Kusiyana kwakukulu pakati pa kristalo wamadzimadzi ndi plasma ndikuti galasi lamadzimadzi liyenera kudalira gwero lowala, pomwe plasma TV ndi ya zida zowonetsera zowunikira. CCFL(cold cathode fluorescent nyale).LCD LCD ndi..Liquid Crystal Display ndi yachidule ya Liquid Crystal Display.Kapangidwe ka LCD ndi Liquid Crystal yoyikidwa pakati pa magalasi awiri ofanana.Pali mawaya ang'onoang'ono oyima ndi opingasa pakati pa zidutswa ziwiri za galasi.
Madzi amadzimadzi pawokha samatulutsa kuwala, amatha kutulutsa kusintha kwa mitundu, amafunikira kuwala kwambuyo kuti awone zomwe zili muwonetsero. zomwe zimagwiritsa ntchito ma diode otulutsa kuwala (ma LED), ndiye kuti. Muli ndi ma Watts angapo, muyenera kuganizira zoyendetsa zoyendetsa bwino kuti muwongolere bwino. Chubu la CCFL liyenera kukhala ndi "mbale yothamanga" yofananira. Pali mitundu ingapo ya LCD backlight way, kuphatikiza LED (Light Emitting Diode) yokhala CCFL (Cold Cathode Fluorescent Lamp) kapena amatchedwa CCFT (Cold Cathode Fluorescent Tube).
CCFL (cold cathode fluorescent nyali) backlight ndiye chowunikira chachikulu chakumbuyo cha LCD TV. Imagwira ntchito pomwe ma voteji okwera malekezero onse a chubu, chubu mkati mwamagetsi othamanga kwambiri pambuyo poti ma elekitirodi atulutsa ma elekitironi achiwiri, adayamba kutulutsa, chubu cha mercury kapena inert gasi wamagetsi pambuyo pamphamvu, kutentha kwa 253.7 nm ultraviolet kuwala, ultraviolet excitation of tu the phosphors pa khoma la chubu ndikupanga kuwala kowoneka. CCFL nyali moyo amatanthauzidwa ngati: pa 25 ℃ yozungulira kutentha, oveteredwa nyali yamakono, kuwala kumachepetsedwa kufika ku 50% ya kuwala koyambirira kwa nthawi yayitali ya moyo wa nyali.Pakali pano, moyo wamwadzina wa LCD TV backlight ukhoza kufika maola a 60,000. CCFL backlight imadziwika ndi mtengo wotsika, koma mawonekedwe a mtundu sichili bwino ngati kuwala kwa LED.
Kuwala kwa LED AMAGWIRITSA NTCHITO LED monga gwero la backlight, yomwe ndi teknoloji yodalirika kwambiri yosinthira chubu chozizira cha cathode fluorescent m'tsogolomu. kupanga mabowo opangidwa bwino omwe ma electron ndi mabowo amaphatikizana pamene magetsi akudutsa, kutulutsa mphamvu zochulukirapo mu mawonekedwe a kuwala kwa radiation.Ma LED okhala ndi maonekedwe osiyanasiyana a luminescence angapezeke pogwiritsa ntchito zipangizo zosiyana siyana za semiconductor.Ma LED omwe amagwiritsidwa ntchito kale pamalonda angapereke zofiira, zobiriwira, zabuluu. , zobiriwira, lalanje, amber ndi zoyera.Foni yam'manja makamaka AMAGWIRITSA NTCHITO kuwala kwa LED koyera, pamene kuwala kwa LED komwe kumagwiritsidwa ntchito mu LCD TV kungakhale koyera, kofiira, kobiriwira ndi buluu.Pazogulitsa zapamwamba, zowunikira zamitundu yambiri za LED zitha kugwiritsidwanso ntchito kupititsa patsogolo mawonekedwe amtundu, monga mitundu isanu ndi umodzi yoyambirira ya LED. ndi lalikulu kwambiri, amene angafikire 105% ya NTSC mtundu gamut.Kuwala kowala kwakuda kumatha kuchepetsedwa kukhala 0.05 lumens, zomwe zimapangitsa kusiyana kwa LCD TV kukhala 10,000: 1. Panthawi imodzimodziyo, gwero la kuwala kwa LED lili ndi maola ena a 100,000. Pakalipano, vuto lalikulu likuletsa chitukuko cha kuwala kwa LED ndi mtengo wake, chifukwa mtengo ndi wapamwamba kwambiri kuposa kuwala kwa nyali yozizira ya fulorosenti, gwero la kuwala kwa LED likhoza kuwoneka mu LCD TVS yapamwamba kunja.
Ubwino wa LED backlight source
1. Chophimbacho chikhoza kukhala chochepa thupi.Ngati tiyang'ana pa maLCDs ena, tikhoza kuona kuti pali machubu angapo a CCFL opangidwa.
2. Bwino chithunzi zotsatira CCFL backlit chophimba zambiri kuwala osiyana pakati ndi mozungulira, ndi ena oyera pamene chophimba ndi chakuda kwathunthu.
Nyali za fulorosenti za CCFL, monga nyali za fulorosenti, zimakalamba pakapita nthawi, kotero zowonetsera zamtundu wa laputopu zimasanduka zachikasu ndi mdima patatha zaka ziwiri kapena zitatu, pamene zowonetsera zowunikira za LED zimakhala nthawi yaitali, osachepera kawiri kapena katatu.
Tonse tikudziwa kuti nyali za fulorosenti zimafunikira voteji yapamwamba kuti ipangitse mpweya wa mercury, kotero kuti mphamvu yogwiritsira ntchito chophimba cha CCFL ndi yaikulu, nthawi zambiri inchi 14 yamagetsi ogwiritsira ntchito mphamvu zoposa 20 Watts. ndikugwiritsa ntchito mphamvu zochepa, kuwapanga kukhala abwino kwambiri pa moyo wa batri la laputopu.
5. Kusamala kwambiri ndi chilengedwe mercury mu magetsi a CCFL idzawononga kwambiri chilengedwe, ndipo zidzakhala zovuta kwambiri kukonzanso mopanda vuto.
Mfundo yogwira ntchito ya nyali ya CCFL ozizira cathode fulorosenti
Maonekedwe a nyali ya CCFL ozizira cathode fluorescent ndi yakuti mpweya wa inert Ne+Ar wosakaniza wokhala ndi trace mercury vapor (mg) umasindikizidwa mu chubu lagalasi ndipo chinthu cha fulorosenti chimakutidwa pakhoma lamkati la galasi.CCFL ozizira cathode fulorosenti machubu zimatulutsa kuwala ndi kumenya fulorosenti ufa pakhoma ndi ultraviolet kuwala wokondwa ndi mpweya mercury kudzera maelekitirodi malekezero onse a chubu.
Kuwonongeka kwa nyali ya CCFL ozizira cathode fulorosenti
Gwero la kuwala kwa CCFL lomwe TV ya crystal yamadzimadzi AMAGWIRITSA NTCHITO kawirikawiri pakalipano, ziribe kanthu kuyang'ana kuchokera ku mfundo yowunikira kapena kuchokera ku thupi, yang'anani ndi chubu cha masana chomwe timagwiritsa ntchito tsiku ndi tsiku pafupi kwambiri. kutentha kwapang'onopang'ono kumakwera pamwamba pa chubu, kuwala kwakukulu pamwamba pa chubu ndikuwongolera mosavuta mumitundu yosiyanasiyana.Koma moyo wautumiki ndi waufupi, uli ndi mercury, mtundu wa gambit ndi wopapatiza, wokhawo angakwaniritse NTSC 70% ~ 80%.Kwa zazikulu - zowonetsera TV zazikulu, CCFL voteji ndi kukonza chitoliro chowonjezera ndizovuta.
Choyamba, mutu waukulu kwambiri ndi moyo waufupi wa moyo.CCFL backlight service nthawi zambiri imakhala maola 15,000 mpaka maola 25,000, kugwiritsa ntchito LCD (makamaka laputopu LCD), ndikuwonekeratu kuti kuwala kumachepa, pogwiritsa ntchito zaka 2-3. , chophimba cha LCD chidzakhala chakuda, chachikasu, uwu ndi moyo waufupi wa zolakwika za CCFL zomwe zimayambitsidwa ndi.
Chachiwiri, malire a mtundu wa LCD play.Pixel iliyonse mu LCD imapangidwa ndi R, G ndi B midadada yamakona amakona anayi, ndipo mawonekedwe amtundu wa LCD amadalira kwathunthu ntchito ya backlight module ndi film filter film.The atatu oyambirira mitundu ya filimu fyuluta ndi yofanana ndi kuwala koyera lopangidwa ndi CCFL (kapangidwe ka mitundu itatu yaikulu), koma CCFL backlight gawo sangathe kwenikweni kukwaniritsa zofunika kapangidwe, kokha za 70% ya muyezo NTSC.
Chachitatu, kapangidwe kake ndi kovutirapo ndipo kutulutsa kowala kofananako ndikosavuta. Chifukwa nyali yozizira ya cathode fulorosenti si gwero la kuwala kwa ndege, kotero kuti mukwaniritse kuwala kofananira kutulutsa kwa backlight, gawo la backlight la LCD liyenera kukhala ndi zida zambiri zothandizira. monga diffuser mbale, kuwala kalozera mbale ndi reflector mbale.
Chachinayi, voliyumu yayikulu, kugwiritsa ntchito mphamvu sikwabwino.Voliyumu ya LCD silingachedwenso chifukwa CCFL backlight iyenera kukhala ndi diffuser plate, reflector plate ndi zida zina zovuta zowonera.Pogwiritsa ntchito mphamvu, maLCDs omwe amagwiritsa ntchito CCFL ngati nyali yakumbuyo amakhalanso zosasangalatsa, monga 14-inchi maLCDs amafunikira 20W kapena mphamvu zambiri.
Kumene, zaka ziwiri zapitazi opanga zoweta ndi akunja poona zolakwa za CCFL chikhalidwe anapanga kusintha zina, zikuoneka kuti afika pa mlingo wapamwamba kwambiri, opanga kulengeza akuti matsenga, koma kusintha izi ndi zochepa, ndipo sangathe kuthetsa kwathunthu. CCFL backlight congenital technical defects.
Pakalipano, kuunikira kumbuyo kumakhala makamaka CCFL chubu, mtengo ukhoza kukhala wotsika pang'ono, teknoloji ndi yokhwima.Kuwunikiranso kwa LED kumangokhala ndi zinthu zazing'ono zowonetsera monga foni yam'manja, MP3, MP4, ndi zina. akadali chitsogozo cha zoyesayesa.Komabe, ndizopulumutsa mphamvu zambiri, zomwe ndi ubwino wake
Nthawi yotumiza: Jun-29-2019