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Qhov kev thov ntxov tshaj plaws ntawm cov teeb ci LED ua los ntawm lub hauv paus ntsiab lus ntawm semiconductor PN hlov teeb tau raug tsim muaj thaum xyoo 1960. Cov khoom siv thaum lub sijhawm ntawd yog GaAsP, uas tau tso tawm lub teeb liab (=p = 650 nm). Thaum tsav lub zog tam sim no yog 20 mA, lub teeb luminous tsuas yog ob peb txhiab ntawm ib lub lumen, thiab qhov sib txuam luminous efficiency yog txog 0.1 lm / W.
Hauv nruab nrab xyoo 1970, cov ntsiab lus hauv thiab N tau qhia los tsim lub teeb ntsuab (=p = 555 nm), lub teeb daj (λp = 590 nm) thiab lub teeb txiv kab ntxwv (=p = 610 nm), thiab lub zog luminous kuj tau nce rau 1 lm / W.
Thaum xyoo 1980s, cov teeb ci LED ntawm GaAlAs tau tshwm sim, ua rau lub teeb liab LED lub zog ci tau txog 10 lumens ib watt.
Hauv lub sijhawm xyoo 1990, kev txhim kho ob yam khoom tshiab, GaAlInP, uas tso tawm lub teeb liab thiab daj lub teeb, thiab GaInN, uas tso tawm lub teeb ntsuab thiab xiav, tau zoo heev txhim kho lub teeb txuag ntawm LEDs. Nyob rau xyoo 2000, yav dhau los ua rau LEDs nyob rau thaj chaw liab thiab txiv kab ntxwv (=p = 615 nm) nrog kev ua kom zoo dua 100 lumens rau ib lub sijhawm, thaum tom kawg ua rau LEDs nrog lub zog ntawm 50 lumens hauv thaj av ntsuab (λp = 530 nm )). watt.
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