Ib qho khoom siv LED yog ib qho yeeb yaj duab uas ua los ntawm lub teeb-emitting diodes, los yog LEDs. LEDs yog cov hluav taws xob me me uas tsim lub teeb ci heev. Lawv siv dav rau txhua hnub siv los ntawm tsheb khiav mus rau tej thaj chaw deb. Muaj ntau cov ntawv qhia LED yog siv sab nraum zoov hauv cov ntawv qhia kev lag luam thiab cov phiajcim.
Ib cov yeeb yam LED raug tsim los ntawm ntau lub koob ci ntsa iab, uas qee zaus siv los ua ib qho kev teeb pom kev zoo lossis qhov tsis pom kev es tsis yog rau cov khoom. Ob chav kawm ntawm LED panels muaj nyob: pa LED panels, uas siv discrete LEDs, thiab dais mounted cuab yeej (SMD) panels. Cov chaw panels yog qhov ntau ntawm ob, tshwj xeeb tshaj yog rau cov ntxaij vab tshaus loj sab nrauv. Nyob rau hauv hom LED vaj huam sib luag, tej pawg ntawm cov liab, ntsuab, thiab xiav LEDs tau muab sib dhos ua ke los ua ntau daim duab zoo nkaus li square pixels.
SMD technology feem ntau yog siv los tsim ib qho qauv LED uas siv rau hauv tsev. Cov ntxaij vab tshaus uas siv SMD kuj siv cov xim liab ntsuab, ntsuab, thiab xiav rau lub teeb pom kev zoo xws li LED cov voj voog, uas yog lawv tus kheej siv qee qhov teeb pom kev zoo los yog kev siv teeb pom kev zoo rau cov khoom tsis zoo. nyob rau hauv computer chips los yog me me Circuit Court boards. Cov pixels yog txhua feeb heev, nrog ib tug neeg uas muaj lub ntsej muag uas muaj me dua tus pinhead. Lub ntsiab tswv yim sib txawv ntawm ob yog qhov tsawg tshaj plaws saib kev nrug nrog SMD, as Well as qis dua me ntsis. Cov ob leeg no ua SMD cov technology zoo dua rau kev siv sab hauv tsev.
Cov neeg diodes uas ua tau ib qho zaub ua kom pom ntawm lub ntsej muag yog lawv tus kheej kev tsim ua ntej uas muaj ntau txoj kev zoo dua lwm qhov chaw teeb pom kev zoo. Ib qho LED yog ua los ntawm cov ntaub ntawv yas tshuav ntawm ib lub semiconductor nti, uas muaj qhov zoo thiab tsis zoo terminals rau nws. Cov khoom hluav taws xob ntws mus rau hauv lub semiconductor nti, uas - vim yog nws cov khoom siv tshuaj - ua rau cov electrons muab tawm lub zog hauv daim ntawv ntawm photons. Peb ces perceive cov photons li lub teeb. Txuj sib txawv semiconductors yuav muab tawm xim sib txawv ntawm lub teeb, nrog rau cov teeb ci ntsa iab thiab lub ultraviolet.
Ib qho LED muaj ntau yam zoo dua li lub teeb pom kev zoo, qhov raug teeb ci hauv ntau lub tsev. Ua ntej, muaj tsawg heev kub tsim los ntawm ib qho LED , as opposed to loj npaum li cas ntawm lub tshav kub uas ua los ntawm lub teeb ntsev tungsten. Nyob rau hauv ib lub teeb nyeg, ze li ntawm ib nrab lub zog poob thaum cua sov. LED teeb kuj siv zog tsawg zog los khiav. Qhov no ua rau lawv lub teeb pom kev zoo rau cov cuab yeej xws li cov teeb tsheb khiav tsheb, uas khiav lag luam tsis tu ncua.
Tus thawj LED cov ntxaij vab tshaus tau tsim nyob rau xyoo 1970s, thiab lawv cov neeg muag khoom tau txais txiaj ntsim thiab lees paub ntawm 29th Engineering Exposition hauv Anaheim, California. Lub sij hawm ntawd, txawm li cas los xij, qhov tsuas LED cov khoom muaj monochromatic, txij li thaum muaj cov xim xiav uas tau tsim tsis tau tsim. Cov hauj lwm xiav cov xaim uas tsim nyog yuav tsum tau xim rau cov xim, thiab thaum kawg no tau tshwm sim rau xyoo 1990.