Future LED dimming system
Ndiye ndi mtundu wanji wa dimming system yomwe ma LED akuyenera kugwiritsa ntchito?
4.1 PWM Dimming
Monga tanena kale, kuwala kwa LED ndibwino kugwiritsa ntchito kuwala kwa PWM. Mukamagwiritsa ntchito dimming ya PWM, mutha kukhazikitsa jenereta yosavuta ya PWM mu switch ya khoma, kenako gwiritsani ntchito potentiometer kuwongolera chiŵerengero cha ntchito ya PWM kuti mukwaniritse dimming. Koma ngati mukufuna kuyatsa ndi kuzimitsa magetsi, muyenera kuwonjezera mawaya. Chifukwa chake, sizigwirizana ndi kutsogolera kwa kusintha kwa thyristor pakhoma loyambirira. Chosinthira choyambirira cha thyristor chili ndi njira ziwiri zokha, zomwe zimatha kuchepetsedwa ndikusinthidwa. Ubwino umenewu ndi wovuta kuti ukhale wogwirizana. Komabe, kwenikweni, nyali zowala zomwe zimagwiritsidwa ntchito kwambiri ndi nyali zapa desiki kapena nyali zoyimirira. Zosintha za dimmer zimayikidwa pa chingwe chamagetsi m'malo mwa khoma, kotero zilibe kanthu kugwiritsa ntchito njira ziwiri pakhoma. Mwanjira ina, dimming ya PWM itha kugwiritsidwa ntchito mwachindunji ku nyali za dimming table.
