Light-emitting diodes (LEDs) thiab ua kua dej ua kua (LCDs). Ob cov ncauj lus yog cov uas tsis tshua muaj nqi, hloov tau yooj yim, thiab yooj yim rau kev sib txuas nrog ib tus me nyuam yaus microcomputer, thiab tom kawg muaj me me tsav tam sim no, tsis muaj hwj chim noj, ntev lub neej, zoo nkauj font zoo, ntshiab zaub, loj saib lub kaum ntse ntse, hom thiab daim ntawv thov dav. Txawm li cas los xij, lub LCD nyuab dua hauv kev tswj, vim tias qhov ntsuas tus nqi nruab nrab ntawm qhov nruab nrab ntawm DC electrodes yuav tsum yog 0, yog tias tus LCD yuav tsum oxidized. Yog li no, lub LCD tsis yog yuav los tswj los ntawm ib lub teeb liab, tab sis ib theem zuj zus ntawm ib qho kev ua tau zoo siv. tswj. Lub LCD zaub muaj ob hom: qhov qub thiab sijhawm sib faib. Nws yog zoo li qub thiab yooj yim, tab sis yuav tsum muaj kab ntau ntxiv. Lub sij hawm faib yog qhov nyuaj, tab sis cov kab xav tau yog me me. Ob txoj kev no yog txiav txim los ntawm kev xaiv ntawm cov electrode ua. Kev siv cov kua siv ua kua dej ntawm lub tshuab hluav taws xob ua piv txwv, cov lus qhia ntawm lub npov yog pom nyob rau hauv (1), thiab lub sijhawm siab tawm los yog nyob rau tib lub sijhawm. Thaum lub siab siab tshwm nyob rau hauv digital 1 txog 5, lub saum toj thiab hauv qab kuj tawm los yog nyob rau tib lub sijhawm. Ob lub ntsiab lus taw qhia kuj tseem qhib los yog tawm tib lub sij hawm, thiab txoj kev tsav tsheb yog lub sij hawm faib nrog kev sib haum ntawm 1/2, thiab muaj 11 ntu electrodes thiab ob hom electrodes.
Ruaj ntseg tsim ntawm ntu code LCD tsav Circuit Court
Thib ob, cov qauv tso saib LCD
Cov tshuaj yuav muab faib ua cov roj, kua thiab cov khib nyiab. Txawm li cas los xij, cov khoom ntawm qee qhov yeeb tshuaj tsis yog nyob rau hauv peb hom. Cov dej siv lead ua kua yog ib qho ntawm lawv. Nws tsis yog ib qho ua kua lossis ib yam khoom tiav. Nws ntws zoo li cov kua thiab muaj cov khoom sib xws. Nyob hauv lub xeev ntuj, cov kua siv lead ua kua molecules raug muab tso rau hauv ib qho yeeb nkab heev Cao, thiab cov kua siv lead ua kua molecules yog npaj rau hauv cov kev taw qhia ntawm qhov zawj [3]. LCD qhia ua hauj lwm nrog cov khoom ntawm cov kua nplaum ua kua. Cov khoom siv lead ua kua yog ntxiv ntawm lub tshuab sab sauv thiab sab nraud ntawm cov duab LCD, thiab cov kua siv lead ua kua dej ua ke nyob rau hauv tib seem, thiab muaj kev sib tw ua kom pom, thiab feem ntau yog nyob rau hauv lub xeev. Thaum twg ib qho voltage yog hos nruab nrab ntawm lub siab thiab qis electrodes, cov kua siv lead ua kua molecules tau hloov mus rau txoj kev sib sib zog nqus, thiab kev kho qhov muag pom kev poob lawm. Dub [4]. Yuav kom tiv thaiv ua kua dej oxidation ua kua, nws yuav tsum muaj qhov ntsuas qhov nruab nrab ntawm qhov LCD electrodes yuav tsum tau xoom [1], yog li ntawd lub LCD tsis tau tsav los ntawm cov teeb liab, tab sis yog tsav los ntawm qee cov square wave sequence . Kev tsav tsheb nrawm nrawm yog qhov tshwj xeeb, kev siv sij hawm faib txoj kev nrog ib qho siab ntawm 1/2 ua piv txwv. Daim duab (2) qhia txog cov qauv ntawv uas yuav tsum tau ua nyob rau hauv lub ntu thiab cov electrodes rau qee cov mob hlab ntsha tawg kom tau kaj lossis tsis. Raws li tuaj yeem pom los ntawm daim duab (2), qhov kev xav ntawm B1 thiab COM2, thiaj li B1 qaim; B3 yog nyob rau tib qho kev taw qhia raws li lub waveform ntawm COM1, yog li B3 tawm [5]. (qhov chaw B1 thiab B3 sib koom ib qho SEG chaw nres nkoj nkaus xwb)
Ruaj ntseg tsim ntawm ntu code LCD tsav Circuit Court
Feem ntau, cov qauv ntawm cov chaw nres nkoj COM portform yog ib txwm tas. Rau cov qauv dynamic 1/2 sij hawm, cov waveforms ntawm COM1 thiab COM2 terminals yog inverted. Yuav kom tswj tau cov zaub thiab kev tuag ntawm txhua lub hlab ntsha tawg, tsim ib txoj kev ua rau lub cev yuav tsum raug tsim tawm ntawm cov electrode. Qhov kev paub ntawm cov lus qhia hauv qab no muaj cov yam ntxwv nram qab no: 1), raws li pom ntawm ob hom electrodes, ob qho tib si electrodes muaj peb theem, uas yog 0V, 1.5V thiab 3V feem ntau; 2), ob qho tib si electrodes COM1 thiab lub COM2 waveform yog directional; 3), lub sij hawm ntawm kev tsav lub zog ntawm cov qauv hluav taws xob thiab cov nplais txoj cai yog tib yam, nyob rau ntawm qhov ntau ntawm cov electrode hloov plaub zaug ib hlis, thiab lub tshooj code hloov ob zaug ib zaug, uas yog lub teeb liab xwm yeem. Vim tias cov kev xav ntawm kev tsav lub zog ntawm cov electrode, nyob rau hauv kev lag luam, feem ntau ntawm cov microcontroller thiab cov software siv coj los siv ua tus tsav cov qauv ntawm cov electrode, thiab tsim cov ASIC, yog hais tias cov qauv saum toj no saws, nws yuav siv sij hawm li ib thaj tsam loj thiab nce tus nqi. Yog li no, qhov tsab xov xwm no yuav qhia ib lub tswv yim ntawm digital thiab analog ua ib hom tsav tsheb LCD.
Thib peb, LCD cov duab teeb tsa tsav tsheb
1. COM1 thiab COM2 waveform cim circuits
Cov ntsiab lus tsim: Raws li tau piav qhia hauv Daim Phiaj Pom Piav Qhia, lub waveforms ntawm ob qho cov electrodes yog tsau. Muaj peb theem, 0V, 1.5V, 3V, thiab txhua lub voj voog hloov 4 zaug. Tus waveforms ntawm COM1 thiab COM2 yog taw qhia. Daim duab (3) qhia txog kev daws teeb meem. Lub voj voog muaj ib qho Transmission NMOS thiab lub rooj tswj hwm ntawm 3-xeev. Tus zaus ntawm DA yog ob zaug ntawm d3, qhov twg NMOS transistor txuas nrog 1.5V thiab lub rooj vag 3-xeev yog siv nrog 3V. Txhua lub voj voog hloov 4 lub sij hawm thiab muaj 3 theem ntawm cov qauv siv hluav taws xob ntau. Yuav kom pom los ntawm tib neeg lub qhov muag, lub zaus ntawm d3 yog 10Hz, thiab HSPICE nthwv dej uas tau tsim los ntawm Daim Ntawv Cuam Tshuam no nyob hauv daim duab (3-1) (powered 1.5V zog mov, 3V voltage yog generated by peripheral voltage doubler Circuit Court). Ua kom tiav cov kev cai lij choj, hauv daim duab (3), W / L ntawm N-tube yog 28uM / 4uM, W / L ntawm ob lub P-tub ntawm lub rooj vag 3-xeev yog 8uM / 3uM, thiab W / L ntawm ob lub N-leeg yog 4uM. / 3uM.
Ruaj ntseg tsim ntawm ntu code LCD tsav Circuit Court
Ruaj ntseg tsim ntawm ntu code LCD tsav Circuit Court
2. SEG chaw nres nkoj lub voj voog thiab cov qauv ntaub ntawv
Cov ntsiab lus ntse: 11 lub voj voos thiab 2 lub tshuab electrodes tsom xam cov khoom siv hauv tshuab hluav taws xob, thiab lub voj voog thiab cov electrode ntu yuav tsum nyob li qub. Txoj kev daws teeb meem yog tshwm sim hauv daim duab (4). Daim duab (4) yog lub voj voog tsav tsheb khiav. Nws yog tsim los ntawm ib lub rooj vag XOR thiab lub rooj vag TSIS TSIS. Yuav kom khaws tau cov khoom hluav taws xob thiab lub caij ntu kom zoo ib yam, cov teeb meem tawm tswv yim d3 Thiab d3 hauv COM circuit yog tib lub teeb liab, uas yog ib lub sij hawm ntev xwm yeem nrog 10Hz; qhov teeb meem ntawm D1 yog tsim los ntawm qhov kev teeb tsa los ntawm kev daws teeb meem, uas yog txiav txim siab rau cov lus cim hauv tshuab hluav taws xob, thiab qhov tshwm sim tau tshwm sim yog peb hom, Qib siab 1, qhov theem 0, periodic square nthwv dej (qhov zaus yog ob zaug d3, lub sij hawm yog 1/2), daim duab (4-1), daim duab (4-2), daim duab (4-3)) yog cov qauv ntawm generated verilog_xl los mus rau saum toj no. Qhov chaw nres nkoj SEG yog pib nrog ib qho digital Circuit Court, thiab tsis muaj qhov yuav tsum tau ua rau qhov loj ntawm lub transistor.
Suav ua lub tsev qiv ntawv kua siv lead ua kua
Nws tuaj yeem pom los ntawm simulation waveforms ntawm tus qauv hluav taws xob thiab lub vas sab electrode uas qhov tsim tsim hluav taws xob ua raws li cov cai ntawm cov khoom siv ua kua dej ua qauv, qhov pom ntawm electrode hloov plaub zaug ib hlis twg thiab peb theem sib txawv, thiab lub sij hawm ntawm qhov ntau electrode thiab lub electrode ntu yuav khaws cia zoo ib yam. Ua kom lub stroke tsis tshua zoo los yog tsis, qhov sib tw (SEG) thiab (COM) cov chaw nres nkoj yuav tsum txaus siab rau txoj kev sib raug zoo. Cov kev sib raug zoo yog raws li qhia hauv qab rooj nram qab no: Thaum SEG chaw nres nkoj thiab lub chaw nres nkoj ntawm COM1 yog thawb, qhov sib ze ntawm lub ntsej muag yog tsis tshua muaj siab. Thaum nyob rau hauv theem, qhov sib ze tsim yog tsis tshua muaj neeg tua.
