Development and application prospect of high power LED Technology

Many countries and regions in the world, many provinces and cities in many by regulations or other means, to abandon the traditional lighting, instead of using the new technology, such as high-power LED (light emitting diode) for traffic, street lamps and other public lighting. For example, the EU countries, Japan, Australia, Brazil and Canada will strictly prohibit the use of incandescent bulbs by 2012. Medical equipment, signs, consumer electronic products, household appliances, decoration, security and other lighting appliances designers in the development of new products, using high power (1 watts or more high capacity) LED technology is increasing.

What is the cause of the sensation of high power LED so hot? Why is the LED market forecast to grow significantly in spite of the challenges facing the economy in 2009? There are two answers: today's high power LED can not only improve efficiency, but also to provide better lighting effect.

Improve energy efficiency

High power LED is extremely energy efficient, and has a higher brightness per watt than LED. For example, ordinary high power LED can provide 80 lumens per watt, while the energy saving lamp (CFL) can provide 70 lumens per watt, ordinary incandescent lamp can provide only 15 lumens per watt.

Special high power LED energy consumption between 1W to 10W. The energy consumption of the 60W is lower than that of the 40W low power domestic bulb and the common incandescent lamp. In some cases, the energy consumption of the 60W incandescent lamp is equivalent to 15 Watt energy-saving lamps (CFL) power consumption, while the energy consumption of energy-saving lamps is closer to the high power LED energy consumption. However, another important point of high power LED is no mercury component. Energy saving lamps contain a small amount of mercury, and now the world, provinces, municipalities are restricted to use mercury lamps. Usually when the energy-saving lamps and LED can meet the requirements of energy saving, only LED can meet the requirements of non hazardous substances at the same time.

High power LED can also improve efficiency in many other areas. The service life of high power LED is 10 to 15 times longer than that of the traditional incandescent lamp, which is more than 3 to 10 times longer than that of the energy-saving lamp. In fact, the durability of LED technology can not only save lighting maintenance costs, but also can reduce the generation of waste. LED lamp with high efficiency. The LED lamp is directional and therefore more targeted, and the LED lamp is more efficient than the conventional 180 degree astigmatism lighting device.

Better lighting effect

Advanced technology, especially in the last three years, has greatly improved the quality of high power LED brightness. The intensity of the color is from 1 to 100, while the 100 is exactly the same as the sunlight. When the color rendering index (CRI) fell to less than 80, the color seen in this light will be inconsistent with the true color of things. Good color rendering index is usually more than 90. A number of energy saving bulbs have a color rendering index of 75 to 90, with an incandescent lamp index of up to 100. LED's index now reaches 90 or more than 90. As a result of recent advances in technology, both white and color high power LED color rendering index are high.

Early white LED blue chips are coated with a layer of phosphor. Until a few years ago, this combination can get enough cold white light, usually on the site and on the road to use. But white LED can not provide "warm" white light for household lighting devices such as kitchen lights. The fluorescent powder coat technology improves and many products makes the lessons we create an automatic system, this system through the radiation frequency, for white LED lights automatically tell the cold and warm light. In the past, LED was limited to "white" or "non white"". Now some manufacturers can be divided into 50 different types of white color.

Recent improvements in primary colors (RGB) LED have significantly improved white and color LED subtitles. Red green blue (RGB) LED chip package red, green and blue three colors together, can emit light of different colors. Previously, RGB LED issued by the mixed color is very unstable, and high power LED driver successfully solved the technical problem. The recent high power RGB LED, such as Lumex's AstraLED, makes white light and color light are very stable, soft.

LED is more flexible than other lighting. The LED system is compact in structure and can be used in conjunction with sensors and other lighting controllers such as dimmer, daylight controller, and dynamic dimmer.

Concluding remarks

High power LED market with high efficiency, good quality. High power LED cost savings of significant advantages and good performance makes it more and more people choose. Nowadays, in many homes and offices, we can see people using high power LED technology. In the future, people will also be applied to the high power LED sensor technology to achieve automatic opening function. Another is the field of infrared LED technology, when the night vision system will be greatly improved.

About the author

COACH (Coates) is a high power Lumex technology manager, LED and LCD technology leader. Work in the field of Optoelectronics ten years, he participated in the industry leading brands LED and LCD design, involving small home appliances to the aviation industry, specializing in high power LED lighting. Mr. COACH has a degree in electrical engineering from the University of Illinois, and the email address is engineering@lumex.com.

Captions: Brian Coates, Inc. (Lumex) high power technology manager

Captions: there are many examples of high power LED applications in the neon industry. In addition to the display wall (picture), as well as large screen, emergency lighting, exit lighting, billboards, decoration