Good news continues to spread the popularity of LED lighting

After the candles, kerosene lamp, incandescent lamp, LED lighting will be taking over time. Europe and the United States and other countries have introduced regulations to eliminate incandescent lamps, incandescent life countdown, but also determine the future of LED lighting position.

Phasing out incandescent lamps

The United States as early as the 2007 Energy Information and Security Act (EnergyInformationandSecurityActof2007) legislation has been established, will limit the sale of low efficiency lamps in the United states. Coincidentally, since September 2009, 100W's incandescent light in Europe will be on the road to elimination, and in 2012 all the inefficient incandescent lamps will also be replaced. According to the European regulations, in 2016 all incandescent lamps will face the fate of extinction. Although these Regulations on the real driving force of LED sales has not yet appeared, but it reflects the management of LED technology to realize the value of energy saving and emission reduction.

According to the U.S. market research firm StrategiesUnlimited report shows that the current global awareness of energy saving, is suitable for the development of LED alternative light market, the market will grow rapidly in the next few years. Although the LED market is still in the early stages of the development of alternative lamps, but by 2013, the market is expected to replace the lamp LED revenue will grow, its compound annual growth rate will reach 107%.

At present, many countries and regions have developed a clear timetable for the prohibition of incandescent lamps, the United States, the European Union, Japan, Canada and other countries will be in 2014 before and after the elimination of incandescent lamps. National Semiconductor Asia Pacific market manager Li Zhiyuan further pointed out that the Chinese government has made it clear that in 10 years (2019) to complete the elimination of incandescent lamps. Although LED will face the competition of energy-saving lamps, but the more environmentally friendly LED light will gradually occupy the market advantage. "

So far, the backlight is still the most important application of LED drive market, especially in the notebook / netbook, cold cathode fluorescent lamp (CCFL) replacement and liquid crystal display and so on. But with the high cost, ultra high brightness, the emergence of a longer life LED, combined with the advantages of providing a wealth of color combinations and energy saving, LED in the general lighting market is also rapid development, prospects are also highly valued. This also helps to promote the LED into a more mature application. "Asia Pacific semiconductor power management department of marketing manager Jiang Jialiang on LED's future is optimistic. He believes that home and office lighting market has not yet been fully developed, so they are the largest market LED. "LED now there are some problems, and start the cost is still high, but after a period of time, the cost will be reduced, once you reach the affordable price, people will switch to the LED lamp, LED lamp because of higher energy efficiency, longer service life, and these two advantages are beneficial to the environment. "

LED price / luminous efficiency has yet to break through

There is no denying that LED has successfully entered the mobile phone and other portable applications, becoming the mainstream of small screen products. LED more attention of consumers, but in lighting always only heard, but no one down, LED lighting is not really popular, but the lighting of broader application areas remains to be further development of LED. "LED's slow progress in street lighting, home, office, TV, automotive and store lighting. Fairchild Semiconductor Technology Marketing Manager WayneSeto think LED to become mainstream lighting two to three years, but the cost must be further reduced.

In recent years, the performance of LED lighting has been significantly improved, the price has been reduced, but still can not compete with the already formed lighting technology. In contrast, the use of public facilities and commercial advertising price acceptance of LED is higher, while consumers are concerned about LED energy saving, while still focusing on the price of lamps.

At present, the main factors that hinder consumers to choose LED or price. "Li Zhiyuan in-depth analysis of consumer buying psychology," although the total cost of ownership of LED lamps (Totalcostofownership) has certain advantages than traditional lighting, but most consumers still is the value of the purchase price. "He suggested to solve the bottleneck of the development of LED lighting, on the one hand, need to continue through technological innovation as much as possible to reduce production cost and improve production efficiency; on the other hand also hope the government can encourage and subsidize consumers who pioneered the use of LED lighting.

In addition to price factors, Jiang Jialiang believes that the current constraints on the development of LED lighting factor lies in luminous efficiency. The absorption of light by LED substrate material GaAs is very serious, and its refractive index is very high, which affects the efficiency of output light. Without the output of light, in the LED junction area into heat, but to improve the temperature, so that the life of LED greatly reduced. It can be said that the luminous efficiency of LED led to the whole body. LED light source efficiency has yet to be further improved. At present, the industry claimed that the strongest LED light source efficiency between 132~136lm/W, the next few years is expected to further develop in the direction of about 160lm/W. Jiang Jialiang said. In addition, LED power conversion and drive efficiency needs to be further improved.

Drive for improved LED performance

Common LED drives on the market include switching regulators, linear regulators, and resistive drives. "Different LED drivers have different topologies, and the choice of drive depends on the input and output voltage ranges of individual applications. "Li Zhiyuan then detailed analysis of the selection of the specific way: when the input voltage is greater than the output voltage, select the buck (Buck) drive, when the input voltage