Early fluorescent tubes all had flicker, The so-called flicker means that the brightness changes with the change of the AC signal at 50Hz. There is a sense of flicker, and the eyes are prone to fatigue after a long time. The light source has not been processed, and it is directly illuminated, which is harmful It is relatively large. However, the birth of flicker free led tube has solved this problem.
1. In the early days, the most obvious thing was that the strobe was more serious in the TV. But now with the progress of technology and technology, this problem has been solved. Through electronic technology, the increase in frequency and pixels has been well solved.
2.In the photography industry, the requirements for light sources are more stringent. If a non-strobe led tube is used, the photos or images taken will be clearer and more stable. Compared with the previous ones, the effect difference is very obvious.
3. Flicker-free LED tubes are more widely used in schools. Schools use fluorescent tubes for lighting. In the early days, they were all ordinary fluorescent tubes. The flicker was serious. Students are prone to eye fatigue during learning. Myopia is more serious. One generation is unfavorable. Therefore, the country expressly stipulates and puts forward strict standard requirements. Therefore, when changing places such as classrooms/libraries, no flicker is required. Even when returning home, when doing homework, most of them choose no frequency flickering led lights.
How is the non-flicker LED tube made? This is due to the advancement of modern electronic technology. Usually the structure of the LED tube is the shell + the LED panel + the LED power supply. The power supply is the core of the tube. Work hard on the power supply to achieve a constant output current and no flicker, so even though the AC power is input, it becomes a stable and flicker-free drive source after being processed by a constant current source, and then drives the LED lamp chip to emit light without flicker. The flickering led tube was born. Please consult Langte for details.
About no flicker
Most desk lamps use electronic ballasts to increase the frequency. They can only be called high-frequency flickering rather than real flicker free desk lamps.
Traditional fluorescent lamps are directly powered by 50Hz alternating current, and the strobe is 100Hz. When shooting with a digital camera, water ripples will appear because of the different sampling frequencies. The LED lamps are powered by a DC power supply, and the light emitted by the light source will also be in the form of DC. From a physical point of view, the fluctuation of its light emission is indeed far lower than that of a light source operating with AC current. However, the input power supply is still in the form of AC, so it is difficult to completely avoid the AC ripple passing through the LED light source, so there will be flicker when the LED lamp is photographed with a digital camera. Can the camera flicker to determine that it will harm the human eye? In fact, the human eye’s sensitive frequency to light fluctuations is in the low frequency range. For example, the frequency of warning lights such as ambulances is about 8-10 Hz, which is the most eye-catching. Discomfort.
①The working principle of most eye protection lamps is to increase the low frequency flicker to the high frequency flicker. This kind of eye protection lamp uses a frequency conversion electronic ballast, and the electric frequency is increased from 50Hz to 5500Hz to reduce the flicker. It uses three primary color phosphors. The glare effect is reduced, the light is soft and not dazzling, so that the human eye does not feel the discomfort of flicker, so as to reduce eyesight fatigue. The flicker effect is a test indicator of all fluorescent tubes: the less the flicker, the better the lighting effect.
②There is also a very few working principle of the eye protection lamp: first change the alternating current to direct current, and use the direct current to light the lamp, and it will not flicker at all. It is truly flicker-free, and the light is close to natural light when used, very bright, but not dazzling at all. Soft, greatly relieves eyesight fatigue. Compared with other types of eye protection lamps, electromagnetic radiation has no radiation. The DC eye protection technology has passed the patent certification granted by the State Intellectual Property Office, and of course the price should not be low.
