Njira zisanu zazikulu zowunikira zowunikira za LED

1. 1-10V dimming: Pali mabwalo awiri odziyimira pawokha mu 1-10V dimming chipangizo. Imodzi ndi dera lamagetsi wamba, lomwe limagwiritsidwa ntchito kuyatsa kapena kuzimitsa magetsi ku zida zowunikira, ndipo linalo ndi dera locheperako, lomwe limapereka chidziwitso cha Voltage, limauza zida zowunikira. 0-10V dimming controller nthawi zambiri imagwiritsidwa ntchito powongolera nyali za fulorosenti. Tsopano, chifukwa magetsi okhazikika amawonjezedwa ku gawo la dalaivala la LED ndipo pali dera lodzilamulira lodzipatulira, kotero 0 -10V dimmer ikhoza kuthandizira chiwerengero chachikulu cha kuyatsa kwa LED. Komabe, zofooka za ntchito zikuwonekeranso kwambiri. Zizindikiro zochepetsera mphamvu zochepa zimafuna mizere yowonjezera, yomwe imawonjezera kwambiri zofunikira zomanga.

2. Dimming ya DMX512: Protocol ya DMX512 idapangidwa koyamba ndi USITT (United States Institute of Theatre Technology) kukhala mawonekedwe owoneka bwino a digito kuchokera ku kontrakitala kuwongolera dimmer. DMX512 imadutsa machitidwe a analogi, koma sangathe kusintha machitidwe a analogi. Kuphweka kwa DMX512, kudalirika (ngati kuikidwa ndi kugwiritsidwa ntchito moyenera), ndi kusinthasintha kumapangitsa kuti ikhale yosankhidwa ngati ndalama zilola. Mu ntchito zothandiza, njira yolamulira ya DMX512 nthawi zambiri imakhala yopanga magetsi ndi owongolera pamodzi. Wowongolera wa DMX512 amawongolera mizere 8 mpaka 24 ndikuyendetsa mwachindunji mizere ya RBG ya nyali za LED. Komabe, pomanga mapulojekiti owunikira, chifukwa cha kufooka kwa mizere ya DC, ndikofunikira kukhazikitsa chowongolera pamtunda wa mita 12, ndipo mabasi owongolera ali munjira yofananira. , motero, wowongolera ali ndi mawaya ambiri, ndipo nthawi zambiri zimakhala zosatheka kupanga.

3. Triac dimming: Triac dimming yakhala ikugwiritsidwa ntchito mu nyali za incandescent ndi nyali zopulumutsa mphamvu kwa nthawi yayitali. Ndiwonso njira yomwe imagwiritsidwa ntchito kwambiri pakuwunikira kwa LED. Dimming ya SCR ndi mtundu wa mdima wakuthupi. Kuyambira pa AC gawo 0, voteji yolowetsayo imadumphira kukhala mafunde atsopano. Palibe kulowetsa kwamagetsi mpaka SCR itatsegulidwa. Mfundo yogwirira ntchito ndikupangira mawonekedwe amagetsi otulutsa ma tangential mutatha kudula mawonekedwe amagetsi olowera kudzera pamakona a conduction. Kugwiritsa ntchito mfundo ya tangential kumatha kuchepetsa mphamvu yamagetsi otulutsa, potero kuchepetsa mphamvu ya katundu wamba (katundu wotsutsa). Ma Triac dimmers ali ndi maubwino osintha bwino kwambiri, kuchita bwino kwambiri, kukula kochepa, kulemera kopepuka, komanso kuwongolera kwakutali, ndikuwongolera msika.

4. PWM dimming: Pulse width modulation (PWM-Pulse Width Modulation) luso limazindikira kulamulira kwa maulendo a analoji kudzera pa-off control of inverter circuit switch. Kutulutsa kwa ma waveform aukadaulo wa pulse wide modulation ndi ma pulse of size ofanana omwe amagwiritsidwa ntchito m'malo mwa mawonekedwe omwe akufuna.

Kutengera chitsanzo cha sine wave, ndiko kuti, kupanga voteji yofananira ya ma pulses awa kukhala mafunde a sine, ndikupanga ma pulses kukhala osalala momwe ndingathere komanso ma harmonics otsika. Malinga ndi zosowa zosiyanasiyana, m'lifupi mwake kugunda kulikonse kungasinthidwe molingana ndi kusintha voteji linanena bungwe kapena pafupipafupi linanena bungwe, potero kulamulira dera analogi. Mwachidule, PWM ndi njira yosinthira ma siginecha a analogi pa digito.

Kupyolera mukugwiritsa ntchito ma counters-resolution counters, chiŵerengero chokhalamo cha square wave chimasinthidwa kuti chisindikize mulingo wa siginecha inayake ya analogi. Chizindikiro cha PWM chikadali cha digito chifukwa nthawi iliyonse, mphamvu zonse za DC zimakhalapo kapena kulibe. Magetsi kapena gwero lapano limayikidwa pa katundu woyerekeza motsatizana mobwereza bwereza ma pulses. Mphamvu ikayatsidwa, ndipamene magetsi a DC amawonjezedwa pamtolo, ndipo ikatha, ndipamene magetsi amachotsedwa.

Ngati kuchuluka kwa kuwala ndi mdima kumaposa 100Hz, zomwe diso la munthu limawona ndi kuwala kwapakati, osati kuwala kwa LED. PWM imasintha kuwala posintha gawo la nthawi yowala ndi yakuda. Pakuzungulira kwa PWM, chifukwa kuwala komwe kumawonedwa ndi diso la munthu pakuwala kokulirapo kuposa 100Hz ndi njira yophatikizika, ndiko kuti, nthawi yowala imatengera gawo lalikulu la kuzungulira konseko. Ikakhala yayikulu, imamveka bwino m'maso mwa munthu.

5. Dimming ya DALI: Muyezo wa DALI watanthauzira netiweki ya DALI, kuphatikiza mayunitsi opitilira 64 (atha kuyankhidwa paokha), magulu 16 ndi zithunzi 16. Magawo osiyanasiyana owunikira pa basi ya DALI amatha kugawidwa m'magulu kuti akwaniritse kuwongolera ndi kuyang'anira zochitika zosiyanasiyana. Muzogwiritsa ntchito, wolamulira wamba wa DALI amawongolera mpaka 40 mpaka 50 magetsi, omwe amatha kugawidwa m'magulu 16, ndipo amatha kuchita zinthu zina mofananira. Mu netiweki ya DALI, malangizo 30 mpaka 40 amatha kusinthidwa pamphindikati. Izi zikutanthauza kuti wowongolera ayenera kuyang'anira malangizo a 2 dimming pamphindi pa gulu lililonse lowunikira.