LED zaub tsav tsheb cov khoom lag luam feem ntau suav nrog kab scan tsav tsheb chips thiab kem tsav tsheb chips, thiab lawv daim ntawv thov teb yog feem ntausab nraum zoov advertising LED cov ntxaij vab tshaus,sab hauv tsev LED zaub thiab tsheb npav nres LED zaub. Los ntawm kev pom ntawm hom zaub, nws npog monochrome LED zaub, dual xim LED zaub thiab puv xim LED zaub.
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 yam 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 cov zaub coj thiab txiav txim siab cov txiaj ntsig nws nthuav tawm.
LED tsav chips tuaj yeem muab faib ua cov khoom siv dav dav thiab cov khoom siv tshwj xeeb.
Ib lub hom phiaj dav dav, lub nti nws tus kheej tsis yog tsim tshwj xeeb rau LEDs, tab sis qee qhov logic chips (xws li serial 2-parallel shift registers) nrog qee qhov kev ua haujlwm ntawm kev coj ua.
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 of driver ICs
Nyob rau xyoo 1990, LED zaub daim ntawv thov tau ua tiav los ntawm ib leeg thiab ob lub xim, thiab kev siv hluav taws xob tsis tu ncua ICs tau siv. Xyoo 1997, kuv lub teb chaws tau tshwm sim thawj zaug tsav tsheb tswj nti 9701 rau LED zaub, uas tau nthuav tawm los ntawm 16-theem greyscale mus rau 8192-theem greyscale, paub txog 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 ntawm PCB thaiv ntawmme me pitch LED zaub, qee tus neeg tsav tsheb IC cov tuam txhab tau qhia txog kev sib koom ua ke 48-channel LED tas li tsav tsheb tam sim no.
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 qhia 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 qhov kev hloov tshiab tsis txaus, thiab cov kab dub yog nquag tshwm sim hauv cov cuab yeej siv lub koob yees duab ceev, lossis qhov greyscale tsis txaus, thiab xim thiab qhov ci 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. Tam sim no, feem ntau ntawm SRYLED LED cov lus qhia muaj siab refresh npaum li cas nrog 3840Hz, thiab tsis muaj kab dub yuav tshwm sim thaum thaij duab nrog cov khoom siv koob yees duab.
Trends in driver ICs
1. Kev txuag hluav taws xob. Kev txuag hluav taws xob yog kev nrhiav mus ib txhis ntawm LED zaub, thiab nws kuj yog qhov tseem ceeb rau kev txiav txim siab kev ua haujlwm ntawm tus tsav IC. Kev txuag hluav taws xob ntawm tus tsav tsheb IC feem ntau suav nrog ob yam. Ib qho yog kom txo tau qhov tam sim no inflection point voltage, yog li txo cov tsoos 5V fais fab mov kom khiav lag luam hauv qab 3.8V; lwm qhov yog los txo cov kev khiav hauj lwm voltage thiab kev khiav hauj lwm tam sim no ntawm tus tsav tsheb IC los ntawm optimizing IC algorithm thiab tsim. Tam sim no, qee lub tuam txhab tau tshaj tawm cov tsav tsheb tam sim no IC nrog qhov tsis tshua muaj hluav taws xob tig ntawm 0.2V, uas txhim kho LED siv tus nqi ntau dua 15%. Lub zog hluav taws xob hluav taws xob yog 16% qis dua li cov khoom lag luam ib txwm siv los txo cov hluav taws xob tsim hluav taws xob, kom lub zog ua haujlwm ntawm LED cov lus qhia tau zoo heev.
2. Kev sib koom ua ke. Nrog rau qhov poob sai ntawm pixel suab ntawm LED zaub, cov khoom siv ntim khoom yuav tsum tau muab tso rau ntawm ib cheeb tsam ntawm chav tsev nce los ntawm geometric multiples, uas ua rau kom cov khoom ntom ntom ntawm cov tsav tsheb ntawm lub module. NojP1.9 me me suab LED Screen Piv txwv li, 15-scan 160 * 90 module yuav tsum muaj 180 tus tsav tsheb tam sim no ICs, 45 kab raj, thiab 2 138s. Nrog rau ntau yam khoom siv, qhov chaw xaim muaj nyob ntawm PCB dhau los ua neeg coob heev, ua rau muaj teeb meem ntawm kev tsim hluav taws xob. Nyob rau tib lub sijhawm, xws li kev sib koom ua ke ntawm cov khoom siv tau yooj yim ua rau muaj teeb meem xws li cov khoom siv tsis zoo, thiab tseem txo qhov kev ntseeg siab ntawm cov module. Tsawg tus neeg tsav tsheb ICs tau siv, thiab PCB muaj thaj tsam loj dua. Qhov kev thov los ntawm daim ntawv thov sab yuam tus tsav tsheb IC kom pib ntawm txoj kev sib koom ua ke.
Tam sim no, cov neeg tsav tsheb tseem ceeb IC cov neeg muag khoom hauv kev lag luam tau ua tiav kev sib koom ua ke 48-channel LED tas li tam sim no tsav ICs, uas sib txuas cov kab hluav taws xob loj rau hauv cov tsav tsheb IC wafer, uas tuaj yeem txo qhov nyuaj ntawm daim ntawv thov-sab PCB Circuit Board tsim . Nws kuj zam cov teeb meem tshwm sim los ntawm kev tsim muaj peev xwm lossis tsim kev sib txawv ntawm cov engineers los ntawm ntau lub tuam txhab.
Post lub sij hawm: Mar-03-2022
