Keeb kwm
Xyoo 1960, cov kws tshawb fawb tau tsim LED raws li lub hauv paus ntsiab lus ntawm semiconductor PN junction. Lub LED tsim nyob rau lub sijhawm ntawd yog ua los ntawm GaASP thiab nws cov xim luminous yog xim liab. Tom qab ze li ntawm 30 xyoo ntawm txoj kev loj hlob, peb paub zoo txog LED, uas muaj peev xwm emit liab, txiv kab ntxwv, daj, ntsuab, xiav thiab lwm yam xim. Txawm li cas los xij, cov LED dawb rau teeb pom kev zoo tsuas yog tsim tom qab xyoo 2000. Ntawm no peb qhia cov dawb LED rau teeb pom kev zoo.
Kev loj hlob
Thawj lub teeb ci LED ua los ntawm semiconductor PN junction lub teeb emission txoj cai tau qhia nyob rau thaum ntxov 1960s. Cov khoom siv nyob rau lub sijhawm ntawd yog GaAsP, emitting lub teeb liab (λ P=650nm), thaum lub zog tsav tam sim no yog 20mA, lub luminous flux tsuas yog ob peb txhiab ntawm lumen, thiab qhov sib thooj optical efficiency yog li 0.1 lumen. /watt.
Hauv nruab nrab -1970s, cov ntsiab lus hauv thiab N tau qhia ua kom LED tsim lub teeb ntsuab (λ P=555}nm), lub teeb daj (λ P=590}nm) thiab lub teeb txiv kab ntxwv ( λ P=610nm).
Thaum ntxov xyoo 1980s, GaAlAs LED teeb qhov chaw tshwm sim, ua rau lub luminous efficiency ntawm liab LED ncav cuag 10 lumens / watt.
Thaum xyoo 1990, ob yam khoom tshiab, GaAlInP emitting lub teeb liab thiab daj thiab GaInN emitting ntsuab thiab xiav lub teeb, tau ntse tsim, uas zoo heev txhim kho lub luminous efficiency ntawm LED.
Xyoo 2000, LED ua los ntawm yav dhau los yog nyob rau hauv thaj chaw liab thiab txiv kab ntxwv (λ P=615nm), thiab LED ua tom kawg yog nyob rau hauv cheeb tsam ntsuab (λ P=530nm).
Teeb pom kev zoo Chronicle
- 1879 Edison tau tsim lub teeb hluav taws xob;
- 1938 Lub teeb fluorescent tuaj;
- 1959 Halogen teeb tawm;
- 1961 Siab siab sodium teeb tawm los;
- 1962 Hlau halide teeb;
- 1969, thawj LED teeb (liab);
- 1976 ntsuab LED teeb;
- 1993 xiav LED teeb;
- 1999 dawb LED teeb;
- 2000 LED yuav tsum tau siv rau sab hauv tsev teeb pom kev zoo.
- Txoj kev loj hlob ntawm LED yog qhov thib ob kiv puag ncig tom qab 120 xyoo keeb kwm ntawm cov teeb pom kev zoo.
- Thaum pib ntawm lub xyoo pua 21st, LED, uas yog tsim los ntawm kev sib ntsib zoo ntawm cov xwm txheej, tib neeg thiab kev tshawb fawb, yuav dhau los ua kev tsim kho tshiab hauv lub ntiaj teb lub teeb thiab qhov tsis tseem ceeb ntsuab thev naus laus zis hloov pauv rau noob neej.
- LED yuav yog lub teeb hloov pauv zoo txij li Edison tau tsim lub teeb pom kev zoo.
LED teeb yog tsuas yog high-power dawb LED ib lub teeb. Sab saum toj peb LED teeb manufacturers nyob rau hauv lub ntiaj teb no muaj peb lub xyoos warranty. Cov khoom loj yog ntau dua lossis sib npaug li 100 lumens ib watt, thiab cov khoom me me yog ntau dua lossis sib npaug li 110 lumens ib watt. Cov khoom loj nrog lub teeb attenuation tsawg dua 3 feem pua ntawm ib xyoos, thiab cov khoom me me nrog lub teeb attenuation tsawg dua 3 feem pua ntawm ib xyoos.
LED hnub ci txoj kev teeb, LED projection teeb, LED qab nthab teeb thiab LED fluorescent teeb yuav ua tau loj. Piv txwv li, 10 watt LED fluorescent teeb tuaj yeem hloov tau 40 watt zoo tib yam fluorescent teeb lossis lub teeb txuag hluav taws xob.