Driven by energy conservation and technological innovation, LED lights quickly replace traditional Incandescent lamps and energy-saving lamps. In combination with the development of smart home devices, there are more and more smart learning lamp manufacturers in the market. These manufacturers claim that their products have no blue light and no strobe. How to select a superb-quality eye-protection learning lamp from a wide range of products is very important.
Hazards of strobe
The impact of light on human health is a long-term chronic accumulation process, and developed countries in the world have started relevant research very early. According to different factors such as the flickering frequency of light and the variation range of light intensity, the degree of damage by light to the human body is also different. The results of the current study found that strobe causes adverse physiological responses in the human body including:
- Headache and eye fatigue
- Photosensitive epilepsy
- Vision deterioration
- Causes of LED strobe
Reason of LED strobe
Although the LED lamp is powered by DC power supply, the input power supply is still AC. It is difficult to completely avoid the AC ripple passing through the transformer to the secondary side, causing fluctuations in output ripple current or voltage. Among them, the ripple current is one of the key causes behind the strobe generation. The ripple current still remains as an AC component after rectification and filtering. When the ripple current is superimposed on the DC, it has different frequencies and curves. The AC component causes fluctuations to the power of the LED module, which in turn causes changes in brightness, resulting in strobe.
Elimination of strobe
Under current technical context, there are many methods to implement a technology without strobe. However, a cost-effective LED power supply that can resolve the strobe problem is the key to selection.
Asian Power Devices has an in-depth understanding of the smart learning lamp. According to the number of LEDs used for smart learning and the power consumption of the motherboards, a cost-effective LED power supply is introduced. This power supply can better manage the AC ripple current and problems of strobe, and meet the PF requirements. Currently, this power supply has obtained certifications of GB19510.1-2009, GB19510.14-2009, GB17743-2007, GB17625.1-2012 in the Chinese market as well as IEC61347-1 in the European market. More importantly, this power supply has been in mass production for some products of smart learning lamps.