LED makes light personalized

In the field of lighting, LED, as a new type of green light source, has attracted worldwide attention. As the penetration rate of LED lighting in the whole lighting industry continues to increase, LED will gradually replace traditional lighting, the era of intelligent control is coming. Dr. Zhang Xin from the School of Architecture of Tsinghua University believes that LED is inseparable from innovation. LED can adjust spectrum and intensity. By studying everyone's spectrum curve, the spectral values that meet the needs of specific objects can be designed in a targeted manner. Users can design what kind of light they need, that is, the light can be customized. LED makes light Personalized. The history of human research on lighting can be traced back to 100 years ago. One thing is to study the eyes of people of different races, ages and genders around the world, and use a curve similar to normal distribution to present the human eye level around the world. Then, scientists found suitable materials for silicon photocells and selenium photocells according to the convergence of human eye response to light. Subsequently, human beings began to study the standard illuminance of indoor lighting. LED lighting moves towards private customization LED to turn light into materials the breakthrough of LED is related to the research of human lighting. Zhang Wei said that the human eye's response to light has an average. For example, according to the lighting standards of the United States, if children use 150, middle-aged people 300, the elderly are 600, and 300 is still used uniformly in our country. In fact, everyone has different spectral response curves for everyone, but now the same curve is applicable to everyone, measured by the same lux value obtained by the same illuminometer. He pointed out that there was no difference in the light needed by people and plants in the past, but with spectral analysis technology, agricultural experts can study the response of each crop under different spectra, analyze what kind of spectrum is more suitable for plant growth. Through LED dimming, changes such as Sunshine trajectory, intensity and spectrum can be completed, thus providing an appropriate lighting environment for different lighting conditions required for the growth of each crop, can shorten the crop growth cycle or provide yield per unit area. By the same token, if the different spectral requirements of each person can be measured, the lamp can have a broad-spectrum adjustment function through the combination of LED light source and lamp, it allows the user to select the appropriate light according to the needs during use. Now some people are starting to do medical lighting and light ecology to study people's response to spectrum, at least to distinguish what kind of spectrum different patients need. Zhang Xin pointed out that these related researches are inseparable from the support of lighting enterprises. Domestic enterprises have not yet paid attention to such basic research, but international lighting giants such as Philips have already begun to study. Lighting needs to be analyzed automatically. Digitalization and intelligence have a profound impact on lighting. However, in Zhang Xin's view, lighting has not really ushered in intelligence. At present, the domestic intelligent lighting has not risen to the level of automatic analysis, but only opens different lighting intensities according to changes in people and scenes. Lighting is related to vision, and vision is related to human eyes and pupils. Human eyes observe the outside world and feed back information to the brain. The amount of data generated during this process is very large. In fact, if lighting can be linked with these data, it will greatly enrich the application space of lighting. Of course, this requires big data and high-speed computing as technical support. For example, Zhang Wei said that when a person goes to the supermarket to buy beer, how did he find the bottle of beer he wanted? First of all, his eyes will scan among many brands and eventually focus on one brand. During the scanning time of about 3 seconds, the jump of eyes in different focal points is a big data, which can be captured by eye tracker. If these data can be linked with the data of the lamp, that is to say, if the lamp can know how people look and what they look after entering the supermarket, the light can be brighter at the place where the human eye focuses, in this way, light and human vision are closely linked. Talking about the future of lighting, Zhang Xin analyzed that after the cost is not a problem, lighting will definitely go to exclusive customization, and then it will be analyzed automatically. People do not need to participate in the analysis process of lighting. He believes that people are actually participating in this control process through IPAD, mobile phone or wireless sensor dimming. In fact, a good control is not to control, so as to achieve a free life, light follows your bright effect.