LEDs nyob txhua qhov chaw. Muaj lub caij nyoog zoo koj tab tom nyeem tsab xov xwm no txog LEDs los ntawm lub teeb tawm ntawm ib lossis ntau dua LEDs. Tab sis dab tsi yog qhov LED? Hauv phau ntawv qhia no, peb qhia koj cov hauv paus.
LED txhais
LED stands rau Lub Teeb-Emitting Diode, ib qho khoom siv hluav taws xob ua los ntawm ob hom khoom siv semiconductor. Zoo ib yam li lub tswv yim rau cov khoom siv semiconductor siv hauv cov khoom siv hauv computer (xws li RAM, processors, thiab transistors), diodes yog cov khoom siv uas tso cai rau cov dej ntws ntawm hluav taws xob tshwm sim hauv ib qho kev coj.
Ib qho LED ua tib yam. Nws thaiv cov dej ntws ntawm hluav taws xob hauv ib qho kev taw qhia thaum cia nws txav mus los ntawm lwm qhov. Thaum hluav taws xob, nyob rau hauv daim ntawv ntawm electrons, mus hla kev sib tshuam ntawm ob hom semiconductor khoom, lub zog yog muab tawm nyob rau hauv daim ntawv ntawm lub teeb.
LED History
Cov credit rau thawj qhov piv txwv ntawm LED yog Oleg Losev, tus neeg tsim khoom Lavxias teb sab uas tau pom lub LED hauv xyoo 1927. Txawm li cas los xij, nws siv sijhawm li plaub xyoos ua ntej qhov kev tsim khoom tsim los siv.
LEDs thawj zaug tau tshwm sim hauv kev lag luam kev lag luam hauv xyoo 1962, thaum Texas Instruments pib muag ib qho LED uas muab lub teeb rau hauv infrared spectrum. Cov LEDs thawj zaug no tau siv feem ntau hauv cov chaw taws teeb tswj, xws li cov chaw taws teeb hauv TV thaum ntxov.
thawj lub teeb pom kev LED kuj ua rau nws pom hauv xyoo 1962, emitting ib tug me ntsis qis, tab sis pom, lub teeb liab. Lwm xyoo caum yuav dhau mus ua ntej qhov ci yuav nce ntxiv, thiab cov xim ntxiv, feem ntau daj thiab liab-txiv kab ntxwv, tau tsim muaj.
LEDs tau tawm hauv xyoo 1976 nrog kev qhia txog cov qauv ci ntsa iab thiab kev ua haujlwm siab uas tuaj yeem siv rau ntau yam kev siv, suav nrog kev sib txuas lus thiab ua cov ntsuas ntsuas. Thaum kawg, LEDs tau siv rau hauv lub tshuab xam zauv ua lej.
xiav, liab, daj, liab-txiv kab ntxwv, thiab ntsuab LED teeb xim
LEDs nyob rau xyoo 1970s thiab thaum ntxov 1980s tau txwv rau ob peb xim-liab, daj, liab-txiv kab ntxwv, thiab ntsuab yog qhov tseem ceeb tshaj plaws. Thaum nws tuaj yeem ua tau hauv chav kuaj los tsim LEDs nrog cov xim sib txawv, tus nqi ntawm cov khoom khaws cia ntxiv rau LED xim spectrum los ntawm kev ncav cuag ntau lawm.
Nws tau xav tias LED ua lub teeb nyob rau hauv xiav spectrum yuav tso cai rau LEDs siv rau hauv cov xim puv xim. Kev tshawb nrhiav tau nyob rau hauv kev lag luam siv tau xiav LED, uas tuaj yeem tsim cov xim dav dav thaum ua ke nrog cov xim liab thiab daj uas twb muaj lawm. Thawj high-brightness xiav LED ua nws debut nyob rau hauv 1994. High-power thiab high-efficiency xiav LEDs tshwm ob peb xyoos tom qab.
Lub tswv yim ntawm kev siv LEDs rau tag nrho cov spectrum zaub yeej tsis tau mus deb dhau mus txog rau thaum lub invention ntawm lub dawb LED, uas tshwm sim sai tom qab high-efficiency xiav LEDs tshwm.
Txawm tias koj tuaj yeem pom lub sijhawm LED TV lossis LED saib, feem ntau ntawm cov lus qhia no siv LCD (Liquid Crystal Display) rau cov khoom siv tiag tiag thiab siv LEDs los teeb lub LCDs. Qhov ntawd tsis yog hais qhov tseeb LED-raws li cov lus qhia tsis muaj nyob hauv cov saib thiab TVs siv OLED (Organic LED) thev naus laus zis. Cov khoom siv no zoo li pheej yig thiab nyuaj rau kev tsim khoom ntawm cov nplai loj. Txawm li cas los xij, raws li cov txheej txheem tsim khoom tseem tab tom loj hlob, LED teeb pom kev zoo.
YSiv rau LEDs
LED thev naus laus zis txuas ntxiv rau kev paub tab, thiab ntau yam kev siv rau LEDs tau pom, suav nrog:
- Cov khoom siv thiab cov khoom siv hluav taws xob siv hluav taws xob: Tshawb xyuas cov chaw taws teeb hauv TV. Muaj feem yuav muaj ib qho infrared LED ntawm kev lag luam kawg ntawm cov chaw taws teeb.
- ntsuas teeb: Ib zaug, neon thiab incandescent teeb tau nquag siv rau cov teeb pom kev lag luam thiab kev lag luam. Tam sim no LEDs, uas ua tau zoo dua, muaj lub neej ntev dua, thiab feem ntau tsis tshua kim, tau coj mus.
- Displays: Cov kev siv LEDs no suav nrog cov ntawv sau npe uas pom hauv txhua yam los ntawm lub tshuab xam zauv thaum ntxov, moos, cov paib tshaj tawm, thiab cov ntawv qhia kev thauj mus los. Nws kuj tseem yuav yog tias koj lub TV thiab lub khoos phis tawj saib siv LEDs los teeb pom kev pom.
- Teeb qhov muag: LEDs tab tom hloov lub teeb qhov muag teeb uas ua tiav los ntawm Thomas Edison. Raws li txoj kev, fluorescents hauv tsev thiab chaw lag luam kuj pom tsawg thiab siv tsawg dua.
LEDs yuav txuas ntxiv siv rau hauv ntau yam khoom, thiab kev siv tshiab tau muab dov tawm txhua lub sijhawm.
FAQ
QLED vs. LED yog dab tsi?
QLED thiab LED yog siv los siv rau TVs. Lub TV LED zoo li LCD (kua siv lead ua kua) TV, tab sis LED teeb ua haujlwm ua lub teeb rov qab tsis yog lub teeb fluorescent. QLED TV yog LED TV uas tsim cov xim ci dua thiab muaj xim ntau dua vim yog txheej quantum dot uas zaum ntawm lub teeb nraub qaum thiab LED vaj huam sib luag.
Qhov txawv ntawm OLED thiab LED yog dab tsi?
OLED sawv cev rau Organic Light-Emitting Diode. Hais txog TVs, OLED TV tsis muaj lub teeb rov qab, tab sis LED TV ua. OLED thev naus laus zis siv electroluminescence, txhais tau tias ntau lab tus me me pixels tsim lub teeb nyob ntawm seb lawv tau txais hluav taws xob ntau npaum li cas. OLED TVs ua cov xim zoo nkauj nrog qhov sib txawv ntawm qhov sib txawv.
Lub teeb xim LED twg yog qhov zoo tshaj rau kev pw tsaug zog?
Cov xim sov LED, xws li liab thiab daj, yog qhov zoo tshaj plaws rau kev pw tsaug zog vim qhov muag tsis tshua nkag siab rau cov xim no, thiab lawv "xim kub" qis dua lub hnub. Txawm li cas los xij, lub teeb xiav tuaj yeem cuam tshuam koj lub moos sab hauv thiab cuam tshuam koj cov melatonin ntau lawm, ua rau cov xim txias dua no xim tsis zoo rau ib puag ncig koj tus kheej thaum sim pw.
