| 摘要 |
<p>The present invention relates to a method of reducing the flicker index of a constant current direct AC LED driver, comprising the step of flowing a current through the segments (Li, L2,..., LN) of a LED string, when the power grid voltage value is smaller than the voltage drop on the string made of the segments (L-i, L2 LN), the flowing current equaling the discharge current of a capacitor (Ci) set in parallel with the string made of the segments (L-i, L2 LN), one lead of the capacitor (C-i) being connected to the anode of the first LED of the first segment (Li), and the other lead of the capacitor (C-i) being connected to the cathode of the last LED of the last segment (LN). The invention also relates to circuits associated to the above mentioned method.</p> |
