Keeb kwm ntawm LED: Los ntawm Discovery mus rau kiv puag ncig

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 LED lub teeb qhov chaw ua los ntawm semiconductor PN junction lub teeb emission txoj cai tau qhia nyob rau hauv 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.

Nyob rau hauv nruab nrab-1970s, cov ntsiab lus nyob rau hauv thiab N tau qhia kom LED tsim teeb ntsuab (λ P = 555nm), lub teeb daj (λ P = 590nm) thiab txiv kab ntxwv lub teeb (λ P = 610nm).

Thaum ntxov xyoo 1980, GaAlAs LED teeb qhov chaw tshwm sim, ua rau lub teeb pom kev zoo ntawm LED liab ncav cuag 10 lumens / watt.

Nyob rau hauv thaum ntxov 1990s, ob yam khoom tshiab, GaAlInP emitting liab thiab daj lub teeb 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 fluorescent teeb tawm;

- 1959 Halogen teeb tawm;

- 1961 High-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 ib qho 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% hauv ib xyoos, thiab cov khoom me me nrog lub teeb attenuation tsawg dua 3% hauv ib xyoos.

LED pas dej ua ke teeb, LED underwater teeb, LED ciav teeb, thiab LED sab nraum zoov toj roob hauv pes teeb yuav ua tau loj-tsim. 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.