We need make efforts on healthy lighting and light pollution reduction
The phenomenon of light pollution is everywhere in our lives, such as strobe, glare, ultraviolet radiation, and electromagnetic radiation. The common lighting in daily life will discomfort your eyes if you see a long time, it is mainly because the flicker problem. The common home fluorescent light would produce 100 times brightness changes per second, the eyes need to constantly adjust, to adapt to the strobe light, they will naturally feel eyestrain over a long time. As a symbol of modern civilization, since the people cannot do be separated with LED light fixtures, then we can only make efforts on healthy lighting and light pollution reduction.
LED lamps are flashing due to LED driver power supply problem
Most LED lamps are flashing, there is no national standard to make normative rigid requirements for this, only some of the developed countries customers have individual needs, which have not formed mainstream awareness and standards of the industry. The stroboscopic phenomenon is because the LED light source needs to be driven and must be rectified, and the rectified current frequency is twice the AC frequency, that is 100-120HZ, the lighting generally cannot be seen by eyes, but the camera (camera) viewfinder is also the frequency, so when the frequency cycle encounter, the strobe (ghosting, flashing) phenomenon will occur. This is not the problem of LED, but led power supply problem used by the lamp manufacturers.
The advantages LED driver power supply needs to have
The high-brightness lighting applications, such as offices, shopping plaza. In order to give full play to the advantages of LED lighting, LED driver power supply needs to have the advantages of high efficiency, high power factor, low-cost and long-life. Conventional LED drive method, such as current limiting resistors, the linear regulator and charge pump conversion control have lower efficiency, the switching type constant current power supply has high conversion efficiency, high power density, and control accuracy, which is particularly suitable for use as
of high-power LED light source. In the case of AC input, high power LED driver power is generally composed by conversion circuit and the drive circuit two parts. Wherein the converter circuit converts the AC power into DC, and achieve power factor correction (Power Factor Correction, PFCs), and the drive circuit uses a dedicated LED driver chips to provide constant current driver for LED. Since the LED has positive current-voltage characteristics, which must work correctly only in the DC voltage, so whether the LED is flicker all depends on whether the driving current of the LED drive power has a straight DC current. Solve the above problem, the LED lamps will not exist strobe.
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