Eyes do not need color cast! The new optical anti-blue light is the king
Blu-ray is one of the culprits causing eye fatigue
In the era of information explosion, the screen has become part of our lives, and the accompanying problems have followed. According to the data, among the total population aged over 5 years in China, the population of nearsighted people is about 450 million in 2012, of which the rate of nearsightedness in primary school is as high as 46%. Without effective policy intervention, by 2020, the prevalence of myopia in the population over 5 years of age in China will increase to around 51%, and the number of patients suffering from illness will reach 700 million. This is due to our long-term exposure to the screen.
The blue light emitted from the screen we touch every day can be said to be one of the culprits causing eye fatigue. There is already more reliable data support for Blu-ray damage at home and abroad. From 2013 to 2014, the Visual Health Laboratory of China National Institute of Standardization conducted a study on the effect of LED blue light on human visual fatigue. Nearly 600 human visual physiology experiments showed that shielding 15% of blue light is better than non-shielding of blue light. The visual fatigue of the testers was nearly 21% lower.
· Where does the screen blue light come from?
At present, most of the display devices we touch are basically LCD screens, and the LCD needs backlight support. The backlight source is composed of a large number of LED lamp beads. In a normal sense, we understand that the principle of liquid crystal light emission is that the white light emitted by the LED is irradiated on the liquid crystal module, and the three primary colors of RGB are dispersed so as to exhibit rich and colorful colors. These seem to have nothing to do with the harmful blue light we say, but we all know that harmful blue light comes from the LED lamp beads.
The white backlight produced by LED beads is not itself white
The white backlight produced by the LED lamp beads is not itself white, but the high-energy blue light to stimulate white fluorescence. The current LED lamp beads will use blue light to generate yellow light on the phosphor. After the yellow light is excited by the blue light, they shine together out of the LED, so we will see white light. Actually, this is just a mixture of blue and yellow colors. It's just compound light together, and harmful blue light comes from here.
What is Blu-ray?
We all know that light in the natural world consists of spectra of different colors, but different wavelengths visually present different colors. For example, light with a wavelength of 600-700 nm is what we see is red light, 500- At 600 nm, we see yellow light, and the blue wavelength is between 400 and 500 nm.
Blue light wavelength is relatively short
Physics studies have shown that the shorter the wavelength, the higher the energy and the stronger the penetration. The wavelength of blue light is relatively short, so people are very concerned about the harm of blue light to human eyes. At present, we are advancing towards an era in which "all things are displayed". Life has been inseparable from the screen. Televisions, mobile phones, and tablets have become electronic products that we must use every day. These LED-based screens, the peak spectrum of the light source is such a short-wave blue light, the longer the look, the greater the damage to the human eye.
Blu-ray specific hazards?
Harmful short-wave blue light has extremely high energy. Excessive exposure can even damage the visual cells, and the damage is irreversible. Blu-ray damage to the eyes is mainly manifested in three aspects. The first is that excessive blue light can cause retinal pigment epithelial cells to be insignificant or even die, damaging the structure of the eye.
Blu-ray brings many hazards to the eyes
Second, it will lead to the deepening of myopia or diplopia, causing visual fatigue. At the same time, excessive blue light will inhibit the secretion of melatonin, thus affecting people's sleep quality. If people lack of sleep, the degree of fatigue of the eyes will also increase, but also produce a variety of problems for the body, which is also considered the indirect effects of blue light.
How to effectively eliminate blue light?
· Several ways to eliminate blue light
The first method is also a common and relatively simple method, which is "adjusting the color temperature." We have found that eye-protection mode is used in mobile phones, televisions, and other display devices. The principle is to control the amount of blue light in the screen. This function can reduce the blue light to a certain extent, but we will find that the screen will produce a serious color cast, brightness and contrast will be reduced, the sharpness of text and pictures is also greatly reduced, if you look at a long time it will also cause eye damage.
Decrease Blu-ray by adjusting color temperature
The second method is to apply a film on the screen surface. For example, the current mobile phone will be equipped with an “anti-blue film,” and the actual effect is basically the same as the adjustment of the color temperature. At the same time, the quality of the blue light film is also uneven, and some may not even achieve the anti-blue effect. There is also a method of using a “polarizer”, which is similar to a film, except that it is between the backlight and the glass. By inserting a polarizer and a color filter to filter out harmful blue light, it also takes The lack of brightness and color.
Anti-Blu-ray film for mobile phone
The last method is currently the most advanced and also the most effective method. It starts from the "LED light source" and uses the chip optimization algorithm to smooth the spectrum of the light-emitting lamp beads, moving the blue light spectrum from 450 nm to 460 nm, thereby effectively The reduction of the generation of blue light has led to the suppression of blue light from its roots, and the elimination of harmful blue light can reach 80%. This anti-blue light technology has also brought this field to a new level.
Opto-optical Blu-ray protection through chip optimization algorithms
At present, this technology is jointly developed by the domestic Internet TV companies and the optoelectronic components and materials laboratories of the University of California in the United States. In the effective anti-Blu-ray, but also change the eye mode will cause the color cast of the drawbacks. At the same time, due to the blocking rate of harmful blue light reaching 80%, it can also make users facing the screen less vulnerable to some of the blue radiation, thereby reducing the probability of myopia. In times when the prevalence of myopia is so high, it is highly significant to prevent blue light fundamentally.
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