Looking back at the lighting industry, with the development of science and technology, lighting sources have developed from incandescent lamps, fluorescent lamps, and HIDs to the fourth-generation green new energy LEDs . Not only have the principle of illumination changed, but the lighting sources have become more energy-efficient, environmentally friendly, and green. Despite the improvement of LED packaging technology, chip cost reduction, large-scale production, etc., LED lighting quality and cost performance continue to increase, but currently LED lighting is widely used by thermal design, materials, electrical accessories, drive power and other technical problems. Therefore, Xiaobian specializes in the domestic new technology articles for the LED lighting industry. 1, Fudan said that it has achieved "lighting Internet" technology without WiFi network speed 150M A few days ago, the School of Computer Science and Technology of Fudan University reported good news, an international frontier communication technology that uses the visible light transmission network signal in the house to be successfully realized in the laboratory. The researchers connected the network signal to a 1W LED bead. The four computers under the light can access the Internet. The maximum speed is 3.25G and the average Internet speed is 150M. It is the fastest "lighting Internet" in the world. All along, painting a shining light bulb on the head of a person is used to symbolize the inspiration of an inventor, but the German physicist Harald Haas "lights up" the light bulb itself. Myth: rely on a small light to turn an invisible network signal into a "visible" network signal. Haas and his team at the University of Edinburgh in the UK have invented a patented technology that uses flashing lights to transmit digital information. This process is called visible light communication (VLC), which is often called "Li-Fi". "In order to show that it can bring revolutionary changes to the wireless network transmission technology represented by Wi-Fi. How far is this unimaginable network technology from us? The answer is: very close, it is coming to us from the Fudan University laboratory step by step. Xue Xiangyang, a professor at the School of Computer Science and Technology of Fudan University, told reporters that the current radio signal transmission equipment has many limitations. They are rare, expensive, but not efficient. For example, mobile phones, millions of base stations around the world help them enhance their signals, but most of them Energy is consumed by cooling, and the efficiency is only 5%. In contrast, the bulbs used in the world are inexhaustible, especially in the domestic LED light source is replacing the traditional incandescent lamps on a large scale. Simply add a microchip to any humble LED bulb to turn the bulb into a wireless network transmitter. 2. Hong Kong Polytechnic University develops PWM technology to improve LED system efficiency Thanks to the high-performance LED drivers recently developed by researchers from the Department of Electronics and Information Engineering at the Hong Kong Polytechnic University, LED lights can be brighter and more energy efficient than ever. This award-winning high-efficiency technology can be applied to many areas, such as LED billboards, and can save 15% more energy. The new driver uses innovative multi-level PWM technology to power LEDs , which significantly improves light quality and energy efficiency compared to the PWM and linear drivers used in current LED products . This approach is not limited to LED drivers and offers many more benefits and options than PWM or constant current modes. With the traditional PWM method, the current received by the LED is pulsed instead of DC. This drive current is quickly switched at a speed that is undetectable by the human eye. Powering the LEDs with a pulsed current makes the light output easier to control. A research team led by Dr. LaiYukMing, Dr. Loo KaHong and Professor Michael Tse, who changed the PWM approach. Pulsed operation is a redesign that maximizes light output while minimizing thermal energy consumption. Thereby achieving higher luminous efficiency (lm/W). Dr. Loo KaHong believes that their technology can save 15% more energy. In large-scale applications, the energy-saving effect is more significant. A billboard for the One Times Square building in New York is a good example. The huge display in the building uses 12 million xenon lamps and has a power of 250 kW. If the billboard works 16 hours a day, then the monthly electricity bill is $18,000. Saving 12% means saving $2,160. Moreover, it has lower heat dissipation requirements and requires less heat sink than conventional methods. This means that LED systems can be made smaller. Thanks to its excellent dimming capability, this new PWM driver allows manufacturers to create fully dimmable LEDs for dimming performance down to 0 watts. These superior qualities result in brighter, smarter and more durable LED lighting solutions. According to the Worldwatch Institute, from an environmental perspective, the world is turning to the LED era. If all traditional luminaires are replaced with energy-efficient products, the lighting energy will be reduced by 40%.
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