TFT LCD Backlight Kev Lag Luam Thiab Kev Tshawb Fawb

Cov ntaub ntawv tseem ceeb rau loj-loj TFT LCDs suav nrog iav substrates, xim lim, polarizers, tsav ICs, thiab backlight panels. Ntawm ntau cov ntaub ntawv no, lub backlight nws tus kheej muaj ob peb yam ntxim nyiam. Ua ntej, lub backlight nws tus kheej yog ib qho module uas ua ke nrog ntau yam khoom siv kho qhov muag; Thib ob, kev txhim kho thev naus laus zis ntawm lub teeb rov qab nws tus kheej nthuav dav rau thaj chaw ntawm optics, chemistry, electronics, thiab lwm yam; Thaum kawg, tsis muaj qhov tsis ntseeg tias lub teeb pom kev zoo nyob ib puag ncig loj Tus nqi ntawm TFT LCD yog qhov siab heev. Nyob rau hauv lub LCD panels siv nyob rau hauv dav LCD zaub xws li 17-nti thiab 19-nti, lub backlight account rau txog 20% ​​ntawm tus nqi ntawm tag nrho cov ntaub ntawv. Txawm li cas los xij, rau LCD TV panels tshaj 32 ntiv tes, backlight panels Nws tso nyiaj ntau dua 30% ntawm tus nqi.

Qhov tseeb technology thiab tus nqi tiam sis ntawm backlight panels

Ntxiv nrog rau kev siv ib txwm siv ntawm CCFL (Cold Cathode Tube) ua lub teeb ci rau lub teeb pom kev ntawm lub teeb nraub qaum, muaj ntau lub teeb ci thev naus laus zis uas tseem tuaj yeem siv rau ntawm lub teeb nraub qaum. Daim ntawv thov thiab qhov loj ntawm TFT LCD loj yog siv los ua qhov sib txawv, uas tuaj yeem yooj yim cais raws li Phau Ntawv Teev Npe (10 ntiv tes rau 15 ntiv tes), Saib Xyuas (17 ntiv tes rau 19 ntiv tes), Nruab Nrab Loj TV (20 nti), Lub TV loj (26 ntiv tes rau 46 ntiv tes), thiab lwm yam. Cov qauv ntawm lub teeb pom kev zoo tuaj yeem muab faib ua Edge (sab hom) Backlight thiab Direct (direct type) Backlight. Txawm hais tias qee tus neeg tsim khoom siv hom ncaj qha rau ntawm LCD saib vaj huam sib luag, Direct Type backlight feem ntau yog raws li daim ntawv thov tseem ceeb ntawm LCD TV. Raws li rau lub teeb ci, CCFL (txias cathode raj) yog tam sim no lub ntsiab teeb pom kev zoo tshaj plaws, txhua qhov ntau thiab tsawg tau siv dav; EEFL (sab nraud electrode teeb) yog siv nyob rau hauv lub teeb ncaj qha ntawm qee qhov loj-loj LCD TVs; LED (Lub teeb-emitting diodes) tau qhia ib tug polarized txoj kev loj hlob-ntau thiab ntau Notebook panels thiab LCD TV panels tau qhia LEDs li backlights. Txawm li cas los xij, nyob rau hauv LCD Saib ib feem, LED Backlight tau tsim los ntawm cov tuam ntxhab, tab sis nws yog qhov kawg vim qhov kev lees paub ntawm kev lag luam tsawg thiab cov nqi txiav txim siab maj mam ploj mus. Ntawm qhov tod tes, vaj huam sib luag tuam txhab lag luam kuj tau pib ua kom paub FFL (pav ca lub teeb ci) rau qhov loj-loj LCD TV panels. Qhov zoo ntawm FFL yog tias cov qauv yooj yim, thiab tus nqi kuj tseem yuav raug tswj kom pheej yig dua li Backlight zoo tib yam. Tsis tas li ntawd, nyob rau hauv cov nqe lus ntawm tus nqi ntawm Backlight, ntawm no yog cov npe Raws li tus nqi siv ntawm LCD backlights ntawm ntau qhov ntau thiab tsawg los ntawm 2004 txog 2006, lub backlight rau 15.4-nti Notebook PCs xav tias yuav poob los ntawm US $ 25 hauv lub quarter thib plaub. ntawm 2004 txog US $ 20 nyob rau hauv lub quarter thib plaub ntawm 2006; lub backlight rau 19-nti LCD saib yuav raug nqi ob. Hauv lub xyoo, nws tau nqis los ntawm US $ 41 txog US $ 29, nrog qhov poob loj tshaj plaws yog LCD TV Backlights tshaj 32 ntiv tes. Xws li 32 ntiv tes, 40 ntiv tes, thiab lwm yam, yuav raug txo los ntawm 40% mus rau 50% hauv ob xyoos; qhov no feem ntau yog vim qhov txo qis ntawm cov nqi ntawm cov khoom siv kho qhov muag pom los ntawm thaj tsam thiab kev txhim kho cov txiaj ntsig ntawm qhov loj-loj Backlight.

Kev Lag Luam Muaj Peev Xwm rau Backlight Panels

Chaw tsim tshuaj paus sib txawv nyob rau hauv industrial mov saw ntawm loj-loj backlight panels

Tsis muaj tsawg tshaj li kaum ob lub teeb vaj huam sib luag tsim los ntawm Nyiv thiab Kaus Lim Qab Teb, thaum lub teeb ci ntsa iab (BEF) feem ntau yog raws li 3M, tab sis nws cov neeg sib tw xws li Efun thiab Goyo tau loj hlob sai. Cov khoom qub ntawm lub teeb qhia phaj yog Muaj cov neeg muag khoom xws li Asahi, Mitsubishi, Kuraray, thiab Chi Mei Corporation. Qee qhov backlight module manufacturers, xws li Wooyoung, Radiant, Coretronic, thiab lwm yam, tsis tsuas yog muaj peev xwm sib sau ua ke Backlight, tab sis kuj muaj peev xwm txhaj molded lub teeb qhia daim hlau los ntawm lawv tus kheej. Txawm li cas los xij, qee cov tuam txhab lag luam backlight yuav tsum yuav LGP (Light Guide Plate). Raws li rau lub teeb (CCFL) ib feem, Japanese manufacturers tseem tswj feem ntau ntawm lub lag luam teeb.

Hauv lwm lo lus, Harison-Toshiba coj nrog kev lag luam sib koom ntawm 17%, ua raws li Sanken's 14%, Panasonic West's 15%, thiab NEC's 10%. Hauv ntu LED, los ntawm LED tuag rau ntim cov tuam txhab, muaj ntau yam Txawm li cas los xij, OSRAM, Lumileds, thiab Delta uas tam sim no tsim loj-loj TFT LCD LED Backlights muaj qee qhov ua tau zoo. Nyob rau hauv lub diffuser ib feem, Nyiv lub Keiwa tam sim no muaj ib tug 48% kev ua lag luam qhia, thaum lwm tus neeg muaj Manufacturers xws li Tusjiden, SKC, Kimoto, thiab lwm yam; Kev soj ntsuam ntau qhov chaw xa khoom ntawm tag nrho cov loj-loj TFT LCD Backlight, peb tuaj yeem pom tias feem ntau ntawm cov tuam txhab Nyij Pooj tau siab heev, thiab kev ua lag luam ntawm qee qhov chaw qhia txog kev lag luam tsis sib xws, uas yog feem ntau cuam tshuam nrog kev cuam tshuam ntawm kev lag luam. cov khoom siv kho qhov muag lossis cov khoom siv zaj duab xis no muaj feem xyuam, tshwj xeeb tshaj yog cov kaus mom tiv thaiv xws li BEF thiab patents. Ntawm qhov tod tes, cov teeb meem kev teeb meem ntawm CCFL teeb yog qhov tseeb tsis siab, tab sis ruaj khov kev tswj xyuas kev xa khoom tau yeej cov neeg siv khoom; Ntawd yog, vaj huam sib luag manufacturers; ib qho ntawm cov ntsiab lus tseem ceeb yog tias nyob rau hauv ob peb xyoos dhau los, ntxiv rau cov tuam txhab Nyij Pooj uas muaj kev paub dhau los hauv kev tswj kom zoo los tsim cov teeb, lwm cov tuam txhab lag luam yuav tsum siv sijhawm ntau ntxiv los nkag rau hauv lub lag luam teeb.

Industrial Supply Chain Architecture ntawm Backlight Vaj Huam Sib Luag

Lub backlight nws tus kheej yog ib qho module uas muaj ntau yam ntaub ntawv xws li optical films, lub teeb qhov chaw, tshuaj molding, thiab lwm yam., thiab vim hais tias ntawm nws cov loj cov ntaub ntawv, thiab lub vaj huam sib luag manufacturers yog accustomed mus rau ncaj qha tswj cov khoom ntawm ntau yam khoom loj nyob rau hauv cov khoom. thiab xav tau kev sib raug zoo (xws li brightness li zaj duab xis, Teeb thiab txawm diffusers, thiab lwm yam), yog li tsim ib tug complex industrial mov saw thiab ecology; Yeej, muaj cov chaw tsim khoom thiab txiav cov yeeb yaj kiab master (BEF), Reflector (reflector), Diffuser (diffuser), thiab lwm yam. Lub luag haujlwm sib txawv ntawm kev ntim khoom thiab lwm yam, thaum lub teeb lub raj muaj lub teeb lub raj tsim los sib koom tes, lub teeb qhia phaj (Light Guide Plate) yog ua los ntawm raw cov ntaub ntawv xws li acrylic (PMMA) los yog Zeonor thiab lwm yam technologies los koom tes nrog lub teeb qhia phaj tsim chaw tsim tshuaj paus; Cov tuam txhab Backlight feem ntau muaj peev xwm tsim cov ntawv qhia lub teeb ntawm lawv tus kheej; Tsis tas li ntawd, cov chaw muag khoom ntawm cov hlau thav duab, cov thav ntawv yas, thiab lwm yam kuj suav nrog hauv kev lag luam Backlight tag nrho.

Tus nqi qauv ntawm loj-loj backlight panels

Txij li cov qauv ntawm backlight nws tus kheej yog qhov nyuaj heev, nws yog ib txwm tsim nyog los saib xyuas nws cov qauv nqi. Cov npe ntawm no yog tus nqi qauv ntawm qhov loj-loj (10 nti lossis ntau dua) TFT LCD Backlight, suav nrog phau ntawv, LCD saib thiab LCD TV. Lub teeb ci yog feem ntau CCFL raj, ntawm cov uas siv rau LCD TV, kev lag luam kev sib cog lus yog tias Inverter raug xa nrog Backlight, thiab tseem tuaj yeem suav ua ib feem ntawm LCD TV Backlight, yog li nws suav nrog cov qauv nqi. xam; Saib xyuas cov qauv no, koj tuaj yeem nrhiav tau, Phau Ntawv, LCD Saib, 32-nti LCD TVs, thiab LCD TVs saum 32-nti tag nrho tam sim no sib txawv Backlight tus nqi qauv-Notebook Backlight' s brightness li zaj duab xis tso nyiaj rau ntau tshaj plaws. ntawm tus nqi, ncav cuag 25%. Qhov tseeb, qhov no yog vim hais tias yuav luag tag nrho cov Notebook Backlight teeb yog tag nrho ib leeg, yog li tus nqi ntawm lub teeb yog qhov tsawg, thaum lub LCD Saib Xyuas ib feem qhia tau hais tias tus nqi sib txawv ntau dua, thiab nws cov teeb suav txog 17% ntawm tus nqi. Hais txog 26-nti rau 32-nti LCD TV Backlight, dab tsi tau taw qhia ntawm no yog qhov kev coj ua tam sim no ntawm qee cov tuam ntxhab? Tshem cov thawj DBEF brightness li zaj duab xis thiab hloov nws nrog lwm diffuser zaj duab xis. Txawm hais tias qhov ci ntsa iab yuav txo qis me ntsis, Tab sis nws tseem nyob hauv qhov kev lees paub ntawm cov neeg siv khoom, tab sis nws cov nqi tau poob ntau vim qhov kev tshem tawm ntawm DBEF; txoj hauv kev no tau hloov nws cov qauv Backlight tus nqi, tshwj xeeb tshaj yog tom qab DBEF, uas thawj zaug suav txog qhov feem ntau ntawm cov nqi, ploj, thiab lub teeb thiab Inverter dhia. Nws tau dhau los ua qhov hnyav tshaj plaws hauv cov qauv nqi; Nyob rau hauv tas li ntawd, panels saum 37 ntiv tes muaj ib tug loj cheeb tsam thiab diffusion efficiency ntawm lub diffuser, yog li nws yog ib qho nyuaj rau tshem tawm cov DBEF thiab muaj peev xwm ua tau ze brightness them nrog lub Diffuser, yog li DBEF tseem yuav tsum tau thiab account rau ntau tshaj 20. % ntawm tus nqi tag nrho. Rau LCD TV panels loj dua 32 ntiv tes, lub teeb raj thiab DBEF yog ob qho tseem ceeb. Feem ntau, lub teeb rov qab ntawm lub teeb ncaj qha LCD TV vaj huam sib luag tsis yog lub teeb qhia lub phaj, feem ntau vim tias thaj chaw loj, thiab kev ua haujlwm ntawm sab teeb qhia tsis tuaj yeem ua rau lub teeb ci ntawm tag nrho lub vaj huam sib luag, yog li hom ncaj qha yog tau txais yuav, thiab lub rooj tsav xwm diffuser (Diffuser Board) yog siv los hloov cov haujlwm ntawm lub teeb qhia phaj.