Qhov sib txawv loj tshaj plaws ntawm cov kua siv lead ua kua thiab cov ntshav ntshav yog cov kua siv lead ua kua yuav tsum tso siab rau lub teeb pom kev zoo, thaum plasma TV belongs rau cov khoom siv luminescence active.Tam sim no, lub ntsiab kua siv lead ua backlighting thev naus laus zis hauv kev lag luam suav nrog LED (lub teeb-emitting diode) thiab CCFL (txias cathode fluorescent teeb).LCD LCD yog..Liquid Crystal Display yog luv rau Liquid Crystal Display.Cov qauv ntawm LCD yog cov kua siv lead ua kua tso rau ntawm ob qho tib si ntawm cov iav.Muaj ntau cov kab me me ntsug thiab kab rov tav ntawm ob daim iav.
Cov kua siv lead ua kua nws tus kheej tsis tawm lub teeb, tsuas yog tuaj yeem tsim cov xim hloov, xav tau lub teeb pom kev zoo ntawm lub teeb pom kev.Qhov txawv ntawm cov ntxaij vab tshaus laptop, uas siv cov kab mob cathode fluorescent txias (CCFL) ua lub teeb pom kev zoo, thiab LED backlit cov ntxaij vab tshaus, uas siv lub teeb-emitting diodes (leds), yog hais tias.White LED yog taw tes lub teeb qhov chaw, CCFL raj yog strip lub teeb qhov chaw.Small dawb leds yog powered los ntawm ncaj qha tam sim no (dc) fais fab, uas yuav siv tau nyob rau hauv tandem, tab sis yog hais tias koj muaj ntau tshaj li ob peb watts, koj yuav tsum xav txog qhov tsim nyog tsav Circuit Court los txhim kho efficiency.CCFL raj yuav tsum muaj "siab siab phaj" txuam siv.Tsuas muaj ob peb hom LCD backlight txoj kev, nrog rau cov LED (Lub teeb Emitting Diode) nrog CCFL (Cold Cathode Fluorescent Lamp) los yog hu ua CCFT (Cold Cathode Fluorescent Tube).
CCFL (txias cathode fluorescent teeb) backlight yog lub ntsiab backlight khoom ntawm LCD TV.It ua hauj lwm thaum lub high voltage ntawm ob kawg ntawm lub raj, raj nyob rau hauv ib tug ob peb hluav taws xob high-ceev cuam tshuam tom qab lub electrode tsim lwm yam electron emission, pib tawm, lub raj ntawm mercury los yog inert roj hluav taws xob tom qab kev cuam tshuam, lub excitation hluav taws xob 253.7 nm ultraviolet lub teeb, ultraviolet excitation ntawm tu cov phosphors ntawm lub raj phab ntsa thiab tsim lub teeb pom kev. CCFL teeb lub neej feem ntau txhais raws li: ntawm 25 ℃ ambient kub, rated tam sim no tsav teeb, brightness txo mus rau 50% ntawm thawj brightness ntawm lub sij hawm ntawm lub teeb lub neej.Tam sim no, lub nominal lub neej ntawm LCD TV backlight tuaj yeem ncav cuag 60,000 teev.CCFL backlight yog tus yam ntxwv ntawm tus nqi qis, tab sis cov xim ua haujlwm. tsis zoo li LED backlight.
LED backlight siv LED li backlight qhov chaw, uas yog lub feem ntau cog lus technology los hloov cov tsoos txias cathode fluorescent raj nyob rau hauv lub neej yav tom ntej.Leds yog ua los ntawm nyias txheej ntawm doped semiconductor khoom, ib tug nrog ib tug tshaj ntawm electrons, thiab lwm yam tsis muaj lawv, tsim kom muaj qhov zoo ntawm cov hluav taws xob los ntawm cov khoom siv hluav taws xob thiab qhov sib xyaw ua ke raws li hluav taws xob dhau, tso tawm lub zog ntau dhau ntawm lub teeb hluav taws xob.Leds nrog cov yam ntxwv sib txawv ntawm cov luminescence tuaj yeem tau txais los ntawm kev siv cov khoom sib txawv semiconductor.Leds twb tau siv hauv kev lag luam tuaj yeem muab xim liab, ntsuab, xiav. , ntsuab, txiv kab ntxwv, amber thiab dawb.Lub xov tooj txawb feem ntau siv dawb LED backlight, thaum lub teeb ci LED siv hauv LCD TV tuaj yeem ua dawb, liab, ntsuab thiab xiav.Hauv cov khoom siv high-end, ntau xim LED backlight kuj tuaj yeem siv los txhim kho cov xim qhia ntxiv, xws li rau lub ntsiab xim LED backlight.Qhov zoo ntawm LED backlighting yog qhov tuab yog thinner, txog 5 cm, thiab xim gamut. yog qhov dav heev, uas tuaj yeem ncav cuag 105% ntawm NTSC xim gamut.Lub luminous flux ntawm dub tuaj yeem txo qis rau 0.05 lumens, uas ua rau qhov sib piv ntawm LCD TV siab txog 10,000: 1.Tam sim no, LED backlight qhov chaw muaj lwm 100,000 teev ntawm lub neej.Tam sim no, qhov teeb meem tseem ceeb txwv. txoj kev loj hlob ntawm LED backlight yog tus nqi, vim hais tias tus nqi yog ntau dua li lub teeb qhov chaw ntawm lub teeb fluorescent txias, LED backlight qhov chaw tsuas yog tshwm sim nyob rau hauv high-end LCD TVS txawv teb chaws.
Qhov zoo ntawm LED backlight qhov chaw
1. Lub vijtsam tuaj yeem ua nyias.Yog tias peb saib ntawm qee lub LCDS, peb tuaj yeem pom tias muaj ob peb lub filament CCFL raj txheej txheem.Backlighting, ntawm qhov tod tes, yog cov khoom siv hluav taws xob tiaj tus, tsis tas yuav muaj cov khoom siv ntxiv.
2. Cov duab zoo dua CCFL backlit screen feem ntau muaj qhov sib txawv ntawm qhov nruab nrab thiab ib puag ncig, thiab qee qhov dawb thaum lub vijtsam dub tag.
CCFL fluorescent teeb, zoo li lub teeb fluorescent, muaj hnub nyoog dhau sij hawm, yog li cov ntxaij vab tshaus laptop ib txwm yuav tig daj thiab tsaus tom qab ob lossis peb xyoos, thaum LED backlit cov ntxaij vab tshaus yuav kav ntev dua, tsawg kawg yog ob lossis peb zaug ntev dua.
Peb txhua tus paub tias cov roj teeb fluorescent xav tau qhov hluav taws xob siab kom tawg mercury vapor, yog li lub zog siv ntawm CCFL screen yog qhov loj, feem ntau 14 ntiv tes siv hluav taws xob ntau dua 20 watts.Leds yog cov khoom siv hluav taws xob uas ua haujlwm ntawm qhov hluav taws xob tsawg, yooj yim hauv cov qauv, thiab siv lub zog me me, ua rau lawv tshwj xeeb tshaj yog zoo rau lub laptop roj teeb lub neej.
5. Ntau tus phooj ywg ib puag ncig cov mercury hauv CCFL teeb yuav ua rau muaj kuab paug rau ib puag ncig, thiab nws yuav nyuaj heev rau kev rov ua dua yam tsis muaj teeb meem.
Ua hauj lwm hauv paus ntsiab lus ntawm CCFL txias cathode fluorescent teeb
Lub cev muaj pes tsawg leeg ntawm CCFL txias cathode fluorescent teeb yog tias cov roj inert Ne + Ar sib xyaw uas muaj cov kab mercury vapor (mg) raug kaw rau hauv ib lub khob iav thiab cov tshuaj fluorescent yog coated rau ntawm phab ntsa sab hauv ntawm lub khob.CCFL txias cathode fluorescent raj emit lub teeb los ntawm striking fluorescent hmoov rau ntawm phab ntsa nrog ultraviolet lub teeb zoo siab los ntawm gaseous mercury los ntawm electrodes ntawm ob kawg ntawm lub raj.Lub wavelength yog txiav txim los ntawm cov khoom ntawm cov khoom fluorescent.
Cov teeb meem ntawm CCFL txias cathode fluorescent teeb
Lub CCFL lub teeb pom kev zoo uas cov kua siv lead ua TV siv feem ntau tam sim no, tsis muaj teeb meem saib los ntawm muab lub teeb pom kev zoo lossis los ntawm cov qauv ntawm lub cev, saib nrog lub hnub ci raj uas peb siv txhua hnub ze heev.Cov teeb pom kev zoo no muaj qhov zoo ntawm cov qauv yooj yim, Tsis tshua muaj kub nce nyob rau saum npoo ntawm lub raj, siab brightness nyob rau saum npoo ntawm lub raj thiab yooj yim ua rau ntau yam duab.Tab sis lub neej kev pab cuam yog luv luv, muaj cov mercury, cov xim gambit yog nqaim, tsuas muaj peev xwm ua tiav NTSC 70% ~ 80% Rau qhov loj - loj TV cov ntxaij vab tshaus, CCFL voltage thiab txuas txuas yeeb nkab ua yog nyuaj.
Ua ntej, qhov mob taub hau loj tshaj plaws yog lub neej luv luv.CCFL backlight kev pabcuam lub neej feem ntau yog 15,000 teev rau 25,000 teev, qhov ntev ntawm kev siv LCD (tshwj xeeb tshaj yog lub laptop LCD), qhov pom tseeb dua qhov ci ntsa iab, hauv kev siv 2-3 xyoos. , LCD npo yuav tsaus, daj, qhov no yog lub neej luv luv ntawm CCFL tsis xws luag los ntawm.
Qhov thib ob, txwv tsis pub cov xim LCD ua si.Txhua pixel hauv LCD yog tsim los ntawm R, G thiab B duab plaub xim blocks, thiab cov xim ua haujlwm ntawm LCD tag nrho yog nyob ntawm qhov ua tau zoo ntawm cov backlight module thiab cov xim lim zaj duab xis.Qhov peb lub ntsiab cov xim ntawm cov yeeb yaj kiab lim yog tib yam li lub teeb dawb tawm los ntawm CCFL (qhov muaj pes tsawg leeg ntawm peb lub ntsiab xim), tab sis CCFL backlight module tsis tuaj yeem ua tau raws li cov qauv tsim, tsuas yog kwv yees li 70% ntawm NTSC tus qauv.
Qhov thib peb, cov qauv yog complex thiab lub brightness tso zis uniformity yog tsis zoo.Vim hais tias txias cathode fluorescent teeb tsis yog lub dav hlau lub teeb qhov chaw, yog li thiaj li yuav ua tau zoo ib yam brightness output ntawm backlight, lub backlight module ntawm LCD yuav tsum tau nruab nrog ntau yam pab kiag li lawm. xws li diffuser phaj, lub teeb qhia phaj thiab reflector phaj.
Plaub, lub ntim loj, kev siv hluav taws xob tsis zoo.Qhov ntim ntawm LCD tsis tuaj yeem txo qis ntxiv vim CCFL backlight yuav tsum muaj diffuser phaj, reflector phaj thiab lwm yam khoom siv kho qhov muag nyuaj.Raws li kev siv hluav taws xob, LCDS siv CCFL raws li lub teeb pom kev zoo. tsis txaus siab, raws li 14-nti LCDS xav tau 20W lossis ntau zog.
Tau kawg, ob xyoos dhau los cov tuam txhab tsim khoom hauv tsev thiab txawv teb chaws pom qhov tsis txaus ntawm cov tsoos CCFL tau ua qee qhov kev txhim kho, zoo li tau mus txog qib siab, cov tuam txhab tshaj tawm tau hais tias cov khawv koob, tab sis cov kev txhim kho no txwv, thiab tsis tuaj yeem tshem tawm tag nrho. CCFL backlight congenital technical defects.
Tam sim no, lub backlight feem ntau yog CCFL raj, tus nqi yuav qis dua me ntsis, cov cuab yeej siv tau zoo dua qub.LED backlighting tseem txwv rau cov khoom siv me me xws li xov tooj ntawm tes, MP3, MP4, thiab lwm yam. Rau cov khoom siv loj loj, nws yog tseem yog ib qho kev taw qhia ntawm kev siv zog.Txawm li cas los xij, nws yog ntau zog-txuag, uas yog nws qhov zoo dua
Post lub sij hawm: Jun-29-2019