LED zaub screen muaj plaub qhov loj: lub computer tswj ib feem, tso saib tsav matrix, coj zaub array, thiab fais fab mov. Ntawm lawv, muaj ntau yam teeb meem:
1. Interface teeb meem. Phenomenon: Cov ntaub ntawv hauv computer tsis tuaj yeem tso tawm, kos lub cable
2. Fais fab mov teeb meem. LED zaub siv cov khoom siv hluav taws xob tsawg thiab cov khoom siv hluav taws xob siab tam sim no, uas tsis txawv ntau ntawm cov khoom siv hluav taws xob DC zoo tib yam.
3. Tsav teeb meem. Yog tias tsis muaj cov zaub nyob rau hauv txhua kab lossis kab, nws yog qhov teeb meem sib txuas ntawm tsav (chip), hloov nws.
4. Zaub teeb meem. Kev siv lub sij hawm ntev ntawm lub vijtsam LED yuav raug puas tsuaj thiab kev laus, tsuas yog kho thiab hloov nws.
LED zaub cov txheej txheem kev ua txhaum cai-kev kuaj mob txheej txheem:
1. Txiav txim seb koj cov zaub yog cov zaub synchronous lossis cov zaub asynchronous; cov zaub ntawm cov zaub synchronous nyob ntawm qhov chaw ntawm cov zaub, thiab cov zaub asynchronous tsis nyob ntawm qhov chaw ntawm cov zaub;
2, txiav txim siab seb koj cov zaub yog ib feem ntawm cov zaub teeb meem lossis tag nrho lub vijtsam muaj teeb meem;
Ib feem ntawm cov zaub abnormality tuaj yeem tshem tawm cov teeb meem kev sib txuas lus. Feem ntau, nws tuaj yeem txiav txim siab tias cov khoom siv kho vajtse ua haujlwm tsis zoo. Koj yuav tsum tiv tauj peb tam sim ntawd txhawm rau tiv thaiv qhov ua tsis tiav ntawm kev nthuav dav;
Muaj ntau ntau qhov laj thawj rau qhov txawv txav ntawm lub vijtsam tag nrho:
Rau lub synchronous zaub, koj yuav tsum paub meej tias seb qhov chaw ntawm cov zaub tau hloov, seb qhov kev sib txuas lus zoo li cas, seb qhov kev sib kis zoo li cas, thiab tom qab ntawd seb qhov kev txais tos zoo li cas;
Rau cov ntxaij vab tshaus asynchronous, thawj zaug paub meej tias qhov tsis zoo ntawm lub vijtsam zaub: qhov chaw nyob kho vajtse, qhov dav, qhov siab, IP raug hloov, yog tias qhov ntsuas tsis raug, tom qab ntawd sim seb qhov kev sib txuas lus zoo li cas, thiab thaum kawg paub meej tias qhov kev tswj cov zaub yog qhov qub lossis lub interface ntawm cov zaub unit board.
Lub vijtsam zaub yog tsim los ntawm cov khoom vaj huam sib luag ntawm ib qho los ntawm ib qho, thiab cov teeb liab kis tau los ntawm lub tiaj tus cable.
kev qhia:
GND=av (GND) L=latch (LAT lossis ST) S=moos (Clk) OE=pab (/OE)
R=cov ntaub ntawv liab G=cov ntaub ntawv ntsuab U=cov ntaub ntawv xiav ABCD= kab teeb liab H= txiav tawm kab teeb liab N=floating V{ {6}}VCC) kev hloov pauv
Txhawm rau txuag cov neeg siv khoom peev, peb tuaj yeem muab cov neeg siv khoom nrog cov kev pabcuam xws li kev kho dua tshiab thiab rov ua dua tshiab ntawm lawv cov khoom siv LED uas twb muaj lawm. Raws li qhov xwm txheej ntawm tus neeg siv khoom lub vijtsam, nws tuaj yeem muab faib ua peb hom hauv qab no:
1. Tib lub npov pawg thawj coj saib interface
Ntau tus neeg tsim khoom lag luam tso saib chav tsev board interfaces tsis yog tus qauv. Yog hais tias tus neeg siv khoom lub rooj sib tham lub rooj sib tham yog tib yam li cov interface hais los saum toj no, peb tuaj yeem hloov kho qhov system, xws li cov ntawv nyeem video screen, qis grey scale video screen, thiab siab grey scale video screen. Txoj kev no muaj tus nqi qis, Cov nyhuv yog ceev.
2. Display unit board interface
Yog hais tias tus neeg siv khoom siv lub rooj tsavxwm interface tsis zoo ib yam li tus qauv interface tau teev tseg saum toj no, tab sis tus naj npawb thiab hom teeb liab yog tib yam, cov khoom siv no kuj tuaj yeem hloov kho dua tshiab, thiab tus nqi yog me ntsis siab dua thawj rooj plaub.
3. Ua tiav cov zaub vaj huam sib luag pawg thawj coj saib sib txawv
Tus neeg siv khoom tus thawj coj zaub vaj huam sib luag interface tsis zoo ib yam li cov tau hais los saum no. Nyob rau hauv rooj plaub no, tus nqi ntawm kev hloov pauv yog qhov loj heev. Tsuas yog LED module thiab qee qhov ICs, tag nrho lwm qhov chaw, xws li PCB boards thiab Ito systems, yuav tsum tau hloov, uas yog kim heev.
1. Kho ntawm lub rooj tsavxwm tso saib Cov zaub vaj huam sib luag tsis teeb. Yog vim li cas: tej zaum yuav tsis muaj fais fab mov, 74HC245 input interface yog tawg, thiab E teeb liab yog luv luv mus rau theem siab. Ib kab ntawm cov zaub vaj huam sib luag yog ib txwm nyob. Ua rau: Lub decoder, 74HC245, 74HC138 tawg. Ib kab ntawm cov zaub vaj huam sib luag tsis teeb. Yog vim li cas: 4953, 74HC38 puas lawm los yog kev sib txuas ntawm tus pin thiab lub hwj chim raj raug txiav. Ib kem ntawm cov zaub vaj huam sib luag tsis teeb. Yog vim li cas: Ib tug pin ntawm tus tsav tsheb IC los yog resistor yog soldered los yog lub Circuit Court yog disconnected. Ib kab lossis kab ntawm lub module tsis teeb. Qhov laj thawj: LED module pins yog soldered. 2. Synchronous video system Tig lub computer, lub vijtsam zaub tsis muaj lus teb. Yog vim li cas: Cov kab kev sib txuas lus tsis raug (xws li kev sib txuas tsis zoo). Qhib lub computer, lub vijtsam npo flickers, tab sis tsis muaj teeb liab. Yog vim li cas: Tus tsav tsheb software LEDSETUP tsis pib. Qhov kev tshuaj ntsuam yog tso tawm ib txwm, tab sis qhov puv npo yog flickering. Ua rau: Cov kab kev sib txuas lus, daim npav xa thiab daim npav txais lossis daim npav txais yog qhov tsis raug. Cov xim ntawm cov zaub yog txawv txav. Ua rau: Muaj teeb meem nrog kev teeb tsa hom zaub. Ib feem ntawm cov zaub yog txawv txav. Yog vim li cas: Kos lub rooj sib tham scanning. Tej zaum yuav tsis muaj hluav taws xob lossis kev sib cuag tsis zoo. 3. Asynchronous text screen system Tsis muaj zaub thaum booting. Ua rau: Lub rooj tswj xyuas lub ntsiab yuav tsis muaj hwj chim lossis qhov hluav taws xob tsawg dhau. Cov ntsiab lus qub tau tshwm sim thaum booting, tab sis kev sib txuas lus tsis ua haujlwm. Yog vim li cas: Cov kab kev sib txuas lus yog qhov txawv txav, kev xaim tsis raug, kev sib txuas lus interface nti 232 tawg, lossis lub khoos phis tawj kev sib txuas lus tau tawg. Cov ntsiab lus ploj lawm. Yog vim li cas: Lub roj teeb 3.6V tsis muaj hluav taws xob. Cov saum toj no yog qhov ua txhaum ntau, thiab cov neeg siv khoom feem ntau tuaj yeem daws tau los ntawm lawv tus kheej. Yog tias muaj qhov teeb meem nyuaj, thov hu rau peb, peb yuav teb txhua lub sijhawm thiab muab kev pabcuam zoo tshaj plaws rau koj. Kev nkag siab txog cov cim qhia ntawm LED zaub CLK moos teeb liab: Kev hloov pauv mem tes muab rau lub npe hloov pauv, txhua tus mem tes yuav ua rau cov ntaub ntawv hloov pauv hauv lossis tawm ntawm ib qho me ntsis. Cov ntaub ntawv ntawm cov ntaub ntawv chaw nres nkoj yuav tsum tau ua haujlwm nrog lub moos teeb liab kom xa cov ntaub ntawv ib txwm, thiab qhov zaus ntawm cov ntaub ntawv teeb liab yuav tsum yog 1/2 npaug ntawm zaus ntawm lub moos teeb liab. Txawm li cas los xij, thaum lub sijhawm teeb tsa lub moos yog qhov txawv txav, nws yuav ua rau tag nrho pawg thawj coj saib tsis meej. STB latch teeb liab: Xa cov ntaub ntawv hauv kev hloov pauv mus rau lub latch, thiab tso saib cov ntaub ntawv cov ntsiab lus los ntawm lub voj voog tsav kom teeb lub LED. Tab sis vim hais tias lub voj voog tsav yog tswj los ntawm EN enables teeb liab, qhov yuav tsum tau ua ua ntej rau nws lub teeb pom kev zoo yuav tsum yog qhov qhib qhib. Lub teeb liab latch tseem yuav tsum tau ua haujlwm nrog lub moos teeb liab kom pom cov duab tiav. Txawm li cas los xij, thaum muaj qhov txawv txav ntawm lub teeb liab latched, tag nrho lub rooj tsavxwm yuav tshwm sim nyob rau hauv ib qho kev tsis sib haum xeeb. EN pab cov teeb liab: tag nrho lub vijtsam ci ntsa iab tswj teeb liab, kuj siv rau kev tshuaj ntsuam blanking. Tsuas yog kho nws lub voj voog ua haujlwm kom tswj tau qhov kev hloov ntawm qhov ci. Thaum lub teeb liab qhib qhov txawv txav, tag nrho lub vijtsam yuav tshwm sim tsaus, tsaus, lossis tailing. Cov ntaub ntawv teeb liab: Muab cov ntaub ntawv xav tau los tso saib cov duab. Nws yuav tsum tau koom tes nrog lub moos teeb liab kom xa cov ntaub ntawv mus rau txhua qhov chaw pom. Feem ntau, cov ntaub ntawv liab, ntsuab thiab xiav yog sib cais nyob rau hauv cov zaub screen. Yog tias cov ntaub ntawv teeb liab luv luv mus rau qhov zoo lossis qhov tsis zoo , cov xim sib xws yuav tshwm sim ci ntsa iab lossis tsis ci. Thaum cov ntaub ntawv teeb liab raug tshem tawm, cov xim sib xws tsis paub meej. ABCD kab teeb liab: Nws tsuas tshwm sim thaum lub sij hawm dynamic scan zaub. ABCD yeej yog tus lej binary, thiab A yog qhov qis tshaj me ntsis. Yog hais tias lub teeb liab ABCD qhia nyob rau hauv binary, qhov siab tshaj plaws tswj ntau yam yog 16 kab (1111), thiab tsuas yog AB teeb liab yuav tsum tau nyob rau hauv 1/4 scan. , Vim tias AB teeb liab ntau yog 4 kab (11). Thaum txoj kab tswj cov teeb liab yog qhov txawv txav, yuav muaj qhov tshwm sim xws li tso saib misalignment, highlighting lossis duab sib tshooj. Cov txheej txheem daws teeb meem (cov cuab yeej: multimeter, soldering hlau, hniav, ntswj ntsia hlau, tweezers ... thiab lwm yam) * Thaum txiav txim qhov teeb meem, lawv yuav tsum tau daws nrog hauv thawj thiab theem nrab. Qhov tseeb thiab loj yuav tsum tau daws ua ntej, thiab cov teeb meem me yuav tsum tau daws tom qab. Short circuit yuav tsum yog qhov tseem ceeb tshaj plaws. 1. Resistance detection method, kho lub multimeter mus rau qhov kev tiv thaiv ntau yam, kuaj xyuas tus nqi kuj ntawm ib qho taw tes ntawm lub rooj tsavxwm ib txwm muaj, thiab tom qab ntawd kuaj xyuas tib lub ntsiab lus ntawm lwm lub rooj tsav xwm tib yam los kuaj seb tus nqi kuj txawv ntawm qhov qub. tsis kam. Yog tias lawv txawv, ces nws tau lees paub. Scope ntawm lo lus nug. 2. Kev ntsuas qhov ntsuas hluav taws xob, kho lub multimeter mus rau qhov ntsuas qhov ntsuas hluav taws xob, kuaj xyuas qhov hluav taws xob mus rau hauv av ntawm ib qho chaw ntawm qhov xav tau ntawm Circuit Court, thiab sib piv seb nws puas zoo ib yam li tus nqi ib txwm muaj, txwv tsis pub muaj qhov teeb meem ntawm qhov teeb meem. 3. Txoj kev tshawb xyuas luv luv. Teem lub multimeter mus rau lub luv-circuit detection iav (qee qhov yog diode voltage poob zog los yog tsis kam iav, feem ntau muaj lub tswb muaj nuj nqi), thiab xyuas seb puas muaj qhov tshwm sim luv luv. Yog tias pom lub voj voog luv luv, nws yuav tsum tau daws ua ntej kom tsis txhob hlawv lwm yam khoom siv. Txoj kev no yuav tsum tau ua thaum lub tshuab hluav taws xob raug kaw kom tsis txhob muaj kev puas tsuaj rau lub 'meter'. 4. Txoj kev ntsuas hluav taws xob poob qis, kho cov multimeter mus rau diode voltage nco cov iav, vim tias tag nrho cov ICs yog tsim los ntawm ntau yam yooj yim tib yam, tab sis yog miniaturized, yog li thaum muaj ib tug tam sim no dhau los ntawm ib tug pin ntawm nws, yuav muaj ib tug. voltage poob hla tus pin. Feem ntau, qhov hluav taws xob poob ntawm tib tus pin ntawm tib hom IC zoo ib yam. Raws li qhov voltage poob tus nqi ntawm tus pin, nws yog ib qho tsim nyog yuav tsum tau ua haujlwm nrog lub zog hluav taws xob tawm. Txoj kev no muaj qee yam kev txwv. Piv txwv li, yog tias cov cuab yeej kuaj tau siab heev, nws tsis tuaj yeem kuaj pom. A. Tag nrho lub rooj tsavxwm tsis ci 1. Xyuas seb lub hwj huam mov puas txuas nrog lub teeb liab kab. 2. Xyuas seb daim npav xeem puas paub qhov cuam tshuam. Yog tias lub teeb liab ntawm daim npav xeem flashes, tsis muaj kev lees paub. Xyuas seb lub teeb lub rooj tsavxwm thiab daim npav xeem puas muaj tib lub zog hauv av, lossis lub teeb board interface muaj lub teeb liab thiab hauv av luv luv, uas ua rau lub interface tsis paub. (Smart Test Card) 3. Txheeb xyuas seb 74HC245 puas yog luv luv nrog kev sib koom ua ke, thiab seb qhov sib txuas (EN) cov teeb liab tawm tswv yim thiab cov zis pins ntawm 245 puas yog soldered lossis luv luv rau lwm cov circuits. coj zaub Nco tseg: Feem ntau xyuas cov khoom siv hluav taws xob thiab ua kom (EN) teeb liab. B. Thaum luam theej duab cov dots obliquely, cov kab sib txuas tsis tu ncua tsis ci thiab qhov screen sib tshooj 1. Txheeb xyuas seb puas muaj kev cuam tshuam, vuam virtual, lossis luv luv ntawm A, B, C, thiab D teeb liab input ports rau 245. 2. Tshawb xyuas seb qhov A, B, C, thiab D cov khoom siv hluav taws xob sib raug rau 245 yog qhib, soldered, los yog luv luv ntawm cov zis terminals 138. 2. 3. Xyuas seb cov teeb liab A, B, C, thiab D puas luv luv los yog lub teeb liab luv luv rau hauv av. Lus Cim: Feem ntau pom ABCD kab teeb liab. C. Ib lossis ob peb kab tsis ci thaum nws tag nrho rau 1. Xyuas seb lub Circuit Court ntawm 138 thiab 4953 yog qhib, soldered, los yog luv-circuited. D. Thaum lub sij hawm scanning kab, ob los yog ob peb kab (feem ntau yog ib tug ntau yam ntawm 2, tsis tu ncua) yog lit tib lub sij hawm 1. Xyuas seb cov cim ntawm A, B, C, thiab D puas yog luv luv. 2. Xyuas seb lub 4953 output davhlau ya nyob twg yog luv-circuited nrog rau lwm cov zis terminals. E. Ib qho taw qhia lossis ntau lub ntsiab lus (tsis xwm yeem) tsis teeb thaum tag nrho rau 1. Nrhiav tus pin tswj tus pin ntawm lub module thiab ntsuas seb nws puas yog luv luv nrog cov kab no. 2. Hloov lub module lossis ib lub teeb. F. Ib lossis ntau kab tsis kaj thaum tag nrho rau 1. Nrhiav tus pin uas tswj cov kem ntawm lub module, thiab kuaj seb nws puas txuas nrog cov zis davhlau ya nyob twg ntawm tus tsav tsheb IC (74HC595/MBI5124,,,). G. Muaj ib qho taw tes lossis ib kab lus qhia, lossis tag nrho cov kab yog qhov tseem ceeb, thiab nws tsis tswj 1. Txheeb xyuas seb lub kem puas luv luv nrog lub zog hauv av. 2, xyuas seb cov kab yog luv luv nrog cov ncej zoo ntawm cov khoom siv hluav taws xob. 3. Hloov nws tus tsav tsheb IC. H. Cov zaub yog chaotic, tab sis cov teeb liab tso tawm rau lub rooj tsavxwm tom ntej yog qhov qub 1. Tshawb xyuas seb lub STB latch output davhlau ya nyob twg sib raug rau 245 txuas nrog lub latch davhlau ya nyob twg ntawm tsav IC lossis lub teeb liab luv luv rau lwm cov kab. I. Cov zaub yog chaotic thiab cov zis yog txawv txav 1. Xyuas seb lub teeb liab STB latched los ntawm lub moos CLK yog luv luv. 2. Txheeb xyuas seb lub moos CLK ntawm 245 puas muaj kev tawm tswv yim thiab tso tawm. 3. Xyuas seb lub moos teeb liab puas luv luv mus rau lwm cov kab. Nco tseg: Feem ntau kuaj xyuas lub moos thiab lub ntsuas phoo. J. Zaub tsis muaj xim 1. Xyuas seb puas muaj cov tswv yim thiab tso tawm ntawm cov ntaub ntawv davhlau ya nyob twg ntawm cov xim 245. 2. Xyuas seb cov ntaub ntawv teeb liab ntawm cov xim yog luv luv mus rau lwm cov circuits. 3. Xyuas seb cov ntaub ntawv cascaded ports ntawm tus tsav tsheb ICs ntawm cov xim yog qhib, luv luv, los yog soldered. Lus Cim: Txoj kev kuaj xyuas qhov hluav taws xob tuaj yeem siv los nrhiav qhov teeb meem yooj yim dua, xyuas seb qhov voltage ntawm cov ntaub ntawv chaw nres nkoj txawv ntawm qhov ib txwm muaj, thiab txiav txim siab qhov chaw txhaum. K. Teeb meem nrog cov zis 1. Xyuas seb cov kab ntawm cov zis interface mus rau lub teeb liab tso zis IC txuas lossis luv luv. 2. Xyuas seb lub moos latch teeb liab ntawm qhov chaw nres nkoj tso zis puas zoo li qub. 3. Xyuas seb qhov cascade tso zis cov ntaub ntawv chaw nres nkoj ntawm lub xeem tsav IC txuas nrog cov ntaub ntawv chaw nres nkoj ntawm cov zis interface los yog seb nws puas yog luv luv. 4. Txawm hais tias cov teeb liab tso tawm yog luv-circuited nrog ib leeg lossis luv luv rau hauv av. 5. Tshawb xyuas seb qhov tso zis cable puas zoo. A. Tag nrho lub vijtsam tsis ci (dub screen) 1. Tshawb xyuas seb lub tshuab hluav taws xob puas muaj zog. 2. Tshawb xyuas seb txoj kab sib txuas puas txuas thiab seb nws puas txuas tsis raug. (Sync npo) 3. Lub vijtsam synchronization pom seb lub teeb ntsuab ntawm daim npav xa thiab daim npav txais yog flickering; yog tias tsis muaj flicker, xyuas seb daim npav puas raug tso cai, 4. Txawm hais tias lub teeb ntsuab ntawm daim npav tau txais kev sib txuas lus flickers, yog tias tsis muaj flicker, xyuas seb lub network cable puas xoob, yog tias tsis yog, seb lub taub hau siv lead ua tau nias zoo. 5. Txawm hais tias lub khoos phis tawj saib muaj kev tiv thaiv, lossis thaj tsam ntawm lub vijtsam yog xim dub lossis xiav ntshiab. (Sync npo) B. Tag nrho lub rooj tsavxwm tsis teeb (black screen) 1. Yog hais tias ob peb lub rooj sib law liag tsis teeb nyob rau hauv txoj kab rov tav, xyuas seb qhov kev sib txuas ntawm cov kab hluav taws xob ntawm lub rooj tsav xwm ib txwm muaj thiab lub rooj tsav xwm txawv txav txuas nrog; los yog seb lub nti 245 yog qhov qub, 2, lub longitudinal kev taw qhia ntawm ob peb sib law liag boards tsis kaj, xyuas seb lub hwj chim mov ntawm cov kab no yog ib txwm. C. Lub tsev board tsis teeb 1. Xyuas seb kab tus pin thiab 4953 tso zis tus pin puas txuas. 2, xyuas seb 138 puas zoo li qub. 3. Xyuas seb 4953 puas kub lossis kub. 4. Xyuas seb 4953 puas muaj qib siab. 5. Xyuas seb tus pins tswj 138 thiab 4953 puas txuas nrog. D. Lub rooj tsavxwm tsis muaj xim 1. Xyuas seb cov ntaub ntawv 245 RG puas yog tso tawm. 2. Txheeb xyuas seb tus pin tso zis ntawm tus tsav ib txwm muaj IC thiab tus pin input ntawm qhov txawv txav IC txuas nrog. khau raj: (1) Qhib cov zaub ua ntej, thiab tom qab ntawd qhib lub tshuab computer. s (2) Pib lub LED tswj vaj huam sib luag, nkag mus rau cov zaub editing software, qhib cov ntaub ntawv kho, thiab khiav cov npe program. (3) Tig rau lub siab hloov pauv rau cov zaub kom muab lub zog rau cov zaub. Kaw: (1) Tua tawm lub siab hloov pauv rau cov zaub ua ntej. (2) Tshem tawm qhov tshwj xeeb kho software rau lub vijtsam zaub thiab tawm txhua qhov kev pab cuam. (3) Tua lub tshuab computer thiab tua cov zaub. (4) Tshem tawm tag nrho cov khoom siv hluav taws xob txuas nrog cov khoom siv. Cov kev ceev faj: (1) Kev ua haujlwm ntawm lub vijtsam zaub yuav tsum tau ua nruj me ntsis raws li lub zog ntawm lub zog rau thiab tawm. (2) Thaum cov zaub ua haujlwm, thov tsis txhob ntsaws lossis tshem tawm lub rooj tsavxwm thiab txhua yam khoom siv txuas nrog cov zaub thaum lub hwj chim qhib. (3) Nws tsis raug tso cai ua si thiab teeb tsa software uas tsis cuam tshuam nrog cov zaub ntawm lub khoos phis tawj siab rau lub vijtsam zaub, txhawm rau tiv thaiv cov kab mob los ntawm kev nkag mus rau lub khoos phis tawj, kom tsis txhob cuam tshuam rau kev ua haujlwm ntawm cov zaub. npo.
