LED blue light on the issue of European restrictions

The "blue light" problem of electronic products has finally attracted the attention of the industry. On "Blu ray", if asked about the use of electronic products, they will say that blue light will make the eyes tired, so in order to prevent wearing a blue light. And if asked to monitor the technical staff, and sometimes they will coldly replied: Although there are many claims, but there is no evidence. If you go to the store, you will see the store under the banner to protect the eyes from LCD TV and LED lighting issued by the blue light damage to the blue light glasses and other ads. The eye doctor will say, people's eyes are "imaging" and "clock" two functions, blue light and the eyes have a great relationship. Some eye doctors have begun to warn people of the effects of blue light on the human eye.

For the electronics industry, it is important to have a thorough understanding of the problem. Just at this time, the international society to discuss the issue of blue light, "1st International of Blue Light Society" was held in Tokyo in June 2013. Here are some of the content published on the society, and review the past restrictions on the impact of electronic products to the human body. Hope to help you learn more about Blu ray.

First of all, to talk about the electronic products which emit light spectrum. Because there is no publicly available data, it may be difficult to understand, figure 1 gives the spectrum of white light bulb, LED and organic EL. In the 3 light source, LED uses blue and yellow fluorescent materials to produce white light, the problem is in the equivalent of the blue light wavelength (460nm) at the peak (blue peak). When the LCD backlight uses LED, the blue peak light intensity can be controlled, but it is difficult to change the peak wavelength. Therefore, the use of LED displays and lighting may be due to the blue peak and the impact on the user.

The meeting was held in calling for a professor of Department of Ophthalmology, Keio University tsubota a man under. Famous ophthalmologists, psychiatrists, electronic components, researchers, the European CIE (International Lighting Committee) and LED manufacturers from around the world, the relevant institutions and industry stakeholders at the meeting made a speech. Unfortunately, the display industry did not deliver a speech, but the theme and content of the meeting is worth listening to.

I do not have the basic medical expertise, can not do a detailed explanation, please forgive me, blue light is mainly the following two aspects of the problem. The author also mentioned earlier, the human eye has two important functions of imaging and clock. First of all, if the eyes are exposed to blue light, it is possible to damage the eyeball, which is the impact on the imaging function. Second, if the eye is constantly looking at the blue light from day to night, it may cause a circadian rhythm, which is about a day long period of time, which is a function of the clock. The Institute around these two points, from a number of angles to clarify the issue of blue light, the purpose is to prevent the future to leave a curse.

May affect the eyes of the "imaging", "clock" two functions

First of all, talk about the effect of blue light on the imaging function, mouse experiments show that if the eye over a long period of exposure to blue light, can not deny the initiation of age-related macular degeneration possibility. Age related macular degeneration (AMD) is a difficult disease and has begun to be treated with iPS cells. According to a speech published by ophthalmologists, the human retina, the focus of the imaging part of the diameter of only about 0.35mm, which has a diameter of 1.5 ~ 2mm in the presence of a material called lutein. Lutein is the role of blocking blue light, protect the retina, thereby protecting vision. If excessive exposure to blue light, macular damage will result in age-related macular degeneration.

There is a speech pointed out that the human eye is the life of 50 years, from the age of 40 lens turn yellow, can automatically block blue light, more so after 40 years of suffering from cataract lens. On the contrary, the young crystal clear, the ability to block the blue, blue light may be seriously affected.

Here to talk about the impact of blue light on the clock function, Blu ray was originally an indispensable human light. The sun will contain more blue, every day the sun rises, shining blue light, the human began waking up activities, the sun, blue light disappeared, reduce melatonin in the human body, human induced sleep.

But in recent years, with the popularity of electronic products and LED lighting with LED backlight, people's eyes are exposed to blue light day and night. This is likely to disrupt the circadian rhythm of life based on human functioning.

Recently, researchers at the Keio University, Japan, said: "researchers have recently discovered a group of cells called" third kinds of visual cells "that have an absorption peak at the wavelength of blue light, and found that the cells control the circadian rhythm. "It's no problem to absorb a lot of blue light during the day, but you can't go through the blue light at night. By the time he continued to gaze at the blue light at night, the body would have mistaken for 'day'".

It will take a long time to verify the long-term impact of Blu ray, and now users of electronic products have begun to wear anti blue glasses. Professor Sliney of the Johns Hopkins University pointed out in the society: "while wearing glasses in the blue light proof is not required, but there is no reason to deny the user for insurance purposes and equipped with anti blue glasses. "

Europe is ready to introduce restrictions

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