Hauv kev ua haujlwm ntawm LED puv xim zaub, kev ua haujlwm ntawm tus tsav tsheb IC yog kom tau txais cov ntaub ntawv tso tawm (los ntawm daim npav tau txais lossis video processor thiab lwm cov ntaub ntawv xov xwm) uas ua raws li cov txheej txheem, sab hauv tsim PWM thiab lub sijhawm hloov pauv tam sim no, thiab refresh cov zis thiab brightness grayscale.thiab lwm yam PWM tam sim no los teeb lub LEDs.Lub peripheral IC tsim los ntawm tus tsav tsheb IC, logic IC thiab MOS hloov ua ke ntawm kev ua haujlwm ntawm LED zaub thiab txiav txim siab cov txiaj ntsig uas nws nthuav tawm.
LED tsav chips tuaj yeem muab faib ua cov khoom siv dav dav thiab cov khoom siv tshwj xeeb.
Lub npe hu ua cov hom phiaj dav dav, lub nti nws tus kheej tsis yog tsim tshwj xeeb rau LED, tab sis qee qhov logic chips nrog qee qhov kev ua haujlwm ntawm LED zaub screen (xws li series-2-parallel hloov npe).
Cov nti tshwj xeeb yog hais txog tus tsav tsheb nti tshwj xeeb uas tsim los rau LED zaub raws li cov yam ntxwv luminous ntawm LED.LED yog tam sim no yam ntxwv ntaus ntawv, uas yog, nyob rau hauv lub premise ntawm saturation conduction, nws brightness hloov nrog kev hloov ntawm tam sim no, es tsis yog los ntawm kev kho qhov voltage thoob plaws nws.Yog li ntawd, ib qho ntawm cov yam ntxwv loj tshaj plaws ntawm lub siab tawv nti yog muab qhov chaw tsis tu ncua tam sim no.Qhov chaw tam sim no tuaj yeem ua kom ruaj khov ntawm kev tsav tsheb ntawm LED thiab tshem tawm cov flickering ntawm LED, uas yog qhov yuav tsum tau ua ua ntej rau LED zaub kom pom cov duab zoo.Qee lub hom phiaj tshwj xeeb tseem ntxiv qee qhov tshwj xeeb ua haujlwm rau cov kev xav tau ntawm kev lag luam sib txawv, xws li LED teeb pom kev ua yuam kev, kev tswj hwm tam sim no thiab kho tam sim no.
Evolution ntawm tus tsav tsheb IC:
Hauv xyoo 1990, LED zaub daim ntawv thov tau ua tiav los ntawm ib leeg thiab ob lub xim, thiab cov tsav tsheb tsis tu ncua ICs tau siv.Nyob rau hauv 1997, thawj zaug siab tsav tswj nti 9701 rau LED qhia tau tshwm sim nyob rau hauv kuv lub teb chaws, uas spanned los ntawm 16-theem greyscale mus rau 8192-theem grayscale, realizing WYSIWYG rau video.Tom qab ntawd, nyob rau hauv qhov pom ntawm LED teeb-emitting yam ntxwv, tus neeg tsav tsheb tam sim no tau dhau los ua thawj qhov kev xaiv rau cov neeg tsav tsheb puv xim LED, thiab 16-channel tsav tsheb nrog kev sib xyaw ntau dua tau hloov 8-channel tsav tsheb.Thaum xyoo 1990, cov tuam txhab xws li Toshiba hauv Nyij Pooj, Allegro thiab Ti hauv Tebchaws Meskas tau ua tiav 16-channel LED cov tsav tsheb tam sim no.Niaj hnub no, txhawm rau daws qhov teeb meem PCB thaiv ntawm cov teeb pom kev me me, qee tus tsav tsheb IC cov tuam txhab tau qhia txog kev sib xyaw ua ke ntawm 48-channel LED tas li tam sim no tsav tsheb chips.
Performance index ntawm tus tsav tsheb IC:
Ntawm cov ntsuas kev ua tau zoo ntawm LED zaub, tus nqi refresh, qib grey thiab cov duab nthuav tawm yog ib qho tseem ceeb tshaj plaws ntsuas.Qhov no yuav tsum muaj qhov sib xws ntawm tam sim no ntawm LED zaub tsav tsheb IC raws, kev sib txuas lus ceev ceev thiab cov lus teb tam sim no.Nyob rau hauv lub dhau los, tus nqi refresh, grey scale thiab kev siv piv yog ib qho kev lag luam tawm kev sib raug zoo.Txhawm rau kom ntseeg tau tias ib lossis ob qho ntawm cov ntsuas tuaj yeem ua tau zoo dua, nws yog qhov yuav tsum tau ua kom tsim nyog txi tus lej ob qhov ntsuas ntxiv.Vim li no, nws yog ib qho nyuaj rau ntau LED zaub kom muaj qhov zoo tshaj plaws ntawm ob lub ntiaj teb hauv kev siv tswv yim.Txawm hais tias tus nqi tshiab tsis txaus, thiab cov kab dub yuav tshwm sim thaum tua nrog cov cuab yeej siv lub koob yees duab ceev, lossis greyscale tsis txaus, thiab xim thiab ci ntsa iab tsis sib xws.Nrog rau kev nce qib ntawm kev siv thev naus laus zis ntawm cov neeg tsav tsheb IC cov tuam txhab, tau muaj kev cuam tshuam hauv peb qhov teeb meem siab, thiab cov teeb meem no tau raug daws.
Nyob rau hauv daim ntawv thov ntawm LED tag nrho-xim zaub, thiaj li yuav ua kom cov neeg siv lub qhov muag xis nyob rau lub sij hawm ntev, tsis tshua muaj brightness thiab siab grey tau dhau los ua tus qauv tseem ceeb rau kev ntsuam xyuas kev ua tau zoo ntawm tus tsav IC.
Post lub sij hawm: Oct-09-2022