Lub teeb efficiency ntawm LED teeb yog dab tsi?

Luminous efficiency (luminous efficiency), lub luminous flux tawm los ntawm lub teeb qhov chaw faib los ntawm lub hwj chim noj los ntawm lub teeb qhov chaw. Nws yog qhov taw qhia tseem ceeb los ntsuas lub zog txuag ntawm lub teeb ci.

Luminous efficiency yog qhov parameter ntawm lub teeb ci, uas yog qhov piv ntawm luminous flux rau lub zog. Nyob ntawm qhov xwm txheej, lub hwj chim no tuaj yeem xa mus rau cov hluav taws xob hluav taws xob tawm los ntawm lub teeb ci, lossis lub zog uas muab lub teeb ci (tuaj yeem yog hluav taws xob, hluav taws xob, thiab lwm yam). Lub zog nyob rau hauv luminous efficiency feem ntau yog nyob ntawm cov ntsiab lus, tab sis nyob rau hauv ntau zaus nws tsis paub.

Vim hais tias ntawm cov qauv ntawm tib neeg lub qhov muag, tsis yog tag nrho cov wavelengths ntawm lub teeb muaj tib visibility. Lub spectrum ntawm infrared thiab ultraviolet lub teeb tsis cuam tshuam rau lub luminous efficiency. Lub luminous efficiency ntawm lub teeb ci muaj feem xyuam nrog lub peev xwm ntawm lub teeb ci los hloov lub zog rau hauv hluav taws xob hluav taws xob thiab lub peev xwm ntawm tib neeg lub qhov muag kom pom cov hluav taws xob emitted.

Cov ntaub ntawv txuas ntxiv

luminous flux yog hais txog lub zog hluav taws xob uas tuaj yeem hnov ​​​​los ntawm tib neeg lub qhov muag, uas yog sib npaug ntawm cov khoom hluav taws xob hluav taws xob ntawm qee qhov band thiab qhov txheeb ze pom tau ntawm qhov band hauv ib lub sijhawm. Vim hais tias tus txheeb ze pom kev ntawm tib neeg lub qhov muag rau txawv wavelengths ntawm lub teeb yog txawv, yog li lub zog hluav taws xob ntawm txawv wavelengths ntawm lub teeb yog sib npaug, nws luminous flux tsis sib npaug.

Luminous flux yog hais txog tus nqi ntawm cov radiant flux soj ntsuam raws li tus txheej txheem thoob ntiaj teb tib neeg pom cov yam ntxwv, qhia los ntawm lub cim Φ (los yog Φr). Chav tsev ntawm luminous flux yog lm (lumen). 1lm yog sib npaug rau lub luminous flux emitted los ntawm ib qhov chaw point nrog ib tug uniform luminous siv ntawm 1cd (Candela) nyob rau hauv ib tug khoom lub kaum sab xis ntawm 1sr (sphericity) unit, uas yog, 1lm =1 cd·sr.

Lub nominal luminous flux ntawm 40W zoo tib yam incandescent teeb yog 360lm, lub nominal luminous flux ntawm 40W nruab hnub nrig fluorescent teeb yog 2100 lm, thiab luminous flux ntawm 400W txheem high-pressure sodium teeb tuaj yeem ncav cuag 48000 lm.

Luminous efficiency Brightness:

Luminance yog hais txog lub cev kom muaj nuj nqis ntawm luminance (reflection) ntawm qhov chaw ntawm lub cev luminous (reflector). Tib neeg lub qhov muag pom lub teeb ci los ntawm ib qho kev taw qhia, thiab qhov sib piv ntawm lub teeb siv hauv qhov kev taw qhia no mus rau thaj chaw teeb pom kev "pom" los ntawm tib neeg lub qhov muag txhais tau tias yog qhov ci ntsa iab ntawm lub teeb ci, uas yog, kev siv lub teeb ci. nyob rau ntawm qhov project projected cheeb tsam. Brightness yog sawv cev los ntawm lub cim L, thiab chav tsev ntawm qhov ci yog Candela ib square meter (cd / m2).

Qhov ci ntsa iab ntawm lub teeb ci muaj feem cuam tshuam rau thaj tsam ntawm lub luminous lub cev, nyob rau hauv cov ntaub ntawv ntawm tib lub teeb siv, lub luminous cheeb tsam yog loj, thiab qhov opposite yog ci.

Lub ci ci kuj muaj feem xyuam rau cov kev taw qhia ntawm lub luminous nto, thiab qhov ci ci ntawm tib lub luminous nto kuj txawv nyob rau hauv ntau cov lus qhia, feem ntau yog ntsuas nyob rau hauv cov kev taw qhia perpendicular mus rau txoj kab uas pom.

Piv txwv li, nyob rau hauv cov teeb pom kev zoo, yog tias koj xav txo qhov ci ntawm qhov kev kawm, tshwj xeeb tshaj yog lub ntsej muag ntawm tus cwj pwm, qhov kev coj ua ib txwm yog rub qhov deb ntawm lub teeb kom deb, lossis ntxiv cov ntawv muag muag rau pem hauv ntej ntawm lub teeb kom txo tau cov teeb pom kev zoo. kev siv lub teeb.