LED inoratidzira mutyairi zvigadzirwa zvinonyanya zvinosanganisira row scan driver machipisi uye column driver machipisi, uye minda yavo yekushandisa ndiyo inonyanyakunze advertising LED skrini,indoor LED inoratidza uye bhazi stop LED inoratidza. Kubva pamaonero emhando yekuratidzira, inovhara monochrome LED kuratidza, mbiri mbiri ye LED kuratidza uye yakazara ruvara rwe LED kuratidza.
Mune basa re LED yakazara ruvara kuratidza, basa remutyairi IC kugashira data rekuratidzira (kubva pakadhi rekugamuchira kana vhidhiyo processor uye mamwe masosi eruzivo) inoenderana neprotocol, mukati inogadzira PWM uye ikozvino nguva shanduko, uye zorodza zvinobuda uye kupenya kwegreyscale. uye mamwe ane hukama PWM mafungu ekuvhenekesa maLED. Iyo yeperipheral IC inoumbwa nemutyairi IC, logic IC uye MOS switch inoshanda pamwe chete pane yekuratidzira basa reiyo inotungamira kuratidzwa uye inosarudza mhedzisiro yainopa.
LED mutyairi machipisi anogona kukamurwa kuita zvakajairika-chinangwa machipisi uye yakakosha-chinangwa machipisi.
A general-chinangwa chip, iyo chip pachayo haina kunyanya kugadzirirwa maLEDs, asi mamwe logic machipi (seyakaita serial 2-parallel shift marejista) ane mamwe mabasa epfungwa ekuratidzwa anotungamira.
Iyo yakakosha chip inoreva mutyairi chip yakanyatso kugadzirirwa iyo LED kuratidza zvinoenderana neinopenya maitiro eiyo LED. LED ndiyo yazvino hunhu mudziyo, ndiko kuti, pasi pechimiro chekuzadza conduction, kupenya kwayo kunoshanduka nekuchinja kwezvino, pane kugadzirisa voltage pairi. Naizvozvo, chimwe chezvinhu zvikuru zveiyo yakatsaurirwa chip ndeyekupa inogara iripo sosi. Iyo inogara iripo ikozvino sosi inogona kuve yakagadzikana kutyaira kweiyo LED uye kubvisa kupenya kweiyo LED, inova ndiyo inodiwa kuti iyo LED inoratidzira kuratidza mifananidzo yemhando yepamusoro. Mamwe-akakosha-chinangwa machipisi anowedzera mamwe akakosha mabasa kune zvinodikanwa zvemaindasitiri akasiyana, sekuona LED kukanganisa kukanganisa, ikozvino kuwana kutonga uye kururamisa kwazvino.
Evolution yemutyairi ICs
Mumakore ekuma1990, ma LED ekuratidzira maapplication aitongwa nekamwe uye maviri mavara, uye anogara ari voltage driver ICs akashandiswa. Muna 1997, nyika yangu yakaonekwa yekutanga yakatsaurirwa drive control chip 9701 yekuratidzwa kweLED, iyo yakasimuka kubva pa16-level grayscale kusvika 8192-level grayscale, ichiziva WYSIWYG yevhidhiyo. Zvadaro, tichifunga nezve LED chiedza-emitting maitiro, anogara aripo iye zvino mutyairi yave sarudzo yekutanga kune yakazara-ruvara LED kuratidza mutyairi, uye 16-chiteshi mutyairi ane yakakwirira kubatanidzwa akatsiva 8-chiteshi mutyairi. Mukupera kwema1990, makambani akadai saToshiba muJapan, Allegro neTi muUnited States akatevedzana akatanga 16-channel LED inogara iripo machipisi ekutyaira. Mazuvano, kuitira kugadzirisa PCB wiring dambudziko rediki pitch LED inoratidza, vamwe mutyairi IC vagadziri vakaunza yakanyatsobatanidzwa 48-chiteshi LED inogara iripo mutyairi machipisi.
Performance zviratidzo zvemutyairi IC
Pakati pezviratidzo zvekushanda zvekuratidzira kwe LED, chiyero chekuzorodza, grey level uye kuratidzwa kwemufananidzo ndechimwe chezviratidzo zvakakosha. Izvi zvinoda kuenderana kwezvino pakati pe LED kuratidza mutyairi IC chiteshi, yakakwirira-kumhanya kutaurirana interface mwero uye inogara iripo yekupindura kumhanya. Kare, mwero wekuzorodza, grey chiyero uye reshiyo yekushandisa yaive hukama hwekutengeserana. Kuve nechokwadi chekuti imwe kana mbiri yezviratidzi inogona kuve nani, zvinodikanwa kubayira zvakasara zviratidzo zviviri. Nechikonzero ichi, zvakaoma kune akawanda ma LED anoratidza kuti ave neakanakisa epasirese mune anoshanda maapplication. Pamwe chiyero chekuvandudza hachina kukwana, uye mitsetse mitema inotaridzika kuoneka pasi pekumhanya kwekamera michina, kana greyscale haina kukwana, uye ruvara uye kupenya hazvienderane. Nekufambira mberi kwetekinoroji yevatyairi IC vagadziri, kwave nekubudirira mumatambudziko matatu makuru, uye matambudziko aya akagadziriswa. Parizvino, mazhinji eSRYLED LED anoratidza ane yakanyanya kuzorodza mwero ne3840Hz, uye hapana mitsara mitema ichaonekwa kana mufananidzo une kamera michina.
Maitiro emutyairi ICs
1. Kuchengetedza magetsi. Kuchengetedza magetsi ndiko kutsvaga kusingaperi kwekuratidzira kwe LED, uye zvakare iri chiyero chakakosha chekufunga nezvekuita kwemutyairi IC. Simba rekuchengetedza remutyairi IC rinonyanya kusanganisira zvinhu zviviri. Imwe ndeyekunyatso kudzikisa inogara iripo inflection point voltage, nekudaro ichidzikisa echinyakare 5V magetsi ekushanda pazasi 3.8V; imwe yacho ndeyekudzikisa magetsi ekushanda uye kushanda ikozvino kwemutyairi IC nekugadzirisa IC algorithm uye dhizaini. Parizvino, vamwe vagadziri vakaparura anogara aripo iye zvino mutyairi IC ine yakaderera kutendeuka voltage ye0.2V, iyo inovandudza chiyero chekushandiswa kwe LED neinopfuura 15%. Iyo magetsi emagetsi akadzikira 16% pane ayo ezvakajairwa zvigadzirwa kuderedza kupisa kugadzirwa, kuitira kuti simba remagetsi rekuratidzwa kwe LED rivandudzwe zvakanyanya.
2. Kubatanidzwa. Nekukurumidza kuderera kwepixel pitch yechiratidziro che LED, zvigadziriso zvakaputirwa kuti zvigadzirwe panzvimbo yeyuniti inowedzera nejeometric multiples, izvo zvinowedzera zvakanyanya kusimba kwechikamu chekutyaira pamusoro peiyo module. KutoraP1.9 diki diki LED Screen semuenzaniso, 15-scan 160 * 90 module inoda 180 inogara iripo mutyairi ICs, 45 line chubhu, uye 2 138s. Nezvishandiso zvakawanda, iyo inowanikwa wiring nzvimbo paPCB inova yakawandisa, zvichiwedzera kuoma kwedhizaini dhizaini. Panguva imwecheteyo, kurongeka kwakadai kwezvikamu zvinogona kukonzera nyore nyore matambudziko akadai seasina kunaka soldering, uye zvakare kuderedza kuvimbika kwemodule. Vashoma mutyairi ICs anoshandiswa, uye PCB ine yakakura wiring nzvimbo. Kudiwa kubva kudivi rekushandisa kunomanikidza mutyairi IC kuti atange nzira yakanyatsobatanidzwa yehunyanzvi.
Parizvino, mainin driver IC suppliers muindastiri vakateedzana yakanyatso kusanganisa 48-channel LED inogara iripo mutyairi ICs, iyo inobatanidza hukuru-hukuru hwekutenderera maseketi mumutyairi IC wafer, iyo inogona kuderedza kuoma kwekushandisa-padivi PCB redunhu bhodhi dhizaini. . Iyo zvakare inodzivirira matambudziko anokonzerwa nehunyanzvi hwekugadzira kana dhizaini misiyano yeinjiniya kubva kune vakasiyana vagadziri.
Nguva yekutumira: Mar-03-2022
