[Source: "High-tech LED-technology and application" April issue Lu Daming] I. Overview After more than ten years of development, the semiconductor lighting industry of LED technology has become a cluster of emerging industries that cannot be ignored. The trend of replacing the traditional lighting industry has been recognized by the industry. Its market size is large and its impact is far-reaching. It is already obvious to all. As we predicted more than a decade ago: LED lighting source will become the most excellent and lowest cost artificial electric light source, which will dominate the high-end to low-end full-series application market and become a new generation of electricity. light source.
For more than a decade, the concept of LED has grown from scratch in the general public, and its application products have gradually become familiar with the market. Although the road ahead is not smooth, the LED application market is booming in the contrarian. Nowadays, we can see the traces of LEDs everywhere. In addition to the most successful LED large screens, which have become the best outdoor flat media carriers, we can also see a large number of municipal buildings using colorful LED landscape lighting, especially at grand gatherings, such as The Beijing Olympics, Shanghai World Expo, Guangzhou Asian Games, etc., have been very successful in using LED technology, and have achieved unprecedented shocking effects, and quickly delivered to the society the superior information of LED.
Today, people are no longer strangers to LEDs, and practitioners, especially technicians, are more familiar. However, with the colorful RGB color LED market application, the LED lighting, which has a larger mainstream market in the future, has been faltering and difficult. Innumerable investors and technicians are eager to go, and quite a lot of blood is empty and empty. Many practitioners lament: What happened to the LED lighting market? Is it still not mature yet? For this hot potato, many people dare not touch it again.
In fact, there are two other reasons for this difficult situation: the most critical first point is that the LED light source itself is not enough, and the government level is not enough. On the other hand, most practitioners The lack of understanding of the essence of LED, blindly follow the wind, according to the gourd painting scoop, and the innovative design that meets the physical principles and has insights can be described as rare, but on the psychological level, it is inevitable that it will take a chance to enter a dead end. All these factors have seriously retarded the LED lighting industry to advance healthily and on a large scale.
Analysis and analysis, the current LED light source itself is mainly defective:
[1] The final cost of LED lamps is high, and the acceptance of the mass market is low;
[2] LED light source is seriously fading, and the actual service life is far from tens of thousands of hours or even hundreds of thousands of hours of publicity!
[3] LED light source is not soft, especially its point light source is very glaring, user acceptance is generally low;
[4] LED color source color rendering index R a low, it is not very comfortable, the color temperature of finished LED lamps is difficult to change as required;
[5] Others.
Despite this, the LED lighting industry has been tenaciously moving forward and never stopped! Countless tenacious people in the industry, with their excellent wisdom and hardworking hands, have created a brilliant, unprecedented ancient LED electric light source, the ingenious design, exquisite craftsmanship, have to make a film Call it! In particular, the LED lighting source continuously refreshes the electro-optical conversion efficiency of the artificial electric light source, reaching 231 lm/W in 2011, and it is constantly improving rapidly! Its energy-saving effect has made it not only incandescent lamps (light efficiency is about 10lm/W), but also fluorescent lamps (including the so-called "energy-saving lamps", induction lamps, mercury lamps, high and low pressure sodium lamps, light efficiency of about 60 ~ 150lm / W) And the metal halide lamp (light effect about 60 ~ 90lm / W), etc., it is difficult to look forward to its back.
For more information, please refer to the April issue of "High-tech LED-Technology and Applications" magazine. 
