LED ayaa aad iyo aad u ballaaran loo isticmaalaa qalabka nalalka. Marka lagu daro faa'iidooyinka gaarka ah ee hababka iftiinka dhaqameed, marka lagu daro hagaajinta tayada nolosha, hagaajinta waxtarka ilaha iftiinka iyo kordhinta nolosha adeegga qalabka nalalka, LED waxay isticmaashaa hawsheeda khafiifinta gaarka ah si ay u beddesho heerkulka midabka iyo iftiinka iftiinka. , oo si buuxda u gaadho faa'iidada ugu weyn ee codsiyada tamarta-badbaadinta.

Hufnaanta yaraynta eeNalalka LED-kaqalabyadu waxay ku xidhan yihiin isha nalka LED-ka ee ku haboon iyo sahayda korontada.

Guud ahaan,Ilaha iftiinka LEDWaxaa loo qaybin karaa laba qaybood: hal il iftiin diode LED ama isha iftiinka diode leh caabbinta. Codsiga, mararka qaarkood ilaha iftiinka LED waxaa loo qaabeeyey sidii module ka kooban beddelaha DC-DC, iyo cutubyada adag ee noocan oo kale ah lagama hadlin qodobkan. Haddii isha iftiinka LED-ka ama moduleka uu yahay diode gaar ah laftiisa, habka dimming ee caadiga ah waa in la hagaajiyo baaxadda gelinta LED-ka hadda, sidaas darteed xulashada awoodda wadista LED waa inay tixraacdaa sifadan.

LED-yada caadiga ah xaaladaha mugdiga liidata:

Marka darawalka korantada LED-ka ee leh wax-soo-saarka hadda la hagaajin karo loo isticmaalo yaraynta nalalka LED-ka, geeridu waa dhibaato caadi ah. Inkastoo ayDarawalka LEDKorontadu waxay si fiican u shaqayn kartaa marka ay si buuxda u buuxsanto, way iska caddahay in daalku aanu simanayn marka darawalka LED aanu ku jirin culays buuxa.

Xalka Wax-soo-saarka Balaadhka Wax-soo-saarka (PWM) ee Wax-soo-saarka

Haddii awoodda darawalka LED loo isticmaalo bararka iftiinka LED-ka oo hoos u dhigaya culeys buuxa, ma jirto wax dhib ah oo ku saabsan dhimashada. Doodda kor ku xusan waa run, laakiin maaha mid wax ku ool ah. Dhab ahaantii, xargaha iftiinka LED-ka waxaa badanaa loo isticmaalaa codsiyo kala duwan (nalalka qurxinta / nalalka iftiinka / nalalka xayeysiinta) halkaasoo dhererka aan si sax ah loo qiyaasi karin. Sidaa darteed, xalka ugu fudud uguna wanaagsan ee codsiga waa in si sax ah loo doorto awoodda darawalka LED oo leh xajmiga garaaca wadnaha ee PWM dimming function si loo gaaro shuruudaha khafiifinta ee xargaha iftiinka LED. Iftiinka wax-soo-saarka wuxuu yarayn karaa isbeddelka dhalaalka ee dhalaalka iyadoo loo eegayo wareegga culeyska ee calaamadda dhalaalidda. Halbeegyada muhiimka ah ee xulashada sahayda korantada wadista ayaa ah xallinta dhimista iyo inta jeer ee wax soo saarka ballaca ballaca garaaca wadnaha PWM. Awooda yaraynta ugu yar waa inay ahaataa mid hoose sida 0.1% si loo gaadho 8bit xallinta dhimista si loo daboolo dhammaan codsiyada iftiinka iftiinka iftiinka. Wax-soo-saarka balaadhka garaaca wadnaha ee soo noqnoqda PWM waa inuu ahaadaa mid sarreeya intii suurtagal ah, Si looga hortago dhibaatada iftiinka iftiinka ee lagu sheegay Shaxda (I), marka loo eego suugaanta cilmi-baarista farsamada ee laxiriirta, inta jeer waxaa lagula talinayaa inay ka sarreyso ugu yaraan 1.25 kHz si loo yareeyo rooxaanta rooxaanta ee indhaha bini'aadamka ka arki karaan.