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LEDs are breaking down barriers. At first it was just a tiny red light on the switch panel, and now it's everywhere, from screens to walls, ceilings to wearables. In the conventional LED display products, the quality is mainly improved, but the innovation is not much. Most of them are used in the industry in the high-end LED full-color display has been verified and more mature technology. These can be used as selling points for marketing, but not the key to entering the high-end market. The key to whether domestic brands can seize the opportunities in the high-end market is whether they can come up with innovative products that are truly technologically advanced and meet the needs of consumers. LEDs are breaking down barriers. At first it was just a tiny red light on the switch panel, and now it's everywhere, from screens to walls, ceilings to wearables. LEDs are advancing at a high speed, constantly creating new breakthroughs and innovations. Here is a brief overview of some of the advances in LED technology that are expected to make our world a better place. 1 The world's first full-color GaN-based LED The Southern California Ostendo EpiLab Lab developed the world's first RGB LED. Based on GaN technology, this LED uses three specific materials to form a quantum structure that emits different colors of light. Color LEDs can be illuminated individually or in combination. Conventional LEDs are typically monochromatic and can only emit a single wavelength. To achieve colorful RGB lighting effects, multiple LEDs are needed to blend to achieve the desired color. The color is determined by the phosphor coating or substrate material of the LED. Only a few researchers have tried to create a single LED chip that emits a full range of RGB colors. 2 GaN Brings Green LEDs Brighter Electronic and computer engineering scientists at the University of Illinois at Urbana-Champaign have developed a new way to make brighter, more efficient green LEDs. Using industry-standard semiconductor growth methods, gallium nitride (GaN) cubic crystals are grown on silicon substrates to produce strong green light for solid-state illumination. Generally, GaN forms one of two crystal structures: a hexagonal crystal or a cubic crystal. Hexagonal GaN is thermodynamically stable and is a conventional form used in semiconductor applications. However, hexagonal GaN is more prone to polarization, and the internal electric field separates negative electrons from positrons, preventing them from combining, thereby reducing light output efficiency. 3 Using Efficient White LEDs with New Materials Researchers at Tsinghua University in Taiwan recently published a paper in the scientific journal ACS Nano, which successfully used new materials instead of rare earth metals to make white LED products. This LED is basically made of alkali metal ruthenium, combined with a metal organic framework (MOF), and is combined with graphene and other materials in the upper and lower layers of the MOF to form a white LED. LEDs made from new materials emit light beams of similar quality to natural light and do not emit intense blue light. Lumen efficiency is significantly improved because it does not have to filter out other colors. 4 Japan develops red LEDs without rare elements Tokyo University of Technology and Kyoto University jointly announced the development of red light-emitting semiconductors that do not use expensive rare elements. Researchers are turning to alternatives to the use of abundant elements on Earth, such as the use of nitrogen and zinc as the standard for screening methods. Low cost materials can reduce the production cost of red LEDs and solar cells. 5 Hybrid nanocrystal LED suppression efficiency decline Researchers at Nanjing University have discovered a new application of hybrid nanocrystals that can be used to fill the holes of InGaN or GaN LED structures to significantly improve the lumen efficiency of white LEDs. These studies, published in Applied Physics Letters, point out that the key to improving color conversion efficiency (CCE) is determined by effective non-radiative resonance energy transfer, rather than combining blue InGaN/GaN LEDs or down-converting materials (such as phosphorus). Or even semiconductor nanocrystals). 6 Progress of UV LED free-form surface light distribution technology The Integrated Optoelectronic Technology Research Center of Chongqing Institute of Green and Intelligent Technology of Chinese Academy of Sciences has made important progress in the application research of UV LED free-form surface light distribution technology, and successfully used UV LED light source in the field of exposure machine. Products have been used in PCB, LCD panel, touch screen and other industries. The conventional parallel light exposure machine uses a high-pressure mercury lamp as a light source, and its life is only 1000 hours, which consumes high power and is polluted. The replacement of the mercury lamp light source with UV LED has a lifespan of 50 times that of the mercury lamp, and the power consumption can be reduced by 90%, which greatly reduces the production cost of the enterprise, and is environmentally friendly and pollution-free. At present, Chongqing Research Institute has broken through the key technologies of LED multi-free-form surface precise light distribution and inorganic optical component processing suitable for ultraviolet band. For the first time, a parallel light exposure head based on ultraviolet LED is developed. The parallel half angle can be controlled within 2, and the illumination is not The uniformity is less than 3% and the illumination intensity is as high as 40 mW/cm2. 7 New breakthroughs in LED heat sinks Li Kuanan, a senior engineer at China National Light Industry Association, introduced an innovative LED cooling technology with independent intellectual property rights. These companies are able to successfully eliminate all obstacles and use the wire form and fan forced way to dissipate heat and achieve good heat dissipation. The inventor Zhang Yixing pointed out that the design solves the heat dissipation problem and satisfies the requirements of high-efficiency, high-reliability and low-cost LED driving power supply, which fundamentally solves the two major problems of LED development. 8 New materials provide longer life for white LEDs Professors of the School of Chemistry and Materials Engineering at Wenzhou University invented innovative materials to Weidong, extending the life of LED lamps by nearly 10 years. Long-term lighting makes this material more widely used in luxury cars, high-speed rail, airplanes, subways and other lighting applications. It took many years for Weidong to emit yellow light on a single LED chip that can be synthesized at a high temperature of 2000 °C. If a blue LED chip is paired with a 5.5mm 5.5mm 24W light source on a single chip, the yellow single crystal material can stably emit white light. Due to the heat resistance of the chip and high conductivity, the LED lamp will have greater flexibility and longer life. LED bulbs are not easily damaged by high temperatures after long-term illumination, making them ideal for lighting applications in luxury cars, car lights, high-speed rail, airplanes and submarines. 9 Mercedes-Benz launches independently controlled LED headlights Mercedes-Benz launches multi-beam LED with 84 LED sources Headlights for higher light output resolution. This will allow other road users to better prevent glare while improving the lighting of the road ahead of the driver. Since the light distribution is completely freely configurable, it is possible to implement all of the high beam and low beam functions of the intelligent lighting system for the first time in full digital mode without any mechanical actuators. This will enable a large number of new adaptive lighting features that will make night driving safer. This technology is rapidly evolving: soon, with 1024 individually controllable pixels on each LED chip, it will further improve nighttime visibility, further enhancing security. Partners such as Infineon, Osram, Fraunhofer Gesellschaft IZM, Hella and Daimler have made breakthroughs in the AFS research project, which is very sophisticated. A monolithic structure of pixel LED semiconductor layers is built on a silicon substrate, with each LED chip allowing selective control of 1024 individually addressable pixels. The original title of the recent nine LED technology innovation inventory (