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LED

LED

Nov 15, 2017


LED taw qhia

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Lub teeb emitting diode. Nws yog ib lub teeb emitting semiconductor hluav taws xob. Qhov sib txig ntawm hluav taws xob no tshwm sim thaum ntxov 1962, thiab nws tsuas muaj peev xwm tawm sab luminosity liab lub teeb nyob rau hauv thaum ntxov theem, thiab ces tsim lwm monochromatic lub teeb versions. Lub teeb uas tau raug tso tawm tuaj yeem raug pom thoob plaws hauv qhov kev pom, lub paj hlwb thiab cov ultraviolet rays, thiab qhov luminosity kuj nce mus rau ib qho kev kawm ntau heev. Kev siv lub teeb los ntawm pib raws li qhov qhia tau, cov qauv khoom siv, thiab lwm yam, nrog cov kev kawm tas mus li ntawm kev siv tshuab, lub teeb tawm ntawm lub teeb pom kev zoo tuaj yeem siv rau hauv kev soj ntsuam, TV teeb pom kev zoo thiab kev kho kom zoo nkauj.

Cov cuab yeej hluav taws xob zoo tshaj plaws yog qhov nws muaj kev sib txuas lus, hu ua positive bias), thaum lub sij hawm tam sim no ntws, electrons thiab qhov hauv qhov sib xyaw thiab lub teeb sib txuas, qhov no yog hu ua electroluminescence, thiab lub teeb ntawm lub teeb, xim thiab hom siv cov khoom siv semiconductor siv thiab kev koom tes ntawm cov khoom tsis haum.

Thaum ntxov LED siv los siv cov khoom siv hluav taws xob los yog cov keyboards, vim tias nws lub siab zoo, lub neej ntev, tsis yooj yim rau kev tawg, kev kub ceev, kev ntseeg siab thiab lwm cov teeb pom kev zoo, zoo dua thiab ntau dua ntom ntom nti, toj roob hauv pes, teeb pom kev zoo. LED teeb pom kev zoo yog ib qho nrov heev tsis ntev los no.


LED siv

Tus qauv ntawm LED yog ib qho khoom siv ntawm cov khoom siv electroluminescent, muab tso rau ntawm ib lub txee hau, thiab tom qab ntawd los ntawm epoxy rechaling, los tiv thaiv cov tub ntxhais txoj hlua, yog li cov teeb meem ntawm cov seismic hauv lub cev zoo.

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Cov ntaub ntawv siv yog:

1 Chip: Cov ntaub ntawv semiconductor rau lub teeb emitting diode

2 txhuas kab ua haujlwm: Sab ceev chips thiab cua sov tuaj

3 kub xaim: Coj (ib qho kawg ntawm anode, ib qho kawg ntawm cov cathode)

4 Tom qab muab tshuaj: Tom qab ci, lub nti yog tsau rau ntawm lub bracket

5 silicon / resin: Tom qab ci, tiv thaiv lub chip puab, lub luag hauj lwm ntawm cov xov kub

6 phosphor: Qhov tseem ceeb rau lub teeb dawb LED. Kev siv ntawm LED teeb nti teeb emitting xiav lub teeb, cov xim sib tov ntawm peb lub ntsiab xim, ntxiv ib qho kev faib ua feem ntawm daj los yog liab, dawb lub teeb thiaj li tau.


Luminescence txujci

Qhov tseem ceeb ntawm lub teeb tawm ntawm lub teeb emitting diode yog ib lub wafer ntawm P tus cim thiab N hom ntawv nrab lub semiconductor. Nws muaj ib qho kev hloov ntawm P hom khoom nruab nrab thiab N hom ntawv nrab lub semiconductor, hu ua PN hlav. Hauv qee cov PN cov haujlwm ntawm cov ntaub ntawv semiconductor, thaum cov haiv neeg tsawg muaj feem nrog cov neeg feem coob, cov hluav taws xob ntau raug tso tawm rau hauv daim ntawv ntawm lub teeb, kom lub zog hluav taws xob ncaj qha mus hloov mus rau lub teeb zog. PN hlws ris thiab rov qab tshuav, tsawg dua cov cab kuj hnyav, yog li nws tsis ua lub teeb. Lub diode, uas yog ua los ntawm kev siv cov qauv ntawm electroluminescent, hu ua lub teeb emitting diode, uas feem ntau hu ua LED. Thaum nws yog nyob rau hauv txoj haujlwm ua haujlwm rau pem hauv ntej (piv txwv li, ob sab ntxiv rau pem hauv ntej), qhov tam sim no ntws los ntawm LED anode mus rau lub cathode, thiab cov khoom siv hluav taws xob semiconductor xa tawm cov xim sib txawv ntawm ultraviolet rau sab qaum teb, thiab qhov siv ntawm lub teeb ntsig txog qhov tam sim no.