TV Teeb Lub Teeb Phaj - LCD Backlight Hom Thiab Tshawb Xyuas Qhov Zoo Thiab Qhov Tsis Zoo

Lub hauv paus ntsiab lus ntawm LCD backlight zaub loj tshaj qhov sib txawv ntawm cov kua siv lead ua thiab kua ntshav yog tias cov kua siv lead ua kua yuav tsum tso siab rau qhov khoom siv hluav taws xob dhau, thaum ntshav TV yog qhov ua kom pom kev ua lub teeb ci. Tam sim no, lub ntsiab hluav taws xob LCD backlight technology ntawm kev ua lag luam suav nrog LED (Lub teeb Emitting Diode) thiab CCFL (Cold Cathode Fluorescent Teeb).

Mob khaub thuas Cathode Fluorescent Teeb (CCFL)

Cov tsoos kua siv hluav taws xob tso tawm siv CCFL (Cold Cathode Fluorescent Teeb) rov qab teeb. Muaj ob lub ntsiab ntawm CCFL backlight tsim:" sab-hom" thiab" ncaj qha-hom", tab sis sab hom teeb tsa kev tsim qauv ua rau tus nqi photorefractive siab dua, uas nyob rau hauv qhov kev txwv tsis pub lub teeb ci rov qab. Qhov loj dua ntawm cov vaj huam sib luag loj dua, qhov ci ci yog qhov tsawg dua nws, nws tsuas yog haum rau 8-nti rau 15-nti TFT LCD vaj huam sib luag, uas yog, rau kev pom tus kheej xws li Laptops thiab Desktops. Txawm li cas los xij, thaum saib loj LCD TVs nyob hauv tsev, qhov ci ci ntawm ib sab - zes hom yuav nyuaj rau kev sib ntsib. Hloov chaw, Ncaj hauv siab.

Txawm li cas los xij, qhov loj dua qhov loj ntawm LCD, qhov siab dua qhov sib piv ntawm tus nqi ntawm nws cov backlight module, uas hais txog feem ntsug hom CCFL backlight module. Raws li kev txheeb cais, feem ntsug hom CCFL backlight module tseem siv. Hauv qhov nti, qhov backlight module tsuas ua rau 23% ntawm tus nqi tag nrho, tab sis nws nce mus rau 37% thaum nws yog 30 ntiv tes, thiab nws kwv yees tias thaum nws yog 57 ntiv tes, tus nqi ntawm qhov backlight module yuav ncav cuag 50%. Yog li, qhov nqes-nqis CCFL backlight tsuas yog haum rau siv nyob rau hauv nruab nrab LCD TV ntawm kwv yees li 30 ntiv, thiab nws tsis tsim rau siv hauv thaj chaw loj tsim. Tib lub sijhawm, CCFL siv roj av muaj roj paug tawm mus rau kev tsim teeb pom kev. Txawm hais tias RoHS cov cai tam sim no tau teev tseg los ntawm European Union, ntev li ntev tau cov koob tshuaj ntawm" mercury" qis dua tus qauv, nws tseem siv tau, tab sis tsis muaj leej twg tuaj yeem lav tias tus qauv yuav raug tsa mus rau xoom yav tom ntej (tsis pub siv txhua lub sijhawm), tom qab ntawd CCFL yuav tsis muaj, lossis koj yuav tsum hloov mus rau ib qho mercury -Free CCFL.

Txawm hais tias CCFL tsis muaj kua muaj mercury raws li ua tau los ntawm kev tsim kho, CCFL tseem tseem yog roj tawm hluav taws xob teeb pom kev zoo nrog lub raj roj fluorescent kaw. Kev tawm tsam ntawm cov roj fluorescent mus rau sab nraud muaj qhov txwv. Ib qho kev cuam tshuam loj yuav ua rau lub raj roj fluorescent ua rau tawg thiab ua rau lub teeb pom kev ua tsis tiav. Lwm qhov teeb meem nyob ruaj khov hauv cov hluav taws xob (xws li LED) tsis muaj kev txhawj xeeb zoo li no. Tsis tas li ntawd, txij li hom ncaj qha poob qis tsis tas yuav muaj lub teeb qhia kev coj ua thiab yog qhov pub dawb los ntawm kev tsim kev puas tsuaj photorefractive, nws tsis xav tau kev ua kom zoo dua qub zaj duab xis, tshwj xeeb tshaj yog cov duab ci ci kev ua yeeb yaj kiab yog patented technology ntawm ob peb tuam txhab, thiab tus nqi yog qhov kim. Lub teeb board thiab lub zog ua kom zoo dua zaj duab xis, uas ua rau txo nqi.

Txawm li cas los xij, txoj kev nco-down CCFL kuj muaj nws qhov shortcomings. Txhawm rau txhawm rau ua kom pom kev ci ntsa iab ntawm daim duab, cov naj npawb ntawm cov kav dej yuav tsum tau nce. Txawm li cas los xij, qhov tshwm sim ntawm kev ntom ntom ntom ntawm cov yeeb nkab hluav taws xob yuav tsis muaj txiaj ntsig zoo rau cov cua sov ua kom sov. Txij li qhov kev ncua deb ntawm cov theem sab laug thiab sab raug txo kom tsawg, kev tshav kub kub mus los yuav tsum tau nce los ntawm cov txheej txheem tuab. Qhov chaw, txawm li cas los xij, qhov kev nce qib hauv qhov tuab kuj sib npaug rau qee qhov kev ua kom zoo dua ntawm qhov ua tau zoo hauv TV TV: lub teeb thiab nyias.

Qhov tsis tshua muaj tshwm sim, thaum siv CCFL lub teeb lub raj rau qhov loj-nti LCD TV, qhov ntev ntawm lub teeb lub raj yuav tsum tau nce ntxiv rau hauv kev teb rau qhov nce ntawm cov ntiv taw. Txawm li cas los xij, kom ntev dua CCFL lub teeb raj ntev dua, qhov chaw nruab nrab thiab ob tog ntawm lub teeb raj yuav yog Qhov teeb meem ntawm ci ntsa MURA thiab xim MURA yooj yim tshwm sim, uas cuam tshuam rau lub teeb tsis sib xws ntawm lub teeb nrig. Txhawm rau kom muaj lub teeb uniformity, ib zaj yeeb yaj kiab diffusion yuav tsum siv los txhim kho lub teeb uniformity, tab sis diffusion zaj duab xis kuj tseem yuav ua kom poob ntawm lub teeb hloov mus. Txhawm rau kom txo qhov ci ci, qhov tshwm sim ntawm lub teeb ci tsawg yuav tsum tau ntxiv dag zog los ntawm kev nce tus naj npawb ntawm lub teeb kav, tab sis raws li tau hais ua ntej: ntxiv cov kav dej lub teeb yuav ua rau nws nyuaj rau tsim cov cua sov ua kom sov, ua kom cov tuab ntawm cov backlight module, thiab txawm hais tias siv fais fab noj ntau ntxiv. Nws to taub tias kev siv hluav taws xob ntawm CCFL backlight modules tau suav txog 90% ntawm tag nrho kev siv hluav taws xob ntawm LCD TVs. Yog li no, hloov cov thev naus laus zis technology yog ib qho ntawm cov lus qhia tam sim no rau kev hloov LCD duab duab kom zoo.

Lub teeb Emitting Diode (LED)

Txij li CCFL backlight muaj ntau qhov kev tshwm sim thiab kev ua xyem xyav, qhov kev lag luam tseem tab tom nrhiav rau ntau yam tshiab ntawm qhov backlight kev siv tshuab, thiab LED yog ib qho ntawm cov kev daws teeb meem, xws li Sony's Qualia series TV, uas yog high-end loj-loj ( 40 ntiv, 46 ntiv taw) LCD TV, nws feem backlight ua los ntawm WLED, yog hu ua WLED backlight technology. Kev soj ntsuam LCD Saib thiab kev loj hlob ntawm LED backlight thev naus laus zis kuj tau mus txog theem zoo. Peb tuaj yeem pom cov khoom lag luam cuam tshuam ntawm cov khoom ntawm CES CES xyoo 2007.

LED backlight muaj ntau yam zoo. Ua ntej, cov khoom siv hluav taws xob zoo. Nws qhov kev cuam tshuam rau kev cuam tshuam yog siab dua qhov ntawm CCFL. Tsis muaj ib puag ncig kev tiv thaiv kev tswj hwm kev txhawj xeeb ntawm mercury cov pa roj, tsis muaj kev txhawj xeeb txog kev tiv thaiv UV ultraviolet to, thiab ob qho xim daj thiab lub neej. Tshaj li CCFL, LEDs tuaj yeem tsav tau ntev li ntev tau thaum lawv tsav los ntawm lub zog hluav taws xob. Tsis zoo li CCFL, uas yuav tsum tau hloov pauv mus rau qhov zoo thiab qhov tsis zoo rau hluav taws xob, txawm tias nws tsuas yog qhov zoo tsav voltage, qhov kev thov ntawm LEDs tseem qis dua ntawm CCFL. Tsis tas li ntawd, qhov ci ci ntawm LED tuaj yeem hloov kho tsuas yog los ntawm Pulse Dav Dav Modulation (PWM), thiab tib txoj kev tuaj yeem siv los tiv thaiv qhov teeb meem tom qab ntawm TFT LCD zaub. Txawm li cas los xij, kev kho lub teeb ci ntawm CCFL yog qhov nyuaj dua. Thiab lub sijhawm tom qab tsis tuaj yeem raug kev nqhis, nws yuav tsum raug tsim txom hauv lwm txoj kev.

Txawm hais tias LED backlight muaj ntau yam zoo, nws tseem muaj nws qhov tsis zoo. Thawj yog luminous efficiency. Hais txog tib lub zog siv hluav taws xob, LED tsis zoo li CCFL, yog li cov teeb meem kub ua kom sov yuav muaj teeb meem loj dua CCFL. Ntxiv rau, LED yog qhov taw tes-hom teeb pom kev zoo, uas zoo sib xws rau CCFL' s hom kab tawm. Lub teeb lub teeb yog qhov nyuaj dua los tswj lub teeb uniformity tshaj li cov teeb ci tiag tiag. Yuav kom ua tiav ntau lub teeb sib xws kom ntau li ntau tau, cov yam ntxwv ntawm cov LEDs tsim tawm yuav tsum tau ua tib zoo xaiv, thiab ntau qhov ntawm LED uas muaj cov yam ntxwv sib xws (yoj yoj, lub teeb ci) yog siv rau tib lub teeb liab ntawm lawv, tus nqi ntawm qhov no xaiv kuj yog siab kawg. Qhov zoo, luminous efficiency ntawm LED yog tseem txhim kho. Tam sim no, nws muaj peev xwm ncav cuag ntau dua 100 ml / W. Nyob rau hauv txoj kev no, xim saturation tuaj yeem ua tau zoo dua, thiab WLED kev teeb tsa ntawm lub teeb rov qab tuaj yeem so ntau dua, thiaj li daws cov teeb meem ntawm lub zog siv hluav taws xob thiab kev kub tawm. , Thiab tom qab kev tsim khoom lag luam tus nqi txuas ntxiv txhim kho thiab paub tab, tus nqi ua tib zoo xaiv LEDs nrog cov yam ntxwv tsis xws li kev ci ntsa iab tseem yuav raug txo kom tsawg.

Hloov cov thev naus laus zis thev naus laus zis ib leeg yuav tsis txaus tuaj yeem ua rau lub kiv puag ncig LCD, yog li cia' s ua tibzoo saib lwm lub LCD tsim thev naus laus zis. OLED (Organic Light Emitting Diode) yog cov organic ua lub teeb ci. OLED cov thev naus laus zis sib txawv ntawm cov tsoos LCD saib cov qauv siv. Nws tsis tas yuav muaj lub teeb thaub qab, thiab siv cov txheej txheem ntau ntawm cov khoom siv organic thiab tsom iav. Thaum tam sim no dhau los ntawm, cov ntaub ntawv organic yuav tawm. Ntxiv mus, OLED cov zaub npo tuaj yeem ua kom sib zog dua thiab ua kom pom dua, nrog qhov pom qhov pom loj dua, thiab tuaj yeem txuag hluav taws xob. Txawm li cas los xij, nws lub neej tam sim no thiab tus nqi yog qhov txwv uas txwv nws txoj kev loj hlob hauv LCD.