StaJim Knowledge Aug 24,2022 02:18 298 0
Original author: Stage Lighting
LED display has broken the limitations of traditional screens, and has prominent advantages in commercial, performing arts, stage lecture halls and other places and has been rapidly and widely used. LED display types and brands are many, the display effect is uneven, the gap span is obvious, there is no lack of defective products, not only poor effect will cause huge damage to the eyes. Damage eye invisible one of the culprits: stroboscopic What is a stroboscopic? LED display, is through the LED light on and off to refresh the picture, so as to image. LED lights are lit and off line by line, which will cause each line of beads on the screen to switch between the luminous state and the black state repeatedly. At lower frequencies, the switch between light and dark can be obviously detected by the naked eye, so as to sense the abnormal flicker of the screen body, which is called stroboscopic. Although the strobe is a phenomenon accompanied by the working principle of the LED display, the strobe of different frequencies can cause great or small damage to the human eye! Visible stroboscopic The human eye is a very complex system with large individual differences. The vast majority of people can perceive light flicker below 80Hz. At this time, the human eye can obviously perceive light and dark changes. Visible strobe is a condition that is unacceptable to normal lighting or display.
Stroboscopic effect It is not easy for human eyes to detect the Stroboscopic above 80Hz, but it has a great influence on the spatial perception of human eyes. For example, the moving object is regarded as a series of still images, that is, the stroboscopic effect. Due to the stroboscopic effect, people can create the illusion that some fast moving devices are moving slowly or even stationary, which can be extremely dangerous.
What effect does stroboscopic have on health? Stroboscopic light can stimulate the human visual system and cause discomfort. Studies have shown that the low-frequency flicker light source of 3-70hz may cause photosensitive epilepsy in some people; When the frequency is greater than 100Hz, human eyes can not feel flicker, but it will still cause eye fatigue, headache and other symptoms. Long term viewing and use can easily lead to problems such as reduced visual efficacy, blurred and decreased vision, distracted attention and photosensitive epilepsy. According to the research and relevant standards of authoritative testing institutions at home and abroad, the health risk is in a low range when the minimum stroboscopic standard of LED light source is above 1250hz; In order to achieve the completely harmless effect on human health, the stroboscopic frequency needs to be above 3000hz. |
