini ukuguquguquka okukhanyayo.
3. Ukukhanya
Enqubweni yethu yokuhlola ukukhanya kwama-chips e-LED nokuhlola ukuphepha kwemisebe yokukhanya ye-LED, izindlela zokuthwebula zivame ukusetshenziswa, futhi ukuthwebula kwezithombe ezincane kungasetshenziswa ukukala ukuhlolwa kwe-chip. Ukukhanya okukhanyayo ukukhanya L kwendawo ethile endaweni ekhipha ukukhanya yomthombo wokukhanya, okuyi-quotient yokuqina okukhanyayo kwesici sobuso u-d S ngendlela enikeziwe ehlukaniswe ngendawo ye-elementi yobuso ekubhalweni kwe-orthographic. indiza perpendicular isiqondiso esinikeziwe
Iyunithi yokukhanya yi-candela ngemitha yesikwele (cd/m2). Uma indawo ekhipha ukukhanya incike kuhlangothi lwesilinganiso, cosθ=1.
4. Ukukhanyisa
Ukukhanyisa kusho izinga into ekhanyiswa ngalo, elivezwa ukugeleza okukhanyayo okutholwe endaweni yeyunithi ngayinye. Ukukhanya kuhlobene nomthombo wokukhanya okhanyayo, indawo ekhanyisiwe kanye nokuma komthombo wokukhanya emkhathini. Usayizi ulingana nokuqina komthombo wokukhanya kanye ne-engeli yesigameko yokukhanya, futhi ngokuphambene ngokulingana nesikwele sebanga ukusuka emthonjeni wokukhanya ukuya phezulu kwento ekhanyisiwe. Ukukhanya okungu-E kwephuzu elingaphezulu kuyi-quotient ye-luminous flux d Φ isigameko kuphaneli equkethe iphuzu elihlukaniswe ngendawo yephaneli d S.
Iyunithi ithi Lux (LX), 1LX=1Lm/m2.