LED

Taw qhia

Lub teeb-emitting diode (LED) yog ob-lead semiconductor lub teeb. Xyoo 1962, General Electric's Nick Helenak tau tsim thawj lub teeb pom kev zoo-emitting diode.

Lub LED muaj ib nti ntawm cov khoom siv semiconducting doped nrog impurities los tsim ib qho kev sib tshuam pn. Raws li nyob rau hauv lwm yam diodes, tam sim no ntws yooj yim los ntawm p-sab, los yog anode, mus rau n-sab, los yog cathode, tab sis tsis nyob rau hauv lub rov qab kev taw qhia.

LED txoj kev loj hlob pib nrog infrared thiab liab li ua nrog gallium arsenide. Kev nce qib hauv cov ntaub ntawv tshawb fawb tau ua rau ua cov khoom siv nrog qhov luv luv wavelengths, emitting lub teeb nyob rau hauv ntau yam xim..

LED teeb nyob rau hauv lub Mainstream

Raws li peb saib ntawm kev ua lag luam, Halogen teeb (HID) yog nrov raws li lub tsev hais plaub sab nraum zoov lub teeb pom kev zoo rau lub sijhawm. Halogen teeb yog dav siv nyob rau hauv loj sab nraum zoov billboards, chaw nres tsheb, terminals, industrial thiab mining lag luam, thiab lwm yam., thiab tau nkag mus rau hauv lub tsev hais plaub sab nraum zoov basketball teeb pom kev zoo, ib tug standard sab nraum zoov basketball tsev hais plaub (32x19 meters), nrog rau qhov zoo ntawm lub siab brightness, zoo luminous efficiency thiab yooj yim txij nkawm. Nrog 4-6 halogen teeb ntawm txog 400W, nws tuaj yeem ua tau raws li qhov xav tau ntawm lub teeb pom kev zoo hauv pob tawb. Halogen teeb kuj muaj qhov zoo ntawm qhov ntev, muaj zog nkag mus rau lub zog thiab teeb pom kev zoo, yog li kev siv cov teeb me me ntawm qhov deb ntawm sab ntawm chav kawm kuj tuaj yeem ua tiav cov teeb pom kev zoo ntawm lub tsev hais plaub ntaus pob. Qhov tsis zoo ntawm cov teeb halogen yog lub zog loj, qhov sib piv ntawm lub zog siv tsis siab, thiab lub teeb siv lub teeb yog siab dhau. Kev raug lub teeb ntev ntev yuav cuam tshuam rau tus neeg ncaws pob qhov kev txiav txim siab pom.

Raws li cov kev xaiv tseem ceeb ntawm cov teeb pom kev zoo sab nraum zoov, LED dej nyab teeb pom kev zoo rau sab nraum zoov teeb pom kev zoo vim tias nws tsis muaj zog siv, me me, lub teeb yuag thiab siab luminous efficiency. Kev siv dav dav ntawm LED teeb pom kev zoo nyob rau hauv thaj chaw ntawm cov teeb pom kev sab nraum zoov basketball tau tshwm sim tsis ntev los no. Hauv kev teeb pom kev sab nraum zoov, LEDs tuaj yeem txuag tau 50% mus rau 90% ntawm lub zog piv rau cov roj teeb hluav taws xob siab (HID). Tus nqi pib yuav ua rau qee tus tswv xav txog qhov kev hloov pauv tsis txaus ntseeg, tab sis LED lub zog txuag hluav taws xob yog qhov tseem ceeb, thiab kev rov ua dua tshiab tuaj yeem ua tiav hauv ib mus rau peb xyoos. Lwm txoj hauv kev txuag nqi rau LED yog txo qhov xav tau kev saib xyuas.

Thaum hloov lub teeb hlau halide, nws feem ntau tsawg dua 50% ntawm lub teeb pom kev qub. Qhov no txhais tau hais tias lawv muab ib theem ntawm illumination uas qis dua lawv cov qauv tsim thiab feem ntau ua rau muaj kev tsom xam. Nyob rau hauv sib piv, niaj hnub LEDs muaj ib tug lumen txij nkawm tus nqi ntawm ntau tshaj 95% tom qab 60,000 teev, txaus los tswj cov teeb pom kev zoo hmo ntuj ntawm ntau tshaj 14 xyoo.