Babban bambanci tsakanin kristal ruwa da plasma shine kristal ruwa dole ne ya dogara da tushen haske mai ƙarfi, yayin da TV ɗin plasma ta kasance cikin kayan aikin nunin luminescence. CCFL.Tsarin LCD Liquid Crystal wanda aka sanya tsakanin gilashin guda biyu masu kama da juna.Akwai ƙananan wayoyi a tsaye da a kwance a tsakanin gilashin guda biyu.
Liquid crystal kanta ba ya fitar da haske, zai iya samar da canje-canjen launi kawai, yana buƙatar hasken baya don ganin abubuwan da ke cikin nunin.Bambanci tsakanin allon kwamfutar tafi-da-gidanka na gargajiya, wanda ke amfani da tubes na cathode fluorescent tubes (CCFL) mai sanyi a matsayin hasken baya, da kuma LED backlit fuska. Waɗanda ke amfani da diodes masu fitar da haske (ledos), shine. White LED shine tushen haske, CCFL tube shine tushen hasken haske. Ƙananan fararen ledoji ana amfani da su ta hanyar kai tsaye (dc), wanda za'a iya amfani dashi a cikin tandem, amma idan kun da fiye da 'yan watts, kana bukatar ka yi la'akari da dace drive kewaye don inganta efficiency.CCFL tube dole ne a yi "high matsa lamba farantin" matching use.Just akwai da dama irin LCD backlight hanya, ciki har da LED (Light Emitting Diode) tare da CCFL (Cold Cathode Fluorescent Lamp) ko kuma ana kiranta CCFT (Cold Cathode Fluorescent Tube).
CCFL (cold cathode fluorescent fitila) backlight ne babban backlight samfurin LCD TV.It aiki a lokacin da high irin ƙarfin lantarki a kan duka iyakar tube, tube a cikin 'yan lantarki high-gudun tasiri bayan da lantarki samar da sakandare electron watsi, fara fitarwa, da bututu na mercury ko inert gas lantarki bayan da tasiri, da excitation radiation 253.7 nm ultraviolet haske, ultraviolet tashin hankali na tu da phosphor a kan tube bango da kuma samar da bayyane haske.CCFL fitilar rayuwa ne kullum bayyana a matsayin: a 25 ℃ yanayi zazzabi, rated. Fitilar tuƙi na yanzu, haske ya rage zuwa 50% na farkon haske na tsawon lokaci don rayuwar fitilar. A halin yanzu, rayuwa mara kyau na hasken baya na LCD TV na iya kaiwa sa'o'i 60,000. CCFL hasken baya yana da ƙarancin farashi, amma aikin launi. ba shi da kyau kamar hasken baya na LED.
LED backlight AMFANI LED a matsayin backlight tushen, wanda shi ne mafi alƙawarin fasaha don maye gurbin gargajiya sanyi cathode fluorescent tube a nan gaba.Leds aka yi da bakin ciki yadudduka na doped semiconductor abu, daya tare da wani wuce haddi na electrons, da kuma sauran ba tare da su. ƙirƙirar ramukan da aka caje da kyau ta hanyar da electrons da ramuka suna haɗuwa yayin da wutar lantarki ke wucewa, suna sakewa da wuce haddi makamashi a cikin nau'i na haske radiation.Leds tare da daban-daban luminescence halaye za a iya samu ta hanyar yin amfani da daban-daban semiconductor kayan.Leds riga a kasuwanci amfani iya samar da ja, kore, blue. , kore, lemu, amber da fari. Wayar hannu galibi tana amfani da farar hasken baya na LED, yayin da hasken bayan LED da ake amfani da shi a LCD TV yana iya zama fari, ja, kore da shudi.A cikin samfurori masu mahimmanci, ana iya amfani da hasken baya na LED mai launi da yawa don ƙara inganta yanayin launi, irin su manyan launuka shida na LED. yana da faɗi sosai, wanda zai iya kaiwa 105% na gamut launi na NTSC.Za'a iya rage hasken haske na baƙar fata zuwa 0.05 lumens, wanda ya sa bambancin rabo na LCD TV ya kai 10,000: 1. A lokaci guda kuma, tushen hasken baya na LED yana da wasu sa'o'i 100,000 na rayuwa. A halin yanzu, babban matsala yana ƙuntatawa. haɓakar hasken wutar lantarki na LED shine farashin, saboda farashin ya fi girma fiye da tushen hasken fitilar fitila mai kyalli mai sanyi, tushen hasken hasken LED kawai zai iya bayyana a cikin babban LCD TVS a ƙasashen waje.
Amfanin tushen hasken baya na LED
1. Ana iya sanya allon ya zama bakin ciki.Idan muka dubi wasu LCDS, za mu iya ganin cewa akwai da dama filament CCFL shambura shirya.Backlighting, a daya bangaren, shi ne lebur haske-emitting abu, ba bukatar wani ƙarin na'urorin.
2. Mafi kyawun tasirin hoto CCFL backlit allon gabaɗaya yana da haske daban-daban a tsakiya da kewaye, da wasu fararen lokacin da allon ya kasance baki ɗaya.
Fitilar fitilun CCFL, kamar fitilu masu kyalli, shekaru akan lokaci, don haka allon kwamfutar tafi-da-gidanka na al'ada za su juya launin rawaya da duhu bayan shekaru biyu ko uku, yayin da allon bangon LED zai daɗe, aƙalla sau biyu ko uku.
Dukanmu mun san cewa fitilu masu kyalli suna buƙatar babban ƙarfin lantarki don bombade mercury tururi, don haka amfani da wutar lantarki na allon CCFL yana da girma, gabaɗaya inci 14 na amfani da wutar lantarki fiye da watts 20. Leds sune semiconductors waɗanda ke aiki a ƙananan ƙarfin lantarki, suna da sauƙi a cikin tsari, kuma suna amfani da ƙaramin ƙarfi, yana mai da su musamman ga rayuwar batirin kwamfutar tafi-da-gidanka.
5. Ƙarin dacewa da muhalli, mercury a cikin fitilun CCFL zai haifar da gurɓataccen yanayi ga muhalli, kuma zai yi wuya a sake yin amfani da shi ba tare da lahani ba.
Ka'idar aiki na CCFL sanyi cathode fitilar fitila
Abubuwan da ke cikin jiki na CCFL sanyi cathode fitilar fitilar ita ce inert gas Ne + Ar cakuda mai dauke da alamar mercury tururi (mg) an rufe shi a cikin bututun gilashi kuma abu mai kyalli yana mai rufi a bangon ciki na gilashin.CCFL sanyi cathode fluorescent tubes. fitar da haske ta hanyar buge foda mai kyalli a bango tare da hasken ultraviolet mai farin ciki da mercury gaseous ta hanyar lantarki a bangarorin biyu na bututu. Tsawon tsayin tsayi yana ƙaddara ta kaddarorin kayan kyalli.
Lalacewar CCFL sanyi cathode fitilar fluorescent
The CCFL haske Madogararsa cewa ruwa crystal TV AMFANI da yawanci a halin yanzu, komai duba daga ba da kashe haske manufa ko daga jiki tsarin, duba tare da hasken rana tube da muke amfani da yau da kullum kusa. ƙananan zafin jiki ya tashi a saman bututu, babban haske a saman bututu da sauƙin sarrafawa cikin siffofi daban-daban.Amma rayuwar sabis ɗin gajere ne, ya ƙunshi mercury, launi gambit kunkuntar, kawai zai iya cimma NTSC 70% ~ 80% Don manyan - girman girman allon TV, ƙarfin lantarki na CCFL da sarrafa bututu mai tsayi yana da wahala.
Na farko, babban ciwon kai shine ɗan gajeren rayuwa. Rayuwar sabis na hasken baya na CCFL gabaɗaya shine sa'o'i 15,000 zuwa sa'o'i 25,000, tsawon lokacin amfani da LCD(musamman kwamfutar tafi-da-gidanka LCD), mafi ƙaranci raguwar haske, cikin amfani da shekaru 2-3. , LCD allon zai zama duhu, rawaya, wannan shi ne gajeren rayuwa na CCFL lahani lalacewa ta hanyar.
Na biyu, yana iyakance wasan launi na LCD.Kowane pixel a cikin LCD ya ƙunshi tubalan R, G da B rectangular launi, kuma aikin launi na LCD gaba ɗaya ya dogara da aikin tsarin hasken baya da fim ɗin tace launi. Launuka na fim ɗin tace iri ɗaya ne da farin haske da CCFL ke fitarwa (abin da ke tattare da launuka na farko guda uku), amma tsarin hasken baya na CCFL ba zai iya cika buƙatun ƙira ba, kawai kusan 70% na ma'aunin NTSC.
Na uku, tsarin yana da rikitarwa kuma daidaiton fitowar haske ba shi da kyau.Saboda sanyin cathode fluorescent fitila ba shine tushen hasken jirgin sama ba, don haka don cimma daidaiton haske na hasken baya, tsarin hasken baya na LCD yana buƙatar sanye take da na'urori masu yawa. kamar farantin mai watsawa, farantin jagorar haske da farantin haske.
Na hudu, babban girma, yawan amfani da wutar lantarki ba shi da kyau.Ba za a iya rage girman girman LCD ba saboda CCFL backlight dole ne ya ƙunshi farantin mai yaduwa, farantin mai nuna alama da sauran hadaddun na'urorin gani. rashin gamsuwa, kamar yadda 14-inch LCDS ke buƙatar ƙarfin 20W ko fiye.
Tabbas, a cikin shekaru biyu da suka gabata masana'antun gida da na waje a cikin la'akari da gazawar CCFL na gargajiya sun yi wasu gyare-gyare, da alama sun kai matsayi mai girma, tallan masana'anta an ce sihiri, amma waɗannan haɓakawa suna da iyaka, kuma ba za su iya kawar da su gaba ɗaya ba. da CCFL backlight na haifuwa lahani fasaha.
A halin yanzu, hasken baya shine mafi yawan tube na CCFL, farashin na iya zama ƙasa kaɗan, fasaha ya fi girma. LED backlighting kuma yana iyakance ga ƙananan kayan allo kamar wayar hannu, MP3, MP4, da dai sauransu. Ga manyan samfuran allo, shi ne. har yanzu alkiblar kokarin.Duk da haka, yana da ƙarin tanadin makamashi, wanda shine amfaninsa
Lokacin aikawa: Yuni-29-2019