Umahluko omkhulu phakathi kwekristale yolwelo kunye neplasma kukuba ikristale elulwelo kufuneka ithembele kumthombo wokukhanya ongenanto, ngelixa i-plasma yeTV iyeyezixhobo zokubonisa i-luminescence esebenzayo. Okwangoku, obona chwephesha bokukhanya kwekristale kwimarike bubandakanya i-LED (i-diode-emitting diode) kunye I-CCFL(isibane esibandayo se-cathode fluorescent).I-LCD ye-LCD yi..I-Liquid Crystal Display imfutshane kwi-Liquid Crystal Display.Ubume be-LCD yiLiquid Crystal ebekwe phakathi kwamaqhekeza eglasi amabini ahambelanayo.Kukho iingcingo ezininzi ezincinci ezithe nkqo nezithe tyaba phakathi kwamaqhekeza amabini eglasi.
I-crystal ye-Liquid ngokwayo ayikhiphi ukukhanya, inokuvelisa kuphela utshintsho lombala, idinga ukukhanya kwe-backlight ukuze ibone imixholo yomboniso.Umahluko phakathi kwezikrini ze-laptop zendabuko, ezisebenzisa i-cold cathode fluorescent tubes (CCFL) njenge-backlight, kunye ne-LED backlit screens, ezisebenzisa ii-diode ezikhupha ukukhanya (ii-leds), yileyo.I-LED eMhlophe ngumthombo wokukhanya, ityhubhu yeCCFL ngumthombo wokukhanya. ube neewatts ezininzi, kufuneka uqwalasele isekethe efanelekileyo yokuqhubela phambili ukuphucula ukusebenza kakuhle. ityhubhu yeCCFL kufuneka ibe "nepleyiti yoxinzelelo oluphezulu" ehambelanayo. Kukho iintlobo ezininzi zendlela yokukhanya kwe-LCD, kubandakanya i-LED (iDiode yokuKhanya) I-CCFL (i-Cold Cathode Fluorescent Lamp) okanye ibizwa ngokuba yi-CCFT (i-Cold Cathode Fluorescent Tube).
I-CCFL (isibane esibandayo se-cathode fluorescent) sesona sixhobo sikhanyisa umva kwi-LCD TV. ityhubhu ye-mercury okanye i-inert gas electronic after the impact, the excitation radiation 253.7 nm ultraviolet light, ultraviolet excitation of tu the phosphors eludongeni lwetyhubhu kwaye ivelise ukukhanya okubonakalayo.Ubomi besibane seCCFL ngokubanzi buchazwa njenge: kwi-25 ℃ ubushushu bendawo, ilinganiswe isibane sokuqhuba ngoku, ukukhanya kuncitshiswe ukuya kwi-50% yokukhanya kokuqala kobude bexesha lobomi besibane. Okwangoku, ubomi obuqhelekileyo be-LCD TV backlight inokufikelela kwiiyure ezingama-60,000. Ukukhanya kwe-CCFL kubonakaliswe ngexabiso eliphantsi, kodwa ukusebenza kombala ayilunganga njengokukhanya kwe-LED ngasemva.
Ukukhanya kwe-LED ngasemva KUSEBENZISA i-LED njengomthombo we-backlight, eyona teknoloji ithembisayo yokubuyisela i-tube ye-cathode fluorescent yendabuko ebandayo kwixesha elizayo. ukudala imingxuma efanelekileyo apho ii-electron kunye nemingxuma zidibanisa njengoko umbane udlula, ukukhulula amandla angaphezulu ngendlela yokukhanya kwemitha.Ii-Leds ezineempawu ezahlukeneyo ze-luminescence zinokufumaneka ngokusebenzisa izinto ezahlukeneyo ze-semiconductor. , eluhlaza, i-orenji, i-amber kunye nemhlophe.Ifowuni ephathwayo ikakhulu ISEBENZISA ukukhanya kwe-LED emhlophe, ngelixa ukukhanya kwe-LED esetyenziswa kwi-LCD TV ingaba mhlophe, obomvu, oluhlaza kunye nohlaza okwesibhakabhaka.Kwiimveliso ezikumgangatho ophezulu, i-backlight ye-LED enemibala emininzi ingasetyenziselwa ukuphucula ngakumbi ukubonakaliswa kombala, njengemibala emithandathu ephambili ye-LED backlight.Inzuzo yokukhanyisa kwe-LED kukuba ubukhulu buncinci, malunga ne-5 cm, kunye nombala we-gamut. ibanzi kakhulu, enokufikelela kwi-105% ye-NTSC yombala we-gamut.I-flux ekhanyayo emnyama ingancitshiswa ibe yi-0.05 lumens, eyenza umlinganiselo wokuchasana kwe-LCD TV ibe phezulu njenge-10,000: 1. Ngelo xesha, umthombo we-LED backlight unenye iiyure ze-100,000 zobomi. Okwangoku, ingxaki ephambili inqanda. uphuhliso lwe-LED backlight luyindleko, kuba ixabiso liphezulu kakhulu kunomthombo wokukhanya wesibane se-fluorescent ebandayo, umthombo we-LED backlight unokuvela kuphela kwi-high-end LCD TVS ngaphandle.
Izinto ezilungileyo zomthombo we-LED backlight
1. Isikrini sinokwenziwa sincinci.Ukuba sijonga ezinye ii-LCDS, sinokubona ukuba kukho iityhubhu ezininzi ze-CCFL ezicwangcisiweyo.I-backlighting, ngakolunye uhlangothi, yinto ephathekayo ekhupha ukukhanya, engadingi zixhobo ezongezelelweyo.
2. Isiphumo esingcono somfanekiso I-CCFL ekhanyisa umva isikrini ngokubanzi inokukhanya okwahlukileyo phakathi naphakathi, kwaye enye imhlophe xa isikrini simnyama ngokupheleleyo.
Izibane ze-CCFL ze-fluorescent, njengezibane ze-fluorescent, ubudala ngokuhamba kwexesha, ngoko izikrini zekhompyutheni zendabuko ziya kuba tyheli kwaye zibe mnyama emva kweminyaka emibini okanye emithathu, ngelixa izikrini ze-LED backlit ziya kuhlala ixesha elide, ubuncinane kabini okanye kathathu ubude.
Sonke siyazi ukuba izibane ze-fluorescent zidinga i-voltage ephezulu kwi-bombade mercury vapor, ngoko ukusetyenziswa kwamandla kwesikrini se-CCFL kukhulu, ngokubanzi i-intshi ye-14 yokusetyenziswa kwamandla angaphezu kwama-watts angama-20. I-Leds i-semiconductors esebenza kwi-voltage ephantsi, ilula kwisakhiwo, kwaye zisebenzise amandla amancinci, zibenza balunge ngakumbi kubomi bebhetri yelaptop.
5. Ukumelana nokusingqongileyo ngakumbi imetyhuri kwizibane zeCCFL iya kubangela ungcoliseko olukhulu kokusingqongileyo, kwaye kuya kuba nzima kakhulu ukuyirisayikilisha ngokungenabungozi.
Umgaqo osebenzayo wesibane se-CCFL se-cathode fluorescent
Ubume bomzimba besibane se-CCFL esibandayo se-cathode fluorescent kukuba igesi engasebenziyo ye-Ne+Ar equlethe umphunga we-mercury (mg) itywinwe kwityhubhu yeglasi kwaye into efluorescent igqunywe kudonga lwangaphakathi lweglasi.CCFL iityhubhu ezibandayo ze-cathode fluorescent khupha ukukhanya ngokubetha umgubo we-fluorescent eludongeni kunye nokukhanya kwe-ultraviolet okuvuyiswa yi-gaseous mercury ngokusebenzisa i-electrodes kuzo zombini iziphelo zombhobho.
Isiphene sesibane esibandayo seCCFL cathode fluorescent
Umthombo wokukhanya weCCFL ukuba ulwelo lwe-crystal TV USEBENZISA ngokuqhelekileyo ngoku, kungakhathaliseki ukuba ukhangele umgaqo wokukhanya okanye uvela kwisakhiwo somzimba, jonga ngetyhubhu yemini esiyisebenzisa imihla ngemihla ngokusondeleyo kakhulu. ukunyuka kobushushu obuphantsi kumphezulu wetyhubhu, ukukhanya okuphezulu kumphezulu wetyhubhu kunye nokusetyenzwa ngokulula kwiimilo ezahlukahlukeneyo. Kodwa ubomi benkonzo bufutshane, buqulethe i-mercury, i-gambit yombala imxinwa, kuphela inokufezekisa i-NTSC 70% ~ 80% .Izikrini ezinkulu zeTV, i-CCFL voltage kunye nokulungiswa kombhobho owandisiweyo kunzima.
Okokuqala, eyona ntloko inkulu bubomi obufutshane.Ubomi benkonzo yokukhanya kwe-CCFL ngokuqhelekileyo ziiyure ezingama-15,000 ukuya kwiiyure ezingama-25,000, ixesha elide ukusetyenziswa kweLCD (ingakumbi i-laptop LCD), kokukhona kuyacaca ngakumbi ukuhla kokukhanya, ekusebenziseni iminyaka eyi-2-3. , isikrini se-LCD siya kuba mnyama, siphuzi, lo bubomi obufutshane be-CCFL iziphene ezibangelwa.
Okwesibini, umda we-LCD umbala play.Ipixel nganye kwi-LCD yenziwe nge-R, G kunye no-B iibhloko zemibala ezixande, kwaye ukusebenza kombala we-LCD kuxhomekeke ngokupheleleyo ekusebenzeni kwemodyuli yokukhanya ngasemva kunye nefilimu yokucoca umbala. imibala yefilimu yokucoca iyafana nokukhanya okumhlophe okukhutshwe yiCCFL (ukwakheka kwemibala emithathu ephambili), kodwa imodyuli yokukhanya ngasemva yeCCFL ayinako ngokwenene ukuhlangabezana neemfuno zoyilo, kuphela malunga ne-70% yomgangatho we-NTSC.
Okwesithathu, ulwakhiwo luyinkimbinkimbi kwaye ukuqaqamba kokuphuma kokukhanya akubikho.Ngenxa yokuba isibane esibandayo se-cathode fluorescent asiyiyo indawo yokukhanya kwendiza, ke ukuze kuphunyezwe ukukhanya okufanayo kokukhanya ngasemva, imodyuli yokukhanya ngasemva yeLCD kufuneka ixhotyiswe ngezixhobo ezininzi ezincedisayo. njengepleyiti ye-diffuser, ipleyiti yesikhokelo esikhanyayo kunye nepleyiti yesibonisi.
Okwesine, umthamo omkhulu, ukusetyenziswa kwamandla akulunganga.Umthamo weLCD awunakuncitshiswa ngakumbi kuba i-CCFL backlight kufuneka iqulethe i-diffuser plate, i-reflector plate kunye nezinye izixhobo ezibonakalayo eziyinkimbinkimbi. awanelisiyo, njengoko i-14-intshi ye-LCDS ifuna i-20W okanye amandla angaphezulu.
Kakade ke, kule minyaka mibini idlulileyo abavelisi basekhaya nabangaphandle, ngenxa yeentsilelo zeCCFL yemveli benza uphuculo oluthile, kubonakala ngathi bafikelele kwinqanaba eliphezulu kakhulu, abavelisi bopapasho kuthiwa umlingo, kodwa olu phuculo lulinganiselwe, kwaye alukwazi ukuphelisa ngokupheleleyo. iCCFL backlight congenital technical defects.
Okwangoku, i-backlight ikakhulu yityhubhu ye-CCFL, ixabiso linokuba lincinci, iteknoloji ikhulile ngakumbi. Ukukhanyisa kwakhona kwe-LED kukhawulelwe kwiimveliso ezincinci zesikrini ezifana neselula, i-MP3, i-MP4, njl. isengumkhombandlela wemizamo.Nangona kunjalo, ukonga amandla ngakumbi, eyona nto iluncedo
Ixesha lokuposa: Jun-29-2019