LED lighting goes "private customization"

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 lighting industry continues to increase, LED will gradually replace traditional lighting, and the era of intelligent control is approaching.

Tsinghua University School of Architecture, Dr. Zhang Xin believes that LED and innovation are inseparable, LED can adjust the spectrum, adjust the intensity, through the study of each individual's spectral curve, can be targeted to design spectral values ​​that meet the needs of specific objects, what the user needs What kind of light can be designed with this type of light, that is, the light can be customized.

LEDs make light personal

The history of human lighting research dates back more than a hundred years. The first thing to do is to study the eyes of people of different races, ages, and genders around the world, and use a similar normal distribution curve to present the human eye levels around the world. Then, according to the convergence of the human eye's response to light, scientists have found suitable materials—silicon photovoltaic cells and selenium photovoltaic cells. Subsequently, humans began to study the standard illumination of indoor lighting.

LED lighting goes to "private custom" LED to make light become material

The breakthrough in LEDs is related to the first thing in human lighting research. Zhang Hao said, “The response of the human eye to light has a global average. For example, according to the American lighting standard, if the child uses it is 150, the middle-aged 300, the elderly is 600, in our country is still unified with 300 In reality, each person has a different spectral response curve for each person, but now the same curve is applied to everyone, measured by the same lux meter to get the same lux value."

He pointed out that people and plants need no difference in light, but with spectroscopy, agricultural experts can study the response of each crop under different spectra and analyze what kind of spectrum is more suitable for plants. Grow. With the LED dimming, changes in the trajectory, intensity, and spectrum of the sun can be accomplished, thereby providing an appropriate lighting environment for different lighting conditions required for the growth of each crop, which can shorten the crop growth cycle or provide yield per unit area.

By the same token, if you can measure each person's different spectral needs, the combination of LED light sources and lamps, so that the lamp has a wide-spectrum adjustment function, you can allow users to use in the selection of the most appropriate light according to demand.

“Some people are now starting to do medical lighting, light ecology, researching human response to the spectrum, and at least distinguishing what kind of spectrum different patients need.” Zhang Jian pointed out that these related studies are inseparable from the support of lighting companies. The company has not paid attention to such basic research, but international lighting giants such as Philips have already started to study it.

Lights need to be automatically analyzed

The effects of digitalization and intelligence on lighting are extremely far-reaching, but in Zhang Jian’s view, lighting has not really ushered in intelligence. At present, domestic intelligent lighting has not yet risen to the level of automatic analysis. It is only based on changes in people and changes in the scene to open different lighting intensities.

Illumination is related to vision. Vision is related to human eyes and pupils. Human eyes observe the outside world and feedback information to the brain. The amount of data generated by this process is very large. In fact, if we can connect lighting with these data, it will greatly enrich the application space for lighting. Of course, this requires big data and high-speed computing as technical support.

Zhang Hao, for example, said that when a person went to the supermarket to buy beer, how did he find the bottle of beer he wanted? First of all, his eyes will scan among brands and eventually focus on one brand. During this scan time of about 3 seconds, the eye's transition at different focus points is a big data. This data can be captured by the eye tracker. If these data can be linked with the data of the lamp, that is, if the lamp knows how to look and see what people enter into the supermarket, the lighting in the spot where the human eye is focused can be made brighter. Vision is closely linked together.

Talking about the future of lighting, Zhang Hao analyzed that after the cost is not an issue, lighting will surely go toward exclusive customization, and then it will be automatically analyzed. People do not need to participate in the lighting analysis process. He believes that people are actually participating in this control process through IPAD, mobile phone or wireless sensor dimming. In fact, the best control is to “do not control” and achieve the effect of “people’s free lives and light follows you”. .