With the gradual advancement of urban construction, whenever night falls, when the lights are first, commercial and downtown areas, large-scale LED screens with frequent changes, jumps, and flashing of various color advertisements can be seen everywhere. The radiant LED lights can certainly dress up the city. It lights up the street, but it is accompanied by light pollution that affects people's health.
A while ago, many media reports on the hazard of blue light caused widespread concern about the light biosafety of lighting products. For a time, people could not help but talk about the "blue" color change. Due to its rich blue light spectrum, LEDs have been pushed to the forefront by public opinion. So, how big is the harm of blue light? Does the blue light contained in the LED cause harm to people?
The Shanghai Quality Supervision Bureau specially organized the testing organization to carry out risk monitoring on some LED lighting products, and collected 27 samples from different channels for blue light hazard testing. Yu Anqi, deputy director of the National Electric Light Source Quality Supervision and Inspection Center (Shanghai) and chairman of the Shanghai Lighting Society, conducted a detailed analysis of the LED blue light hazard test results.
PART1 trembles
Little friends look at what is blue light
The research report of Professor RHW Funk of German ophthalmologist pointed out that when "inappropriate light" continues to illuminate our eyes, it will cause dysfunction, especially the three primary color lights, computer screens, etc. Regular high-energy short-wave blue light, these short-wave blue light has extremely high energy, can penetrate the lens to the retina, causing photochemical damage to the retina, directly or indirectly causing damage to the cells in the macular area.
Blue light is high-energy visible light with a wavelength of 400-500 nm.
Harvard University research shows that if you use ipad, smartphone or laptop before going to sleep, they emit enough light to stimulate the brain, making the brain excited, affecting the law of the biological clock, it takes too long to fall asleep, and wake up many times during sleep. Come to wait for insomnia symptoms. The human body begins to secrete a large amount of melatonin at nine or ten o'clock in the evening, and the amount of light secretion is greatly reduced, and this hormone is also important for anti-cancer function.
At the same time, sleep well does not mean that all organ systems are prone to dysfunction. Studies have found that people with insufficient sleep or low quality sleep have significantly reduced immune function, responsiveness, memory and coordination, and have an increased risk of diabetes, heart disease, cancer, obesity, indigestion, constipation, depression and other diseases.
The white light emitted by the light source of the LED lamp can form a blue light excitation phosphor mainly by a wavelength of 450 to 455 NM, wherein the lower the wavelength, the stronger the firing ability. Usually, the factory wavelength of the LED light source is controlled within 500 NM, generally 450-455 NM or 455-460 NM, which are the most radiation-damaged sections. If the wavelength becomes large, the ability to excite the phosphor decreases, and the luminous efficiency decreases. In order to pursue brightness, the manufacturer usually strengthens the blue light intensity of the LED light source. If the human eye looks at such a light source for a long time, it is inevitable that the eye will be damaged by blue light.
In addition, the longer the LED lamp is lit, the faster the phosphor in the light source decays, and as a result, the light in the blue light band that is in contact with the human eye becomes more and more intense, thereby causing damage to the human eye. Therefore, long-term work under the LED light containing blue light, it is easy to cause dizziness, uncomfortable feeling, and even cause eye damage, so the chance of suffering from eye disease will be improved. Remind, don't let your eyes look at the bright LED light source for a long time to avoid eye damage.
Therefore, for normal people, blocking long-time exposure to blue light is the most effective way to reduce damage, and the use of anti-blue light glasses can effectively solve this problem. Ordinary anti-pastel glasses can only filter ultraviolet rays and certain electromagnetic radiation. Cannot filter blue light. Special anti-blue glasses not only effectively isolate UV and radiation but also filter more than 90% of blue light.
Car Mobile Charger,Car Charger,Iphone Car Charger,Portable Car Charger
Ninghai Yingjiao Electrical Co., Ltd. , https://www.yingjiaoadapter.com