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Looking back on 2017, many technologies in the LED industry have achieved breakthrough development. Now, the OFweek Semiconductor Lighting Network has compiled a number of LED-related new technologies and new application information from all over the world. We hope that everyone can learn from the application of creative nutrients to create more excellent products. Technology is a powerful driving force for the rapid development of the LED industry, and it is also the strength and hardship of enterprises on the world stage. Under the increasingly fierce competition in the market economy, the LED industry can only achieve better development if it continuously promotes technological innovation. Looking back on 2017, many technologies in the LED industry have achieved breakthrough development. Now, the OFweek Semiconductor Lighting Network has compiled a number of LED-related new technologies and new application information from all over the world. We hope that everyone can learn from the application of creative nutrients to create more excellent products. Key technologies and system integration of high-efficiency and low-energy LED intelligent plant factory The key technology and system integration of high-efficiency and low-energy LED intelligent plant factory completed by Yang Qichang and Wei Lingling won the second prize of 2017 National Science and Technology Progress Award. After 12 years of painstaking research, Professor Yang Qichang's team has achieved many original results in plant plant light source adaptation theory and methods, light efficiency and energy efficiency improvement, nutritional quality control and multi-factor collaborative management and control technology. It has laid the dominant position of China in the international arena. The key technologies that have been broken include: Firstly, the concept of plant light formula is proposed and its theoretical basis is clarified, and LED energy-saving light source based on light formula and its light environment control technology are created. Based on the response characteristics of plant photosynthesis to different spectra, the concept of plant light formula was first proposed, and the light formula optimization parameters of typical crops at different growth stages were constructed. Created a light-based red light (660nm) and blue light (450nm) chip combination, blue chip and phosphor excited multi-spectral combination (R/G/B/FR) LED energy-saving light source; developed based on plant development characteristics Mobile LED light source and its light environment control technology significantly reduce the energy consumption of the light source. Compared with fluorescent lamps, the energy saving rate is over 62%. For the first time, the light-temperature coupling energy-saving temperature regulation method of plant factory was proposed, and the energy-saving regulation technology based on the coordinated temperature regulation of outdoor cold source and air conditioner was invented. Based on the reality that outdoor outdoor air contains cold source and high temperature energy consumption during light period air conditioning, the light-temperature coupled energy-saving temperature regulation method that puts the light period at night and introduces outdoor natural cold source to cool down is proposed for the first time. Air conditioning and temperature adjustment of the plant factory energy-saving environmental control technology and equipment, significantly reducing air conditioning energy consumption. Compared with the traditional air conditioner cooling, the energy saving rate is 24.6-63.0%. Invented the synergistic treatment technology of UV-nano-TiO2 nutrient solution and the method of improving the quality of vegetables by short-term continuous illumination before harvesting, and developed a technology for improving the quality of vegetables based on coordinated light-nutrition regulation. Invented the technical method of UV-nano-TiO2 synergistic treatment of self-toxic substances in nutrient solution, and proposed the new technology of short-term continuous illumination to control vegetable quality before harvesting, and proved the optimization parameters and regulation strategies of light environment to improve vegetable quality, and reduced nitric acid in leafy vegetables. The salt content is over 30%, and the Vc and soluble sugar content are significantly increased. Developed an environment-enhanced multi-factor synergy technology for plant plant efficacy, energy efficiency and nutritional quality, and integrated three series of intelligent LED plant factory products. The logic control strategy and algorithm based on multi-factor coordinated control such as light formula, light-temperature coupling and nutritional quality improvement were proved, and the intelligent control technology of plant factory based on Internet of Things was developed to realize the temperature, humidity and illumination of plant factories. Online detection, remote access, program update and networked intelligent control of CO2 concentration and nutrient solution EC, pH, DO and other factors. The integration created three series of intelligent LED plant factory complete sets of technical products: mass production, mobile, home micro-plant factory. Rare earth metals can be used to refine LED luminescent materials Recently, it has been reported that Japanese R&D personnel refine LED raw materials from rare earth metals in the deep sea near the coast. According to specific sources, Yasuhiro Kato, a professor at the University of Tokyo in Japan, and his research team succeeded in extracting Yttrium and cerium from rare earth metals in the outer sea of ​​South Bird Island for use as LED luminescent materials. Metal raw materials have been extracted from the seabed, and the technology is owned by a number of companies, including Toyota Motor, Mitsui Shipbuilding and the University of Tokyo. It is reported that once the technology is developed, metals extracted from the deep sea may also be used in industries such as electric vehicles, batteries and wind energy. At present, the Japanese government is considering whether to apply this technology to develop rare earth metal refining projects near Japan. A new discovery in the laboratory: the addition of boron can solve the decline in LED luminous efficiency. The Michigan research team released a new study in November and found that adding the chemical element boron (Boron) to indium gallium nitride (INGan) material can make the middle layer of LED semiconductor (middle The thickness of the layer is increased to solve the phenomenon that the luminous efficiency decreases as the injection current increases. This research has been published in Applied Physics Letters. A light-emitting diode semiconductor is a combination of a P-type semiconductor with positively charged properties and an N-type semiconductor with electrons. A hole having a positive electrical property after being energized is combined with an electron and generated. Light, the material used in the middle layer will determine the length of the wavelength. When electrons and holes move to the middle layer, too many electrons are simultaneously extruded into the middle layer, causing them to collide with each other, failing to effectively combine with the holes, and reducing the luminous efficiency, which is called European. Auger recombination. The solution to this problem is to increase the thickness of the intermediate layer so that there is enough space for the electrons and holes; however, it is not as easy to increase the thickness of the intermediate layer. Since the LED semiconductor is crystalline, there is a fixed arrangement rule between the atoms, and this specific pitch is also called a lattice parameter. When the crystal materials are stacked on each other, their lattice parameters must be similar, and the atomic arrangement rules can be matched with the material joints, otherwise the material will be deformed. Researchers Williams and Kioupakis found through prediction models that adding boron to indium gallium nitride can increase the thickness of the intermediate layer to facilitate electron and hole bonding. The wavelength of light emitted by the BInGaN material is also very close to the wavelength of indium gallium nitride, which can be adjusted to different colors. Whether the research can actually be produced in the laboratory is still unknown, and how much boron is to be incorporated is also a challenge, but the findings of the Michigan research team are a major contribution to the development of new LEDs. UK's new LED pavements alert drivers and cyclists A new type of embedded LED light pavement was unveiled in London to help detect pedestrians and warn drivers and cyclists about the dangers on the road. The new road was developed by a company called Umbrellium for the insurance company Direct Line and embedded HD cameras and LEDs on the road. Two cameras on the road were able to record hundreds of variables and detect pedestrians or other road users within 22 meters of the intersection. Information can be sent from the camera to the computer, which reacts in less than a hundredth of a second to allow the LED to display a variety of colors and patterns. Roads use machine learning to predict pedestrian movements and create a crossroads for them. The road surface is made of high impact plastic that can be embedded in asphalt. According to the designer's requirements, the plastic surface can withstand a lot of traffic. The plastic surface of the road has more than 660 LED lights that can be programmed to change colors and patterns to provide pedestrian crossing warnings for cyclists or drivers. The prototype road is waterproof, can keep the weight of the vehicle and people, and can distinguish the difference between people, vehicles or bicycles. RayVio's UVB LEDs or for the treatment of vitamin D-deficient patients PR Newswire's research in Scientific Reports shows that RayVio's 293nm UV LEDs produce light more efficiently in skin samples than in sunlight. Led by MD F. Holick, MD, and Boston University School of Medicine and Boston University Ignition Award, Tyler Kalajian and his team found vitamin D3 from skin samples exposed to RayVio UV LEDs for just 0.52 minutes. It is more than twice as much as the sample exposed to sunlight for 32.5 minutes. Dr. Holick, a professor of medicine, physiology and biophysics at Boston University School of Medicine and an endocrinologist at the Boston Medical Center, said: We tested UV LEDs from different sources and wavelengths. RayVio's 293nm LEDs show the greatest potential for vitamin D3 production in the shortest amount of time. This research will bring a new generation of photopharmacology technology that uses LEDs with specific wavelengths to cause specific biological effects in human skin, helping to treat and prevent chronic diseases. Vitamin D deficiency can lead to osteoporosis, rickets and other metabolic bone diseases, which are common in the northern and southern latitudes where long-term sunshine is limited throughout the year. This vitamin D generator is suitable for patients with fat malabsorption syndrome such as inflammatory bowel disease and gastric bypass surgery. Studies have shown that RayVio's UV LEDs can be used to treat patients with vitamin D deficiency. Ultraviolet LED devices that produce vitamin D3 can be used on areas of the skin that are less exposed to sunlight, such as the thighs, arms, abdomen, and back, thereby minimizing the risk of non-melanoma skin cancer. The device also emits a narrower band of UVB (UVB), which reduces the likelihood of skin damage when exposed to higher wavelengths of UV radiation. Dr. Robert C. Walker, CEO of RayVio, said: The potential of digital UV technology in phototherapy is enormous. Dr. Holick's research on our UVB LEDs demonstrates the potential of new applications to improve and save hundreds of thousands of lives. In the United States alone, 75% of adolescents and adults lack vitamin D. Through the efforts of the research team and the pioneering work of the Boston University Photonics Center on UV LEDs, we may soon see innovative treatment options (such as integration with wearable devices) that can help millions of people. The lighting does not rely on the electric rainbow tunnel to adopt LED self-illumination technology. On September 15th, the self-illumination project of No.1 Tunnel of Tianhuangping, No. 205 Provincial Highway, Huzhou City, Zhejiang Province was completed. This is the first rainbow tunnel in the city that does not rely on electricity. Pushing road maintenance projects is more energy efficient and environmentally friendly. The Rainbow Tunnel uses a new material that can be used without electricity or self-illumination. The new material is installed on the top of the tunnel and on the wall of the tunnel. The light-emitting principle of this new material is through LED electro-optic excitation-electro-optic energy storage-energy storage self-illumination-LED electro-optic excitation cycle work, which can absorb natural light, motor vehicles and various kinds of light light in only 5 to 15 minutes each time. Yes, without any energy, it can maintain yellow, blue, green and other light for 12 hours. In the Tianhuangping No. 1 tunnel, a self-illuminating illumination induction sign is also set accordingly, and a large area of ​​color bars is used as a warning reminder, and the induced sign on the road wall is beneficial for guiding safe driving.