Reviewing the seven breakthroughs in domestic LED technology innovation this year

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, Qianjia Lighting Network 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.

A shiny light bulb has been painted on the head of a person all the time, and is used to symbolize the inspiration of an inventor, but the German physicist Harald. Haas "lights up" by the light bulb itself: relying on a small lamp 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 in cooling, and the efficiency is only 5%. In contrast, the bulbs used in the world are inexhaustible, especially in domestic LED light sources are replacing 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 OneTimes 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 billboards work 16 hours a day, 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.

WorldwatchInstitute said that 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%.

3. The Chinese Academy of Sciences and Xinli Light Sources are the first innovative AC LED technology

The research team led by Zhang Hongjie and Li Chengyu, researcher of Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, and Sichuan Xinli Light Source, a member of the G20-LED Summit, jointly launched a new AC LED technology, “New Generation AC-LED Lighting Technology”. Recently, the technology won the 2012 British Engineering and Technology Association "Energy Innovation" and "Building Environment" two nominations.

The research results of Changchun Yinghua Institute innovatively invented rare earth LED luminescent materials with adjustable luminescence lifetime and matching with AC power supply frequency. As the core, the new generation of AC LED white light illumination technology with independent intellectual property rights in China. It solves the worldwide problem of AC LED strobe. Compared with traditional DC power-driven LEDs, this technology product has the advantages of good heat dissipation, high energy conversion efficiency, small size, etc., which can increase the lifespan by more than 1 time, and reduce energy consumption and cost by 15% and 20% respectively.

At present, the technology has been put into production, and has produced four major categories of lamps, downlights, tube lamps and spotlights, and has been successfully applied in homes, subways, shopping malls, hospitals and other places. The products have passed the US UL and EU CE certification and are sold to many foreign countries. The company has formed a production capacity of 10 million sets per year. In 2012 alone, the output value was more than 150 million yuan, and the profit and tax was nearly 40 million yuan.

4. The project of “Efficient and Low-Power Intelligent LED Lighting Equipment Development and Application” passed the appraisal

The project of “Efficient and Low-Power Intelligent LED Lighting Equipment Development and Application”, which is the result of the production, research and research of Southwest University of Science and Technology, has recently passed the expert group appraisal. The expert group believes that the LED lighting equipment developed by the project has the characteristics of adjustable brightness, temperature automatic control and automatic power consumption adjustment. The project research methods and technical approaches are innovative and the results have reached the domestic leading level. The core technology of the project has independent intellectual property rights. After popularization and application, the market prospect is broad, which has produced significant economic and social benefits. It is also recommended to further increase the application and industrialization of the results.

According to Zhang Jiangmei, project host and associate professor of Southwest University of Science and Technology, high-efficiency and low-power intelligent LED lighting equipment controls PWM output according to LED current brightness, total power consumption, light efficiency and temperature-light efficiency curve to achieve LED brightness and light efficiency. With the best balance of temperature, it can be widely used in the field of civil energy-saving lighting. At the same time, the project also designed a low-cost anti-flicker LED control circuit, which can greatly suppress or eliminate the flicker phenomenon of LED, meet the lighting needs of special fields, and promote the application of LED in a wider range of fields. The project also studies the use of flexible manufacturing technology to form a modular production technology for multiple series of LED products, significantly reducing the cost of a single product.

5, Xiamen University uses ultra-thin aluminum film to crack deep ultraviolet LED problem

A research team at Xiamen University has solved the key problem of "light extraction efficiency" that restricts the wider application of this light-emitting device by covering an ultra-thin aluminum film on the surface of high-aluminum nitride deep ultraviolet light-emitting diodes. These devices open up new methods and ideas in the industrial application of medical, environmental, military and other fields.

After a few years of research, the research group under the research group of the College of Physics and Mechanical Engineering of Xiamen University, Huang Kai, an associate professor of the research group, and Gao Na, a doctoral student, solved this problem by borrowing an ultra-thin aluminum film. When a surface of a deep ultraviolet light-emitting diode is coated with an ultra-thin aluminum film of only 5 nanometers, this aluminum film not only does not reflect the light emitted by the device more like a conventional mirror, but subtly turns the device toward The light emitted from the side is collected, passes through the aluminum film layer, and is emitted from the front side, thereby achieving an improvement in light extraction efficiency.

Huang Kai explained that this is because when the aluminum film is made very thin, the nano-effects make it different from the traditional mirror to reflect the light back, but concentrate the absorption to achieve light collection and frontal emission.

Tests have shown that the contribution of this layer of aluminum "outerwear" to the light extraction efficiency of UV LEDs will vary with wavelength. In general, the shorter the wavelength, the higher the efficiency. The data shows that the same is applied to the aluminum film, the ultraviolet light-emitting diode with a wavelength of about 310 nm, the light extraction efficiency can be improved by about 20%; the ultraviolet light-emitting diode with a wavelength of about 290 nm can increase the light extraction efficiency by about 50%; For deep ultraviolet light-emitting diodes with a wavelength of about 280 nm, the light extraction efficiency can be increased by 130%.

6, the world's first: 36 volt lighting products Heyuan was born

After years of research, the world's first safer, more energy-efficient and environmentally-friendly lighting product - "36 volt LED lighting system" has been successfully developed and mass-produced in Heyuan, and its inventor is the teacher of Yuanshan Town Central Primary School in Lianping County. A research team led by Liu Dongxing.

It is reported that the "36 volt LED lighting system" consists of two parts: "AC 220 volts to DC 36 volts" safety and energy saving switch and 36 volt LED lighting. A great advantage of this invention is that the user does not have an electric shock hazard. The key to not causing an electric shock hazard is on the safety switch. For this invention alone, 18 national patents and utility model patents have been applied.

Last year, the province listed “36-volt safe low-voltage power supply LED street lighting system development and its application” as one of the key projects of the provincial patent technology implementation plan.

Huang Xibo, a teacher and senior engineer of Heyuan Vocational and Technical College, believes that the "36 volt LED lighting system" will realize the power supply of 36 volt safety low voltage direct current to LED lighting for the first time, creating a precedent for 36 volt safe low voltage lighting technology, with great innovation and industrialization. value. The "36 volt LED lighting system" uses low voltage, does not cause harm to users, and uses a unified conversion system to extend the life of the LED, thus making it safer, more energy efficient and more environmentally friendly. This is a bold innovation in LED safety low-voltage lighting in the prior art, and is expected to replace the existing 220 volt or 110 volt voltage lighting at home and abroad.

7, modular technology Tianjin University of Technology LED control passed the acceptance

According to Tianjin University of Technology, China's "all-digital LED lighting control key technology and product development" project recently passed the expert acceptance, and the technical level is in the leading position in China.

The project was undertaken by the Semiconductor Lighting Engineering R&D Center of Tianjin Polytechnic University and supported by the National Science and Technology SME Innovation Fund and the Tianjin Science and Technology SME Innovation Fund. The technology uses digital, networked and modular technologies through “3”. +2" network structure, realizes the intelligent, humanized and remote control of LED lighting.

By utilizing modular control technology, users can control different LED lighting products through local or any connected remote terminal (such as computer or mobile phone) to realize the scene control of road and home lighting. At present, the technology has applied for 4 invention patents and obtained 7 utility model patent certificates.

The key technology of all-digital LED lighting intelligent control can effectively improve the management level of LED lighting system, and is the technological innovation of high-end application of LED lighting. This technology is mainly used for indoor and outdoor lighting control systems. Through modular combination, it can flexibly configure intelligent control systems for indoor and outdoor LED lighting of various scales.

At present, this technology has achieved the transformation of results. Tianjin Gonghaiyu Semiconductor Lighting Co., Ltd. has launched a series of products based on this technology, which is expected to be widely used in the near future. Its market application prospects are broad and its economic benefits are remarkable.

Seaskin Wetsuits are made from Jako super stretch neoprene foam, and it's limestone neoprene. Women wetsuits have so many scenes to be used, like Wetsuits For Surfing, wetsuits for scuba diving, Wetsuits For Spearfishing, Wetsuits For Triathlon and so on. You can choose many different styles and pattern colors from our website, also we can do custom wetsuits for you if you have good idea for OEM orders.

Wetsuits For Surfing

Wetsuit Top,Girls Surf Suit,Wetsuits For Surfing,Best Wetsuits For Surfing

Shenzhen Seaskin Sports Goods Co., Ltd. ,