74FCT3807DQGI8 ic cihp zophatikizika zamagetsi zamagetsi zotentha zimagulitsa zatsopano komanso zoyambirira malo amodzi okha kugula ntchito ya bom

1.LED ndi mtundu watsopano wa chipangizo chowunikira cha semiconductor chothandiza kwambiri komanso chokonda zachilengedwe.Poyerekeza ndi magwero ena owunikira, LED ili ndi zabwino zambiri pakuwunikira kwamagalimoto ndipo ili ndi chiyembekezo chogwiritsa ntchito.Njira zosiyanasiyana zophatikizira ma LED motsatizana ndi kufananiza kupanga zida za LED zimagwiritsidwa ntchito kuti zikwaniritse zofunikira pakuwunikira kwamagalimoto.

Ndi chitukuko chaukadaulo komanso chitukuko chofulumira chachuma cha anthu, zinthu za LED zakhala zikugwiritsidwa ntchito kwambiri m'miyoyo ya anthu.Zaka za zana la 21, kupanga kwa LED ndi kukula kwa msika kwafika pamlingo womwe sunachitikepo, msika wofunikira kwambiri wa LED ndi malo osiyanasiyana owonetsera, mitundu yosiyanasiyana ya mafoni am'manja, ndi zina zotero.Kuphatikiza apo, ma LED amagwira ntchito yofunika kwambiri pamisewu, kuunikira komanga, kukongoletsa mkati, ndi madera ena ambiri.Ndi chitukuko chofulumira chamakampani oyendetsa magalimoto, mabwalo oyendetsa magalimoto a LED akhala akugwiritsidwa ntchito kwambiri mumagetsi amakono amagalimoto, ndipo magwero am'mbuyomu amagalimoto monga nyali zakutsogolo akusinthidwa pang'onopang'ono ndi iwo.Nthawi yomweyo, LED imakhala ndi kuwala kowala kwambiri, nthawi yochepa yoyankhira (kuyankha mwachangu), mawonekedwe ophatikizika (kukula kochepa), moyo wautali wautumiki, ndi mawonekedwe ena, idzagwiritsidwa ntchito pazowunikira zamagalimoto komanso imakhala ndi tsankho lamphamvu komanso anti. - mawonekedwe a glare.Komabe, chifukwa cha zofooka za zinthu zosiyanasiyana, LED akadali ndi zolakwika zina, ayenera kupitiriza kusintha luso LED, kuti akwaniritse zosowa zamagetsi magalimoto.

2.LED ndi semiconductor chipangizo kuwala emitting diode, amene amapangidwa ndi semiconductors pawiri.LED ndi gwero lowala lomwe limakana kugwedezeka komanso kugwedezeka, limatetezedwa ndi kapu ya epoxy resin, pachimake ndi chaching'ono kwambiri, ndipo pachimake ndi PN junction core, kotero ili ndi mawonekedwe a PN mphambano, mwachitsanzo, kutsogolo conduction. , reverse odulidwa ndi overvoltage kuwonongeka, etc. Zina mwapadera Pazinthu zina zapadera, zimathanso kudziwika ngati emitter yowunikira.

3.Mayendedwe amtundu wa LED amagawidwa m'mitundu iwiri yoyendetsa: voteji yokhazikika komanso yoyendetsa pano.Chifukwa cha nthawi zonse pakali pano pagalimoto mtundu LED, mu kamangidwe ka PN mphambano-based, akhoza kukhala ubale exponential kuimira voteji LED ndi kusintha panopa, kotero ambiri ankagwiritsa ntchito.Constant-voltage drive njira nthawi zambiri ndikugwiritsa ntchito kusefa kwa resistive capacitance potsikira pansi kapena kusefa kwa thiransifoma, kugwiritsa ntchito ma diode owongolera magetsi kapena njira yosinthira magetsi, kumagetsi amagetsi a LED, koma mawonekedwe a kuwala kwa LED azikhala pano. kusintha mosalekeza pansi pa zotsatira zofanana.The liniya chowongolera mu nthawi zonse panopa galimoto njira ali mitundu iwiri: kufanana ndi mndandanda, pachimake ndi mphamvu triode kapena MOSFET ntchito mu liniya zone monga dynamically chosinthika resistor kulamulira katundu.mphamvu yamagetsi ndi yapano pamapeto onse a LED siubale wofananira, sungathe kuyendetsedwa mwachindunji ndi gwero lamagetsi, ndipo imayenera kuchepetsedwa pochepetsa mphamvu yapano kuti zisawonongeke kwambiri komanso kupewa kuwonongeka kwa LED.Kuwala kowala kwa LED ndi komweko sikuli Kuwala kowala sikuli kofanana ndi masiku ano, kuwala kowala kumawonjezeka ndi panopa, kumakhala ndi mphamvu zosiyana za magetsi, kukana kwamkati, ndi zolepheretsa zomwe zingatheke sizifanana, kotero sizingagwiritsidwe ntchito. molunjika limodzi.Sankhani njira yoyenera komanso yoyenera yoyendetsera iyenera kuganizira momwe mungagwiritsire ntchito komanso momwe zimagwirira ntchito, pamtundu uliwonse wamtundu uliwonse, zomwe zimafunikira kusankha mumayendedwe osinthira magetsi, kugwiritsa ntchito kofala kwambiri ndi PFM, PWM mode, ndi slide film control, yomwe ndizosavuta komanso zosinthika za mawonekedwe a PWM owongolera, amatha kukhala ndi nthawi yokhazikika pakugwira ntchito, komanso ayenera kuganiziranso kuchokera pamalingaliro opulumutsa mphamvu ndi njira zina, kukonza kuwala kwanthawi yomweyo kwa LED, ndikuchepetsa kugwiritsa ntchito mphamvu za LED.