Why the led light flashes, and how to solve it?

Generally, the power ripple of led lamps is too large, which makes LED lamps flicker. This flicker is invisible to the human eye, and you can see it clearly by taking pictures with your mobile phone. If the power supply PF value of LED lamp is low, there will be no stroboscopic (except for resistance-capacitance power supply). However, the power supply with low PF value will cause great pollution to the power grid, and the LED power supply larger than 10W generally requires PF value. Because of the cost, most power supplies with high PF value will have stroboscopic. The PF value is: power factor, the PF value of incandescent lamp is 1, and the PF value of switching power supply without PF correction is about 0.6. The power supply with PF correction circuit has a PF value above 0.9. The higher the PF value, the higher the power grid utilization rate and the more energy saving! PF value refers to the power grid utilization (active power), which has nothing to do with the efficiency of switching power supply!

Solution: (1) add an electrolytic capacitor behind the rectifier bridge to filter (2)LED strobe, which may be too low to improve the switching frequency of SCR.