The development of intelligent lighting is rampant, but lighting products often have stroboscopic problems after additional functions such as dimming and communication. Strobe will bring health and safety problems, and international standards for strobe have also been introduced. However, the standards of different departments have different focuses, and the evaluation indicators are also very different. This paper briefly reviews the stroboscopic evaluations of current international organizations and recommends efficient detection and evaluation methods.
First, what is strobe
Strobe is the fluctuation of the luminous flux of an electric source at a certain frequency. The distribution of the fringes can often be found by aligning the light source with a mobile phone, which is caused by stroboscopic light. Some degree of strobo does not attract attention and there is no physical discomfort; but some strobes are really a problem. As early as the 1990s, a large number of studies have found that stroboscopic light sources are closely related to neurological diseases such as migraine, headache, autism, visual fatigue and discomfort, which can cause illusions in the human eye and trigger ACCIDENT. Don't underestimate the strobe, the impact of different frequencies and fluctuation depths on people is different!
1. Visible strobe
The human eye is a very complicated system, and the individual differences are very large. For most people, the light flicker below 80 Hz can be perceived. At this time, the human eye can perceive the change of light and dark, and the flicker frequency is below 80 Hz. Visible flicker. It can be seen that the strobe is unacceptable for normal lighting or display.
Human eye sensitivity to stroboscopic weighting function
2. Stroboscopic effect
For strobes above 80 Hz, the human eye is not easy to detect, but it has a greater impact on the spatial perception of the human eye. For example, a moving object is seen as a series of still images, the Stroboscopic effect. Due to the stroboscopic effect, people have an illusion, and it is very dangerous to think of some fast-moving devices as slow or even stationary.
Stroboscopic effect
Illusion of machine operation caused by stroboscopic effect
3. Phantom phenomenon
Similarly, when the flickering frequency of the light source is at 80 Hz-2 kHz, and the object in the environment remains stationary, when the human eye moves in position or direction, the stationary light source will have an extended light spot of the system, called a phantom phenomenon, such as a taillight of a car. Or scan the outdoor LED display .
4. Strobe hazard
Light source stroboscopic has a close relationship with migraine, headache, autism, eye fatigue, blurred vision and many other neurological diseases. Studies have shown that 3-70Hz low-frequency scintillation light source may cause photosensitive epilepsy for some people; it is believed to cause headache and migraine for 100Hz flicker frequency; for 120Hz frequency scintillation light source may affect people's emotions, such as boredom, anxiety, etc. . The visual illusion caused by the stroboscopic effect and the associated mechanical motion is very dangerous in industrial settings. Therefore, accurate measurement and evaluation of the stroboscopic characteristics of lighting products is directly related to people's health problems and needs to be solved.
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