Feem ntau, tib neeg lub qhov muag tuaj yeem pom qhov flicker ntawm lub teeb nrog lub zaus mus txog 70 Hz, tab sis nws yuav tsis pom qhov flicker saum toj no zaus. Yog li ntawd, nyob rau hauv LED teeb pom kev zoo daim ntaub ntawv, yog hais tias tus mem tes teeb liab muaj ib tug tsawg-frequency tivthaiv nrog ib tug zaus qis dua 70 Hz, tib neeg lub qhov muag yuav hnov flicker. Ntawm chav kawm, hauv cov ntawv thov tshwj xeeb, muaj ntau yam uas yuav ua rau LED teeb nyem. Piv txwv li, nyob rau hauv offline low-power LED teeb pom kev zoo daim ntawv thov, ib tug ntau lub hwj chim topology yog cais flyback topology. GreenPoint, 8W offline LED tsav tsheb ntsib lub "Energy Star" cov qauv teeb pom kev zoo hauv lub xeev ® Piv txwv li, raws li sine square yoj lub zog hloov pauv ntawm flyback regulator tsis muab lub zog tas li rau qhov kev tsis ncaj ncees, qhov khoom siv tus kheej dynamic (DSS) Circuit Court tuaj yeem qhib thiab ua rau flashing. Txhawm rau kom tsis txhob muaj qhov teeb meem no, nws yog ib qho tsim nyog yuav tsum tau ua kom lub hauv paus kev tsis ncaj ncees yuav raug tso tawm ib nrab ntawm txhua lub voj voog ib nrab. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum xaiv qhov capacitance thiab qhov tseem ceeb ntawm kev tiv thaiv uas tsim los ntawm kev tsis sib haum xeeb.
Tsis tas li ntawd, cov ntxaij lim dej electromagnetic cuam tshuam (EMI) yuav tsum muaj txawm tias nyob rau hauv LED tsav daim ntawv thov uas muab kev kho lub zog zoo thiab txhawb TRIAC dimming. Lub sijhawm tam sim no tshwm sim los ntawm TRIAC kauj ruam yuav zoo siab rau lub ntuj resonance ntawm inductance thiab capacitor hauv EMI lim. Yog tias tus yam ntxwv resonance no ua rau cov tswv yim tam sim no poob qis dua TRIAC tuav tam sim no, TRIAC yuav tua. Tom qab ncua sij hawm luv luv, TRIAC ib txwm yuav rov qhib dua kom zoo siab rau tib lub suab nrov. Thaum lub sij hawm ib nrab lub voj voog ntawm lub zog tawm tswv yim, cov txheej xwm no yuav rov ua dua ntau zaus, ua rau pom LED flickering. Txhawm rau daws qhov teeb meem no, qhov xav tau tseem ceeb ntawm TRIAC dimming yog qhov kev tawm tswv yim ntawm EMI lim yog qhov tsawg kawg nkaus, thiab lub peev xwm yuav tsum tau txiav los ntawm TRIAC thiab winding impedance. Raws li cov qauv, yog hais tias lub capacitance nyob rau hauv lub dimming module raug txo, qhov kev tiv thaiv ntawm resonant Circuit Court yuav nce. Hauv txoj ntsiab cai, lub oscillation tuaj yeem raug tshem tawm thiab qhov xav tau ua haujlwm Circuit Court tuaj yeem rov pib dua.