LED: a new technology to illuminate the information age

Is known as the "light future technology" LED (Light-Emitting-Diode- LED), gradually came to our daily life, and will lead us to a brighter future.

LED catch up from behind

After Edison invented in 1879 carbon filament incandescent lamp, lighting technology has entered a new era. Review the history of the twentieth Century lighting, fluorescent, high pressure mercury lamp, sodium lamp, metal halide lamp, compact fluorescent lamp, electrodeless fluorescent lamp, microwave sulfur lamp and other new light source. However, the real cause of emerge in an endless stream, illumination changes, or LED. Compared with the traditional lighting technology, LED is the biggest difference between different structure and materials, it is capable of converting electrical energy into visible light of the semiconductor, on the two floor, the middle electrode is provided with a conductive material, like a hamburger, luminous materials are laminated in the light color and pie. Change according to different material nature.

Incandescent lamp from the day it came out, with congenital defects, tungsten heating power consumption, large energy consumption, and easy to electric shock. Although fluorescent lamps than incandescent energy saving, but the disadvantage of human vision, mercury in the lamp tube is also harmful to the human body and the environment. LED is a full solid cold light source, smaller, lighter, more rugged, the operating voltage is only two volts, the service life of up to more than and 10 years. According to the usual definition of luminous efficiency, luminous efficiency of LED is not high, but because the LED spectra of almost all concentrated in the visible light spectrum, the efficiency can reach 80-90%, the same light efficiency of incandescent visible light efficiency is only 10-20%; the power of LED monomer, generally in the 0.05-1W, through the cluster can meet different needs.

The emergence of high brightness LED has epoch-making significance, it will be one of the greatest inventions of mankind after Edison invented incandescent bulbs. The earliest developed LED can only emit red light, used in electronic equipment in the indicator light. Today, LED has been able to issue a variety of red, yellow, blue, green, orange, amber, blue and green color, red and green color, yellow green, pure green, emerald green, white light. In China's major cities, has been everywhere LED dazzling brilliance, LED is changing our life and work environment.

Semiconductor technology in the wake of the microelectronics revolution, is pregnant with a new industrial revolution - lighting revolution. LED has become a shining symbol of the information age, will gradually replace the incandescent and fluorescent lamps and other traditional lighting technology.

Prominent advantages, a wide range of uses

The New York Times Square, people may not forget, the superior Coca-Cola advertising screen clear, bright color, true to life, the image in the computer under the control of the sea. In fact, as early as in the last century at the beginning of 90s, Germany and France and Spain Munich Airport highway appeared by LED lighting billboards or road lights, maintenance without climbing open the box, open the box as long as the light source light pipe on the ground, can replace the light source.

LED charm, a lot of advantages. In addition to long life, low energy consumption, LED greater strengths are three: one is the application is very flexible and can be made into point, line, face various forms of lightweight products; two is due to better environmental protection, no ultraviolet and infrared spectrum, no heat, no radiation, which belongs to the typical green lighting source the Recyclable and waste, no pollution control; three is very convenient, as long as the adjustment of current can be dimming, combined with different colors by using the sequence control circuit, be the most changeful, can achieve the effect of dynamic changes of rich and colorful.

LED not only can be used for large advertising display, but also for building and traffic lighting. LED as a key building in the city of night lighting, in outline outline can show their talents, can simulate any color, luminous flux loss and maintenance costs are greatly reduced. Due to the small size, LED suitable for the production of line lights, LED as a light, indicating direction, trails and lanes, safe and reliable, durable. In the past, in the city of the night sky, the most enchanting may be the number of neon lights, but because of the most vulnerable to damage to the neon lights, we often see that the picture and the text of the neon lights are always missing arm legs. If the use of LED to replace the neon as a sign, not only can avoid incomplete regret, but also to achieve the desired state.

Initially, LED was just as micro indicator lamp, used in computer, audio and video recorders and other high-end equipment, with the development of large scale integrated circuit and computer technology, LED display is rapidly emerging as a new generation of display media, LED has become a modern city of beautiful scenery, is widely used in various public places. In recent years, LED has gradually extended to the field of general lighting, from the stock market to the stock machine, from laptops to digital cameras, from PDA to mobile phones, from indoor lighting to car lights, LED everywhere.

Organic LED display of a single element reaction speed is 1000 times the LCD LCD screen, can also be taken care of in the light, and to adapt to the low temperature of minus 40 degrees. It is reported that a foreign company is developing a head anti-theft viewfinder will fingernail size high resolution organic LED display in the translucent wearing the helmet display, the pilot can easily check the flight data; the ongoing operation of surgical doctor eyes without leaving the table, you can see the image diagnosis of complex; the flight engineer in aircraft maintenance,