In the field of lighting, LED as a new type of green light source has attracted worldwide attention. As the penetration of LED lighting in the entire lighting industry continues to increase, LED will gradually replace traditional lighting, and the era of intelligent control is coming. Dr. Zhang Wei from Tsinghua University School of Architecture believes that LED and innovation are inseparable. LED can adjust the spectrum and intensity. By studying the spectral curve of each individual, you can design the spectral values ​​that meet the needs of specific objects. What do you need? What kind of light can be designed with the kind of light, which means that the light can be customized. LEDs make light personal. The history of human lighting can be traced back to a hundred years ago. The first thing is to study the eyes of people of different races, ages, and genders around the world, and use a normal distribution curve to present the human eye level around the world. Then, according to the convergence of the human eye's response to light, the scientists found suitable materials for silicon photocells and selenium cells. Subsequently, humans began to study the standard illumination of indoor lighting. The breakthrough of LED lighting towards private custom LEDs to turn light into material LEDs is related to the first thing in human lighting research. Zhang Wei said that the human eye responds to light with a global average. For example, according to American lighting standards, if the child uses 150, the middle-aged 300, the elderly is 600, and in our country it is 300. In fact, each person has a different spectral response curve, but now The same curve is applied to everyone, and the same lux meter is used to measure the same lux value. He pointed out that the light that people and plants need is no different in the past, but with the spectral analysis technology, agricultural experts can study the response of each crop under different spectra, and analyze what kind of spectrum is more suitable for plants. Growing. LED dimming can complete changes in sunshine trajectory, intensity, and spectrum, so as to provide an appropriate lighting environment for different lighting conditions required for each crop growth, which can shorten the crop growth cycle or provide unit area yield. By the same token, if you can measure the different spectral needs of each person, through the combination of LED light source and luminaire, the luminaire has a wide-spectrum adjustment function, which allows the user to select the most suitable light according to the needs in use. Now people are starting to do medical lighting, light ecology, research people's response to the spectrum, at least to distinguish what kind of spectrum different patients need. Zhang Wei pointed out that these related researches are inseparable from the support of lighting companies. Domestic companies have not paid attention to such basic research, but international lighting giants such as Philips have already started research. Lighting needs to be automatically analyzed. The impact of digitalization and intelligence on lighting is extremely far-reaching. However, in Zhang Wei’s view, lighting has not really embraced intelligence. At present, domestic intelligent lighting has not yet risen to the level of automatic analysis, but different lighting intensity is turned on according to changes in people and changes in scenes. Lighting is related to vision, and vision is related to human eyes and pupils. The human eye observes the outside world and feeds information back to the brain. This process produces a very large amount of data. In fact, if the lighting can be linked to these data, it will greatly enrich the application space of the lighting. Of course, behind this, big data and high-speed computing are needed as technical support. For example, Zhang Wei said that when a person goes to the supermarket to buy beer, how does he find the bottle of beer he wants? First of all, his eyes will scan between many brands and eventually focus on a brand. During the scan time of about 3 seconds, the eye's jump at different focus points is a big data, which can be captured by the eye tracker. If the data can be linked with the data of the lamp, that is to say, if the lamp can know what to look at and see when the person enters the supermarket, then the light can be made brighter in the place where the human eye is focused, so that the light and the person The vision is closely linked. Talking about the future of lighting, Zhang Wei said that after the cost is not a problem, the lighting will definitely go to the exclusive customization, and then automatically analyze, people do not need to participate in the lighting analysis process. He believes that through IPAD, mobile phones or wireless sensor dimming, in fact, people are participating in this control process, in fact, the best control is not to control, to achieve the free life of people, the light followed your bright effect.
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