Alaabta dareewalka soo bandhigta ee LED-ka waxaa ka mid ah chips darawalka iskaanka safafka ah iyo chips darawalka tiirarka, iyo goobahooda codsiga inta badanbannaanka xayaysiisyada muraayadaha LED,bandhigyada LED-ka gudaha iyo joogsiga baska ee LED. Marka loo eego nooca bandhigga, waxay dabooshaa muraayadda monochrome LED, muraayad laba midab ah oo LED ah iyo bandhig midab buuxa ah.
Shaqada LED-ga bandhigga midabka buuxa, shaqada darawalka IC waa inuu helo xogta bandhigga (kaarka helitaanka ama processor-ka fiidiyowga iyo ilaha kale ee macluumaadka) ee u hoggaansamaya nidaamka, gudaha soo saara PWM iyo isbeddelada wakhtiga hadda, iyo dib u cusboonaysii soosaarka iyo dhalaalka cawl iyo qulqulka PWM ee kale ee la xidhiidha si loo iftiimiyo LED-yada. Qalabka IC ee ku wareegsan oo ka kooban darawalka IC, macquulka IC iyo furaha MOS waxay si wada jir ah u dhaqmaan shaqada bandhiga ee muraayadda waxayna go'aamisaa saameynta bandhigga ee ay soo bandhigto.
Chips-dareewalka LED-ka waxaa loo qaybin karaa jajabyo ujeedo guud ah iyo chips ujeedo gaar ah.
Chip-ujeedo guud, chip-ka laftiisa si gaar ah looguma talagelin LED-yada, laakiin qaar ka mid ah chips-ka macquulka ah (sida diiwaannada wareegyada 2-bar-bar-bar-bar-dhigga ah) oo leh qaar ka mid ah shaqooyinka macquulka ah ee bandhigga.
Chip-ka gaarka ah waxaa loola jeedaa chip-ka darawalka ee si gaar ah loogu talagalay bandhigga LED-ka iyadoo loo eegayo sifooyinka iftiinka LED-ka. LED waa aalad sifo ah oo hadda jirta, taas oo ah, iyada oo la adeegsanayo saturation conduction, dhalaalkeedu wuxuu isbeddelaa isbeddelka hadda, halkii uu hagaajin lahaa korantada dhexdeeda. Sidaa darteed, mid ka mid ah sifooyinka ugu weyn ee chip go'an waa in ay bixiyaan ilo joogto ah hadda. Isha joogtada ah ee hadda jirta waxay xaqiijin kartaa wadista xasilloonida LED-ka waxayna baabi'in kartaa qulqulka LED-ka, taas oo ah shardi u ah bandhigga LED-ka si loo muujiyo sawirro tayo sare leh. Qaar ka mid ah chips-ujeedada gaarka ah waxay sidoo kale ku daraan qaar ka mid ah shaqooyinka gaarka ah ee shuruudaha warshadaha kala duwan, sida ogaanshaha qaladka LED, xakamaynta faa'iidada hadda iyo sixitaanka hadda.
Horumarka darawalka ICs
Sanadihii 1990-meeyadii, codsiyada soo bandhigida LED-ka waxaa u badnaa midabo kaliya iyo laba-midab, iyo darawal koronto joogto ah ICs ayaa la isticmaalay. Sannadkii 1997-kii, dalkaygu wuxuu soo muuqday chip-kii ugu horreeyay ee kantaroolka wadista 9701 ee loogu talagalay soo bandhigida LED, kaas oo ka soo baxay 16-heer cawl ilaa 8192-heer cawl, garashada WYSIWYG ee muuqaalka. Intaa ka dib, marka la eego sifooyinka iftiinka LED-ka, darawalka joogtada ah ee hadda jira wuxuu noqday doorashada koowaad ee darawalka bandhiga LED-ga oo buuxa, darawalka 16-channel ee leh isdhexgalka sare wuxuu bedelay darawalka 8-channel. Dabayaaqadii 1990-aadkii, shirkadaha sida Toshiba ee Japan, Allegro iyo Ti ee Maraykanka ayaa si isdaba joog ah u bilaabay 16-channel LED chips darawallada joogtada ah. Maalmahan, si loo xalliyo dhibaatada fiilooyinka PCB eemuraayadaha yar yar ee LED, Qaar ka mid ah soosaarayaasha darawalada IC waxay soo bandhigeen 48-channel LED chips darawal joogto ah oo isku dhafan.
Tilmaamayaasha waxqabadka darawalka IC
Waxaa ka mid ah tilmaamayaasha waxqabadka ee bandhiga LED, heerka soo kicinta, heerka cawl iyo muujinta muuqaalka ayaa ah mid ka mid ah tilmaamayaasha ugu muhiimsan. Tani waxay u baahan tahay joogtaynta sare ee hadda udhaxeysa bandhiga LED-ka IC kanaalada, heerka isgaadhsiinta xawaaraha sare iyo xawaaraha jawaabta joogtada ah ee hadda jira. Waagii hore, heerka dib u cusboonaysiinta, miisaanka cawl iyo saamiga ka faa'iidaysigu waxay ahaayeen xidhiidh ganacsi. Si loo hubiyo in hal ama laba ka mid ah tilmaamayaasha ay ka fiicnaan karaan, waxaa lagama maarmaan ah in si habboon loo huro labada tilmaame ee soo hadhay. Sababtan awgeed, way ku adag tahay bandhigyo badan oo LED ah inay haystaan ugu wanaagsan labada adduun ee codsiyada la taaban karo. Ama heerka cusboonaysiinta kuma filna, iyo khadadka madow waxay u nugul yihiin inay ka soo muuqdaan qalabka kamaradaha xawaaraha sare leh, ama cabbirka cawlku kuma filna, midabka iyo dhalaalkuna waa kuwo iswaafaqaya. Horumarka tignoolajiyada ee soosaarayaasha darawalka IC, waxaa jiray horumarro laga gaaray seddexda mushkiladood ee ugu sarreeya, dhibaatooyinkaasna waa la xalliyay. Waqtigan xaadirka ah, inta badan bandhigyada LED-ka ee SRYLED waxay leeyihiin heerar qaboojin oo sarreeya oo leh 3840Hz, mana jiraan khad madow oo soo bixi doona marka la sawiro qalabka kamarada.
Isbeddellada ku jira darawalka ICs
1. Badbaadinta tamarta. Badbaadinta tamarta waa raadinta weligeed ah ee bandhigga LED, sidoo kale waa shuruud muhiim u ah tixgelinta waxqabadka darawalka IC. Badbaadinta tamarta darawalka IC inta badan waxaa ku jira laba dhinac. Mid waa in si wax ku ool ah loo yareeyo korantada barta is-rog-rogista ee joogtada ah, taaso hoos u dhigaysa tamarta 5V ee dhaqanka si ay uga hoos shaqeyso 3.8V; Midda kale waa in la dhimo awoodda hawlgalka iyo hawlgalka hadda ee darawalka IC iyada oo la wanaajinayo algorithm IC iyo naqshadeynta. Waqtigan xaadirka ah, qaar ka mid ah wax-soo-saareyaasha ayaa bilaabay darawalka joogtada ah ee IC oo leh danab-rogid hooseeya oo ah 0.2V, kaas oo hagaajinaya heerka isticmaalka LED in ka badan 15%. Korontada sahayda korantada ayaa 16% ka hooseysa ta alaabada caadiga ah si loo dhimo kuleyliyaha, si waxtarka tamarta ee bandhigyada LED si weyn loo wanaajiyo.
2. Is-dhexgalka. Iyada oo hoos u dhaca degdega ah ee garoonka pixel ee bandhigga LED, aaladaha baakadaysan ee lagu dhejinayo aagga halbeegga waxay kordhiyaan dhufashada joomatari, taas oo si weyn u kordhinaysa cufnaanta qaybta dusha sare ee wadista moduleka. QaadashadaP1.9 muraayad yar oo LED ah Tusaale ahaan, 15-scan 160*90 module wuxuu u baahan yahay 180 darawalka joogtada ah ee ICs, 45 tube line, iyo 2 138s. Qalab aad u badan, booska fiilooyinka ee la heli karo ee PCB-ga ayaa noqda mid aad u camiran, taas oo kordhinaysa dhibka naqshadaynta wareegga. Isla mar ahaantaana, sida habaynta ciriiriga ah ee qaybaha waxay si fudud u keeni kartaa dhibaatooyinka sida alxanka liidata, iyo sidoo kale yaraynta kalsoonida moduleka. Darawalka IC-yada in ka yar ayaa la isticmaalaa, PCB-guna waxa uu leeyahay aag fiilooyin oo weyn. Baahida dhanka dalabka ayaa ku qasbeysa dareewalka IC in uu bilaabo dariiq farsamo oo isku dhafan.
Waqtigan xaadirka ah, alaab-qeybiyeyaasha caadiga ah ee darawalka IC ee warshadaha ayaa si isdaba-joog ah u bilaabay 48-channel LED darawal joogto ah oo joogto ah ICs, kaas oo ku daraya wareegyo ballaaran oo wareeg ah darawalka IC wafer, kaas oo yareyn kara kakanaanta codsiga-dhinaca PCB naqshadeynta guddiga wareegga wareegga. . Waxa kale oo ay ka fogaataa dhibaatooyinka ay keenaan awoodaha naqshadaynta ama kala duwanaanshaha naqshadaynta injineerada ka soo saarayaasha kala duwan.
Waqtiga boostada: Mar-03-2022
