The strobe of LED light source and luminaire is mainly derived from inferior driving power supply, such as switching power supply with high resistance and step-down power supply and high ripple. Check and discriminate whether the LED light source and the luminaire have stroboscopic light. The simple method is to turn on the camera and camera function of the mobile phone. The electronic viewfinder is the lens that is aimed at the LED light source to be observed. The framing picture accounts for more than 2/3 of the area of the mobile phone screen. It is to observe the LED light source at a close distance. If the light source on the mobile phone LCD screen has obvious black stripe scrolling or light and dark changes, it can be determined that there is stroboscopic. Strobe, the frequency of flicker, is a periodic, repetitive flash that includes visible strobes and imperceptible strobes. The frequency flashing of 50~200Hz is visible to the human eye and may be very sensitive to children and young people. The high-frequency flicker, because of the inertia of the human eye, can not be felt, that is, the undetectable stroboscopic, therefore, can be used for optical communication.
The typical LED light source strobe is shown in Figure 1. This is taken by the netizen with a mobile phone. The picture is a stroboscopic LED light source. You can see the obvious rolling black bar, which proves that the LED light is strobed. picture is a strobe-free LED light, the screen is clear and clean. The distributor of LED lighting products is to distribute high quality and good products that are harmless and reassuring. Buyers must purchase cost-effective LED lighting products without stroboscopic. Especially the LED track lights in retail stores.
LED light sources and lamps use different drive circuits, the effect is not the same. Some drive circuits have stroboscopic, such as RC capacitors; some are strobo-free, such as a well-switched constant-current power supply. Pust Lighting always chooses a strobe-free power supply to ensure the production of high-quality, cost-effective track lights without stroboscopic.