Kodi LED ndi chiyani?

LED ndi yachidule ya Light Emitting Diode.Kuwala kwa LED kumatulutsa kuwala chifukwa cha luminescence yamagetsi.Amadziwikanso kuti "kuwala kozizira" monga, mosiyana ndi mababu akale a incandescent, kuwala sikumapangidwa ndi kutentha kwazitsulo zachitsulo.Mbali inayi, diode imatulutsa kuwala pamene ikuyenda kudzera muzitsulo ziwiri zotchinga mwapadera za silicon.Ndi imodzi mwa njira zopangira mphamvu komanso zopulumutsa mphamvu zopangira kuwala.

Nyali ya LED imakhala ndi zinthu zolimba zopanda zosunthika ndipo nthawi zambiri imapangidwa kukhala pulasitiki yowonekera.Izi zimatsimikizira kukhazikika kwakukulu.LED ikayatsidwa, imatulutsa pafupifupi zero kutentha.Izi zimachepetsa vuto lakuziziritsa zida zamagetsi.

LED yoyamba inalengedwa ndi woyambitsa Russian Oleg Losev mu 1927. Kwa zaka zambiri, zinali zotheka kupanga ma LED a infrared, ofiira ndi achikasu.Ma diode awa adapezeka m'chilichonse kuyambira zowongolera zakutali mpaka mawayilesi.

Sizinafike mpaka 1994 pomwe wasayansi waku Japan Shuji Nakamura adatha kuwonetsa bwino LED yabuluu.Ma LED oyera ndi obiriwira adatsatira posakhalitsa, ndikuyika maziko a kusintha kwa LED komwe tawona muukadaulo wowunikira ndikuwonetsa.

KODI KUSONYEZA KWA LED KUCHITIKA BWANJI?

Chiwonetsero cha LED chimakhala ndi ma LED ambiri otalikirana kwambiri.Posintha kuwala kwa LED iliyonse, ma diode amalumikizana pamodzi amapanga chithunzi pachiwonetsero.

Kuti apange chithunzi chamtundu wowala, mfundo za kusakaniza kwamtundu wowonjezera zimagwiritsidwa ntchito, momwe mitundu yatsopano imapangidwira mwa kusakaniza kuwala kwa mitundu yosiyanasiyana.Chiwonetsero cha LED chimakhala ndi ma LED ofiira, obiriwira ndi a buluu omwe amaikidwa mokhazikika.Mitundu itatu iyi imaphatikizana kupanga pixel.Mwa kusintha mphamvu ya ma diode, mabiliyoni amitundu amatha kupangidwa.Mukayang'ana pazenera la LED kuchokera patali, ma pixel amitundu yosiyanasiyana amawoneka ngati chithunzi.

Kodi RGB ndi chiyani?

RGB ndi yachidule ya Red, Green ndi Blue.Ndi mtundu wamtundu womwe umagwiritsa ntchito mfundo yakuti mitundu yonse yowonekaakhoza kusakanikirana kuchokera kuzinthu zitatu izimitundu.Amagwiritsidwa ntchito pafupifupi mitundu yonse ya zowonetsera, kuphatikizapo zowonetsera za LED.

Kodi SMD ndi chiyani?

SMD amatanthauza Surface Mount Chipangizo.Izi ndi zida zamagetsi zomwe zimayikidwa pamtunda mwachindunji pa bolodi losindikizidwa - osati monga kale pogulitsa pini yachitsulo pansi pa bolodi la dera.

Muukadaulo wowonetsera LED, lingaliro la SMD limagwiritsidwa ntchito mosiyana.Chiwonetsero cha SMD ndi chowonetsera cha LED pomwe ma diode ofiira, obiriwira ndi abuluu amayikidwa mu kansalu kakang'ono ka pulasitiki komwe kamayikidwa pamwamba pama board osindikizidwa awonetsero.Ma diode akazunguliridwa motere, amatenga malo ochepa kwambiri, zomwe zimapangitsa kuti pakhale mawonedwe ocheperako pakati pa ma diode ndi mawonekedwe apamwamba.

KODI CHISONYEZO CHA LED AMAGWIRITSA NTCHITO MPHAMVU ZANGATI?

Ma LED ndiukadaulo wosagwiritsa ntchito mphamvu kwambiri, chifukwa chake kugwiritsa ntchito mababu opulumutsa mphamvu masiku ano kumagwiritsidwa ntchito kwambiri.Kuchuluka kwa mphamvu zomwe ma diode amagwiritsiridwa ntchito pa chiwonetsero cha LED zimadalira mtundu wa chiwonetsero, kuwala ndi kagwiritsidwe ntchito.

Pali mitundu yosiyanasiyana ya ma LED ndi zowonetsera.Kugwiritsa ntchito mphamvu kwa chiwonetsero chamkati, mwachitsanzo, kudzakhala kosiyana ndi chizindikiro chakunja cha digito, chomwe chiyenera kuwonedwa ndi kuwala kwa dzuwa.Kuwala kwa chiwonetserochi ndichinthu chachikulu.Zithunzizo ziyenera kukhala zomveka bwino, koma kuwala kochokera pachiwonetsero kuyenera kusawala.Chiwonetsero chakunja cha LED chiyenera kukhala chowala kwambiri masana kuposa pamene mdima ukugwa.

Zomwe zikuwonetsedwa zimakhalanso ndi chikoka.Ma LED amawonetsa zithunzi poyatsa ndi kusintha kuwala kwa ma diode amitundu.Chojambula choyera kwathunthu chokhala ndi mawu akuda chidzafuna ma diode ambiri owunikira - komanso mphamvu zochulukirapo - kuposa zoyera zakuda.

KODI KUONETSA KWA LED KUKHALA KWAnthawi yayitali bwanji?

Ndizovuta kunena chilichonse chokhudza moyo wa chiwonetsero cha LED chifukwa zinthu zambiri zimabwera.Komabe, ndi chisamaliro choyenera, chiwonetserochi chikhoza kupitilira zaka khumi.Mofanana ndi mitundu yonse yamagetsi, nthawi ya moyo imakhudzidwanso ndi kugwiritsidwa ntchito kwa tsiku ndi tsiku komanso chilengedwe chozungulira mawonetsero.Zithunzi zowala komanso zowala kwambiri zimavala kwambiri pachiwonetsero kuposa zithunzi zakuda komanso kuwala kochepa.Zinthu monga chinyezi ndi mchere wopezeka mumpweya ungathenso kuchitapo kanthu.

Pa moyo wa chiwonetsero cha LED, kuwala kwa ma diode kumachepa.Ndi kuchuluka kwake zimadalira mtundu ndi m'badwo wa diode.Zowonetsera zambiri za LED sizigwiritsa ntchito mphamvu zawo zonse, kotero kuchepetsa sikudzakhala vuto.

KODI PIXEL PITCH NDI KUSINTHA KWA MASONYEZO NDI CHIYANI?

Mtunda wapakati pa ma diode a chiwonetsero cha LED umatsimikizira momwe chiwonetserocho chikuyendera.Mtunda wopita pakati pa gulu loyandikana nawo umayesedwa kuchokera pakati pa gulu lirilonse la ma diode ofiira, obiriwira ndi a buluu.Mtunda uwu umadziwika kuti pixel pitch.Gulu lililonse la diode limapanga pixel.

Ngati chiwonetsero cha LED chili ndi kukwera kwa pixel ya 1 cm, patha kukhala ma pixel 100 x 100 pa lalikulu mita imodzi ya chiwonetsero.Kusintha kwa chiwonetsero kumaperekedwa ngati manambala omwe amawonetsa m'lifupi ndi kutalika kwa ma pixel.Ngati muli ndi skrini ya 6 x 8-mita yokhala ndi 1 cm mu pixel pitch pitch, ili ndi mapikiselo a 600 x 800.

Pali zowonetsera za LED zokhala ndi kukwera kwa pixel kulikonse kuyambira ma centimita angapo mpaka mamilimita imodzi.

KODI NDISANKHE CHIYANI?

Kusamvana komwe mukufunikira pa chiwonetsero cha LED kumadalira mtunda wowonera.Kodi omvera anu aziwonera zowonetsera kuchokera patali bwanji?Ngati muli pafupi ndi chiwonetsero chotsika cha LED (patali pakati pa ma diode), zidzakhala zovuta kuwona zomwe zili pachiwonetsero.

Nthawi zambiri pali kulumikizana pakati pa kuwongolera kowonetsera ndi mtengo.Kukwera kwapamwamba, ma diode amachuluka pa m2 - choncho mtengo wa m2 wapamwamba.

Ngati mukuyika chizindikiro cha digito pafupi ndi msewu waukulu kapena pa facade yomanga, idzawoneka patali.Apa, chiwonetsero chapamwamba chingakhale chosafunikira - komanso chokwera mtengo.Ngati ndi chiwonetsero chapansi pakati pa sitolo yayikulu, omvera amayandikira kwambiri.Apa, chiwonetsero chapamwamba chimagwira bwino ntchito.

Lamulo labwino lachiwonetsero cha ma LED ndi: 1 mm pixel pitch pa mita iliyonse ya mtunda wowonera.