Taw qhia rau cov qauv ntawm LCD zaub backlight module
Nov 30, 2022
LCD zaub backlight module yog ib qho tseem ceeb ntawm LCD zaub. Nws yog siv los muab lub teeb rau lub LCD vaj huam sib luag, thiab feem ntau muaj ntau lub teeb LED. Hauv tsab xov xwm no, peb yuav qhia koj txog cov qauv ntawm LCD zaub backlight module.
Cov hauv qab no yog cov qauv tsim, qhov xwm txheej tiag tiag yuav nyuaj dua, vim tias nrog kev txhim kho thev naus laus zis, txhua tus txhawm rau kom tus nqi lossis zam patents, yuav siv cov kev daws teeb meem sib txawv los yog kev sib txuas ntawm cov haujlwm, thiab lwm yam, tab sis cov ntsiab lus tseem ceeb yog tib yam.
Ua ntej ntawm tag nrho cov, cia peb saib cov duab kos, sab saum toj yog chav LCD, kuj hu ua cell. nyob rau hauv qab ntawm cov hlau ncej plays lub luag hauj lwm tiv thaiv, xws li cov hlau ncej, tab sis kuj cov yas thav duab, thiab lwm yam, los tiv thaiv sab hauv ntawm optical zaj duab xis los ntawm kev cuam tshuam ntawm sab nraud quab yuam. Raws li txoj kev kho qhov muag pom ib qho los ntawm ib qho.
1. Lub teeb qhov chaw
LED lub teeb bar. Qhov ntxov tshaj plaws yog kev siv CCFL teeb, raws li cov teeb pom kev zoo ntawm LED teeb pom kev zoo, qhov ci ntsa iab, kev txuag hluav taws xob ntau dua, thiab lwm yam zoo, muaj tag nrho sab nraub qaum ntawm LED teeb tsim, uas yog hu ua "ncaj" teeb qhov chaw. Tab sis qhov kev tsim no tsis muaj lawm.
Daim duab 2: Ncaj-down LED teeb qhov chaw
Technology tau hloov zuj zus, nrog rau kev nce hauv LED luminous zog, nrog rau kev tsim ntawm 3M brightening zaj duab xis. Qhov tshwm sim ntawm "sab hom" lub teeb ci, tam sim no yog tiam thib peb.
Daim duab 3: Sab-los-sab LED teeb qhov chaw (dub dashed kab yog LED teeb bar)
Tom qab lub teeb pom kev zoo ntawm LED teeb tawm, lub teeb raug coj los ntawm ntug ntawm lub teeb qhia rau hauv lub teeb qhia los ntawm cov khoom siv npog ntsej muag lossis cov khoom siv reflective.
2. Lub teeb qhia vaj huam sib luag
Lub teeb ci ntawm LED sawb ci los ntawm sab ntug ntawm lub teeb qhia mus rau sab hauv ntawm lub teeb qhia, uas muaj cov ntug zoo li sawtooth.
Thaum lub kaum sab xis ntawm qhov tshwm sim ntawm lub teeb tshaj lub kaum sab xis tseem ceeb θc, ces tag nrho cov kev xav tshwm sim. Thiab tab sis yog tias qee cov duab ua tiav rau hauv qab ntawm lub phaj kom hloov lub kaum sab xis ntawm qhov xwm txheej thiab kev xav.
3. Reflective zaj duab xis
Feem ntau ntawm cov teeb uas tawm ntawm lub teeb qhia kev nce mus, tab sis qee qhov nws mus. Ib feem ntawm lub teeb no kuj yuav tsum tau siv tag nrho, yog li ib zaj duab xis reflective ntxiv rau hauv qab kom tag nrho lub teeb tawm mus rau sab saud.
Qhov zoo tshaj plaws hauv tsev kuj tseem kim tshaj plaws yog 3M reflective films ESR txhim kho daim iav reflective zaj duab xis, qhov kev cuam tshuam tuaj yeem ncav cuag 98%, thiab lwm yam kev pab cuam qis dua.
3M's yog nano-thick txheej, 1/4 ntawm lub teeb ntawm lub teeb. Siv cov txheej txheem kho qhov muag kom nce kev xav, nws feem ntau yog li 500 txheej, tag nrho ntawm 0.065mm tuab. Qhov zoo tshaj plaws, 3M siv cov thev naus laus zis no rau lawv cov projectors, uas tuaj yeem ua tau ntau dua 700 txheej. Tam sim no cov ntaub ntawv feem ntau yog PET ua lub substrate, luam ntawv, los yog lamination ntawm dawb reflective txheej, cov khoom tseem ceeb yog barium sulfate, los yog PET ntawm cov nyiaj reflective txheej.
4. Daim ntawv diffuser
Lub teeb los ntawm lub teeb qhia phaj upwards tom qab, nrog rau daim ntawv qhia txog kev xav txog, mus rau hauv lub diffuser.
Daim ntawv diffusion siv cov khoom nyob rau sab saum toj los ua kom lub teeb muaj lub kaum sab xis loj ntawm lub voj voog ntawm qhov loj me, thiab cov txheej hauv qab no muaj cov nyhuv anti-static los tiv thaiv adsorption nrog lub teeb qhia phaj.
Tsis tas li ntawd, daim ntawv diffusion tuaj yeem plam lub teeb ntawm qhov chaw saum lub teeb qhia phaj; plooj qhov muag tsis pom kev, kom lub teeb tawm sib npaug; tshem tawm Newton lub nplhaib, thiab tshem tawm cov kab txaij optical cuam tshuam.
Kev ua haujlwm ntawm sab sauv diffusion yog qhov tseem ceeb los tiv thaiv BEF prism zaj duab xis, nce lub teeb lub kaum sab xis, thiab lwm yam kom lub teeb sib xws. Tag nrho cov haujlwm no tuaj yeem muab tso rau hauv lwm cov yeeb yaj kiab.
5. BEF Brightening Zaj duab xis
Lub teeb tawm ntawm cov yeeb yaj kiab diffusion, nkag mus rau BEF, Brightness Enhanced Film, tseem hu ua Prism sheet, prism sheet.
Lub teeb los ntawm daim ntawv diffusion tshwm sim nyob rau hauv peb txoj kev, ib qho yog reflected rov qab, txog 50%; Qhov thib ob yog los ntawm refraction, lub teeb mus rau hauv lwm cov yeeb yaj kiab kho qhov muag xws li DBEF; qhov thib peb yog refraction thiab reflection, thiab lwm yam, rau hauv lwm cov qauv prism, uas yog siv dua.
Tom qab cov teeb pom kev zoo ntawm kev cuam tshuam kev cuam tshuam, thiab lwm yam, lub teeb lub zog yuav tau txais kev cawmdim los ntawm 40% -70%. Qhov no tuaj yeem txo qhov kev thov rau LED lub teeb lub zog, txuag hluav taws xob, kev tiv thaiv ib puag ncig, txhim kho ntau yam khoom siv hluav taws xob, thiab lwm yam txiaj ntsig.
6. PAB
DBEF yog Dual Brightness Enhancement Zaj duab xis, uas tuaj yeem hu rau cov yeeb yaj kiab polarization brightening zaj duab xis, qhov backlight sab hauv, yog cov ntsiab lus siab tshaj plaws ntawm cov khoom.
Cov saum toj no yog kev ua haujlwm ntawm DBEF, kev siv ntau yam ntawm cov khoom sib txawv refractive index los tsim ib zaj duab xis multilayer, lub teeb dawb los ntawm DBEF yog polarized parallel rau qhov xwm txheej ntawm Plight thiab perpendicular mus rau qhov xwm txheej ntawm S teeb, P los ntawm German lub ntsiab lus ntawm parallel, S yog ntsug. DBEF, yog li rov qab thiab rov qab qhov teeb meem tshwm sim, lub teeb lub zog yog siv tag nrho kom ua tiav cov txiaj ntsig ntawm kev ci ntsa iab.
