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"Killer" hidden behind healthy lighting by Luminhome Lighting






"Killer" hidden behind healthy lighting by
Article Posted: 10/12/2017
Article Views: 309
Articles Written: 8
Word Count: 1182
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"Killer" hidden behind healthy lighting


 
Books,Electronics,Health
With the LED technology rose to a bottleneck, the product quality has been mentioned, the industry is still talking about the light flux and light effect two years ago, the concept of abnormal hot in recent years, the healthy lighting intelligent lighting. We talked about healthy lighting, what kind of lighting is healthy? LED lamps, what factors will affect the health of the scenes become "killer"? This special issue, we will be the representative product of health lighting -- eye lamp as an example, to explore what kind of light together with everybody is healthy light.

Shortly after Nakamura Shuji won the Nobel Prize, the industry broke the question of the high content of blue light in LED products, which caused panic at one time. The human eye, as the most direct contact with light, is the most sensitive organ, while the table lamp is close to the human eye for a long time. The concept of eye protecting table lamp emerges as the times require. "The natural light is the healthiest," says R & D director of the Shenzhen Kang Feng Industrial company. The main drawbacks of artificial light are blue light, glare, strobe, etc., and long-term use can threaten the visual health of the eye.

Blue light hazard

Blue is a kind of high energy visible light, can directly penetrate the cornea and lens, direct the macular region, accelerate the oxidation of macular cells caused by chemical damage to the retina, retinal damage in children is more serious, Kang Mingsheng D responsible person said, the harm is mainly manifested in the cause of myopia, cataract eyes and macular pathology and body rhythm the disease harm, has been related to medical research shows that in three aspects:

One is the loss of structure, high content of blue light LED lamp can cause atrophy of the retinal pigment epithelium and even death, lead to decreased vision and even lost completely, and it is a kind of irreversible damage, can also cause macular degeneration.

The other is eye fatigue. Because the wavelength of the blue light is short, the focal point is not at the center of the retina, but rather near the retina. The LED lamp light ratio is too high, will let users eye long time in a state of tension, thereby causing visual fatigue, may lead to myopia, diplopia, easy to read serial, inattention and other symptoms.

Third, sleep is not good, blue light will inhibit the secretion of melanin, and melanin is an important hormone affecting sleep, the current known role is to promote sleep, adjust the time difference. Long hours of reading with a high light LED lamp can lead to poor sleep and even insomnia.

LED lamp long time contact eye, especially the intelligent mobile phone popularity, users of the vast majority of young students, if not in accordance with the physiological rhythm of light when people choose ingredients and quality, it is easy to let the user to produce visual fatigue, and may even cause irreversible damage to eyes. Kang Mingsheng research and development director said, LED eye care desk lamp should try to control the color temperature in 4000K, to reduce the blue light content, and strictly control the color rendering index.

Strobe

A strobe, the simplest definition refers to the fluctuating switching period of light. For example, in China, a current is passed through the frequency of the alternating current transmission 50Hz, power supply voltage of the lamps in the switching period in the form of sine wave in the peak to trough swing between. Therefore, may produce 2 times to supply frequency flicker, which is 100Hz. If there is no suitable electronic circuits, such as ballast, drive or power, can produce stroboscopic light source.

CCTV 315 party this year, LED lamps flicker problem of field exposure, caused a great disturbance. The stroboscopic problem also can not be overlooked, will cause a variety of damage to the human body, the biological and medical research has been related to that:

It may cause brain cell damage. According to researchers, through the observation of EEG findings, even if the environment light strobe has been quick to let people can not detect, retinal organisms can still tell the frequency of 100-160Hz, even up to 200Hz and respond to light.

May affect reading and vision. Strobe will affect eye movements in reading the text, LED lamp stroboscopic will seriously affect the users' attention, and more easy to produce visual fatigue.

The fluctuation of stroboscopic problems from the AC grid, so the LED eye lamp in the circuit design must be considered the flicker problem. LED eye lamp long time close contact with the eye, easy to let the user generated stroboscopic serious visual fatigue, and even affect the vision, the enterprise shall adopt high performance driving and capacitance, the constant current circuit, isolated DC voltage output, avoid the lamp flicker problem.

Unified glare value

UGR refers to the psychological parameters measurement in visual environment indoor lighting device of light emitted by the subjective discomfort reaction of the human eye, its value can be calculated according to the provisions of CIE conditions of UGR formula, to sum up in a word is not dazzling light.

Kang Mingsheng D responsible person said that the glare refers to the unreasonable distribution of brightness due to vision, or the existence of extreme brightness contrast in space or time, resulting in visual comfort and reduce the visibility of objects in visual conditions, is simply not dazzling light. Flare is one of the important causes of visual fatigue, the LED lamp lights if too harsh, may cause discomfort or disgust, visual impairment. LED lamp eye contact eye a long time, it is particularly important to control glare value.

UGR enterprises and consumers is the most easily overlooked "invisible killer". On the one hand is not included in the standard UGR compulsory certification category, on the other hand, enterprises in the production process, more products in other aspects, glare control values did not cause enough attention.

From the practical application of products, some eye concept based LED lamp began to focus on the UGR, and control parameters of UGR in lamp design and production process. Kang Mingsheng D is responsible for that, many manufacturers may realize unhealthy light damage to the eyes, still remain in the most superficial lighting needs, they just pay attention to light, just bright.

Summary

Whether it is blue, strobe or glare, affected by the first human visual organ, then let a person produce negative psychological and emotional, a long time is more likely to cause visual organ and tissue damage and even insomnia. Kang Mingsheng D responsible person said that the eye lamp should be through reasonable design, so that the light source products of all kinds of parameters close to the user's visual needs, create a comfortable reading environment. It is the product attributes according to the characters of natural light to give the lamp close to natural light, lamp Kang Ming Sheng produced comparable to natural light.

Related Articles - Blue light hazard, Strobe, Unified glare value,







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