Application of Blue Light Cut Filter
Shortwave blue light is light with high energy between 400 nm and 480 nm. This wavelength of blue light increases the toxin content in the macular area of the eye, posing a serious threat to the health of the fundus. Blue light causes blindness. At present, an effective solution is to apply movies to television. The anti blue light coating technology is mature, low-cost, and can effectively prevent the penetration of blue light.
In particular, it is pointed out that blue light is not all harmful blue light. The truly harmful blue light is between 400 and 440 nanometers. Blue light between 480 and 500 nanometers has functions such as regulating biological rhythms, sleep, emotions, and memory, but it is beneficial to the human body. Whether shortwave blue light can cause harm to the human eye depends on the intensity and duration of exposure. When the light exposure reaches a certain level and lasts for more than two hours, it may damage the retina.
Blue light irradiation can generate free radicals, leading to a decrease in retinal pigment epithelial cells. The decrease in epithelial cells will result in a lack of nutrition for photosensitive cells, leading to visual impairment, which is irreversible.
In the era of rapid development of science and technology, we can no longer leave computers, laptops, tablets and other digital products, and can not leave home to work, live and play. Everything can be displayed through the Internet and computer screens.
The harm of blue light to the human eye mainly manifests as pathological damage to the eyes and damage to human circadian rhythms, leading to myopia, cataracts, and macular disease.
1. Blue light can cause macular degeneration. The lens of the human eye absorbs some blue light to form cataracts, and most of the blue light passes through a lens, especially in children, which is transparent and cannot resist blue light, which is more likely to cause macular disease and cataracts.
2. Blue light damages secondary visual fatigue: Due to the length of blue light, the focal point is not at the center of the retina, but near the retina. It should be clearly seen that the eyes are in a state of tension for a long time, causing visual fatigue. Long term visual fatigue may lead to deepening myopia, diplopia, easy serialization of reading, lack of concentration, and other symptoms, affecting people's learning and work efficiency.
3. Blue light harms third sleep: Blue light can inhibit the secretion of melatonin, which is an important hormone that affects sleep and promotes sleep and regulates jet lag.
Organic OLED TVs have become a new choice in human life. Organic Light Emitting Diode (OLED), also known as Organic Light Emitting Diode (OLED), is a display technology OLED organic TV screen panels can automatically emit light for each pixel without backlighting. OLED organic emitter has 331700 solid particles and can automatically emit light. As long as the voltage is input into the electrode, the excitation layer can generate the desired color light. The blue light band is mainly concentrated at 460nm, while harmful blue light exists between 400nm and 450nm. Blue light has a relatively high energy and can cause serious harm to the human eye, so it is not suitable for prolonged viewing
Causing glare
Due to the relatively high energy of short wavelength light, the main reason for glare is the high scattering rate of small particles in the air. Patients with retinal diseases and ophthalmic surgeries (such as excimer surgery and cataract surgery) are highly sensitive to light and experience abnormal glare, which is also caused by short wave blue light.
visual fatigue
Visible light focuses differently in the eyes, resulting in different focal lengths between the two focal points. The incidence of blue light increases the focusing distance difference and visual blur. The reason is that the focus of blue light is not on the retina, but between the retina and the crystalline lens. Increase the focus distance between the eyes.
Differently, blue light between 435 and 440 nanometers causes the greatest damage to the eyes, and as the wavelength increases or decreases, blue light causes the greatest damage to the eyes. Although the peak spectral energy of LED light sources seems to be in the blue light band, the most harmful 435 nm band is lower than that of traditional CCFL displays, so the blue light hazard of LEDs is smaller than that of traditional CCFL displays. There are many sources of blue light in daily life, besides bathrooms, flat panel displays, LED neon lights, fluorescent lights, cathode tube backlit displays iPad、 Large screen phones, etc., as well as background light sources. The light source stimulated by strong electron flow contains abnormal high-energy short wave blue light, which can affect children's retina. Long term direct gaze should be avoided.
To prevent the harm of CCFL blue light, the most important thing is to avoid prolonged direct eye contact with the surface of the light source. For infants and elderly people with weak protective awareness at home, measures should be taken to prevent light sources from directly entering the eyes.
Research has shown that blue light is abundant in LED lights, computer monitors (including CCFL and LED), mobile phones, digital products, liquid crystal screens, bathrooms, and other lighting sources, but it only causes damage when the sun is shining brightly.