Mana LED Kupenya Kuverengera Maitiro
Kutanga, kupenya kunopenya
Luminous flux inoreva kuwanda kwechiedza chinoburitswa nechiedza pachikamu chenguva, kureva, chikamu chesimba rinopenya iro simba rinopenya rinogona kuoneswa neziso remunhu. Iyo yakaenzana nechigadzirwa chesimba rinopenya reimwe bhendi pane imwe nguva yeyuniti uye kuoneka kunoenderana kweiyo bhendi. Sezvo maonerwo akaenzana emasaisai emwenje echiedza neziso remunhu akasiyana, mwenje unopenya hauna kuenzana kana masimba emwaranzi yechiedza akasiyana akaenzana. Chiratidzo chechiedza chinopenya ndi Φ, iyo unit ndeye lumens (Lm)
Zvinoenderana neiyo spectral inopenya inoyerera Φ(λ), iyo inopenya flux formula inogona kutorwa:
Φ=Km■Φ(λ)gV(λ)dλ
Muchimiro, V(λ) -chirevo che spectral luminous performance; Km - kukosha kwepamusoro kwe spectral optical performance yemwaranzi, mumayuniti eLm/W. Iko kukosha kweKm kwakatemwa neInternational Metrology Commission mu1977 kuve 683 Lm/W (λm = 555 nm).
Chechipiri, kusimba kwechiedza
Kusimba kwechiedza (light intensity) zvinoreva simba rechiedza rinopfuura nepakati penzvimbo yeyuniti panguva yeyuniti. Simba racho rinoenzana nekuwanda, inova uwandu hwekusimba kwavo (kureva, kubatanidzwa). Zvinogona zvakare kunzwisiswa kuti kupenya kwechiedza I kwechiedza chinobva munzira yakapihwa ndiko kune mwenje sosi. Iyo quotient yeinopenya flux dΦ inofambiswa mune yakasimba angle element mune ino nzira yakakamurwa neiyo yakasimba angle element dΩ.
Iyo unit yekupenya kwesimba ndeye candela (cd), 1 cd = 1 Lm / 1 sr. Huwandu hwechiedza kumativi ese enzvimbo ndiyo inopenya inoyerera.
Chechitatu, kupenya
Muchiitiko chekuyedza kupenya kwemachipi e LED uye kuongorora kuchengetedzwa kwemwaranzi yemwenje ye LED, nzira dzekufungidzira dzinowanzo shandiswa, uye microchip imaging inogona kushandiswa kuongorora chip. Kupenya ndiko kupenya L pane imwe nzvimbo pane chiedza-chinobudisa pamusoro pechiedza chechiedza, icho chiri quotient yechiedza-emitting intensity yechiso chechiso dS mune imwe nzira yakapiwa yakakamurwa ne orthographic area ye face element mu. ndege perpendicular kune yakapihwa gwara.
Iyo unit yekupenya ndeye candela pa square mita (cd/m2). Kana iyo mwenje inoburitsa nzvimbo iri perpendicular kunzira yekuyeresa, ipapo cos θ = 1.
Chechina, kujekesa
Ruvheneko ndiyo dhigirii yekuvhenekerwa kwechinhu, inoratidzwa maererano neinopenya flux inogamuchirwa pachikamu chechikamu. Kupenya kwacho kune hukama nenzvimbo yenzvimbo yekuvhenekesa, nzvimbo yakavhenekerwa nenzvimbo yemwenje iri muchadenga, uye saizi yacho inoenzanirana nekusimba kwechiedza chechiedza uye nekona yechiitiko chechiedza, uye zvakapesana nepakati chinhambwe kubva pachitubu chechiedza kusvika pamusoro pechinhu chakavhenekerwa. Kuvhenekera kweE pane imwe nzvimbo pamusoro ndiyo quotient yeruminous flux dΦ chiitiko pane panhizha kusanganisira poindi yakakamurwa nenzvimbo yepaneru dS.
Iyo unit ndeye lux (LX), 1LX = 1Lm/m2.