China Normal University lit up LED

In the same brightness, LED lamp power consumption is only 1/10 of ordinary incandescent lamp, and life can be extended by up to 100 times.

Two weeks ago, careful of East China Normal University students found that the lights changed the school science building. 40 Watt ordinary light bulbs are replaced by a small, flat light source of only 2 watts. They found that even if the 40 watts into a 2 watts, but the light bulb is not reduced, and looks more beautiful.

There is one thing they did not expect, the whole building replaced 2 watt light bulb, energy efficiency can reach up to 97%. According to reports, this new type of light source called white light LED, is composed of phosphor and light-emitting diode (blue LED) packaged together. The utility model has the advantages of obvious energy saving effect, long service life (at least 50 thousand hours) and protection of vision.

LED lighting does not require tungsten filament, do not need a lamp, in the same brightness, it consumes only 1/10 of ordinary incandescent lamp, and life can be extended by up to 100 times. It is known as the fourth generation lighting source, also known as the twenty-first Century green light source.

Prior to the industry pointed out that as long as 1/3 of incandescent lamps are replaced by LED lights, each year will be able to save electricity for the country nearly 100 billion degrees, equivalent to a Three Gorges power generation!

In the display technology, used in the field of decorative lighting LED display has been widely known. However, in the field of lighting, the industry is expected to be applied to the daily lighting of LED lights to 2010 after entering the application stage. The China Normal University and the Ministry of education, the Ministry of education and technology research center of advanced equipment, advanced technology, 2 years ahead of the white LED lighting technology in the field of lighting applications.

Professor Sun Zhuo, director of the research center, told reporters that under the same intensity of illumination, the LED lamp power consumption is 60% less than that of the fluorescent lamp, which is less than that of the incandescent lamp province by 90%. He said that in the system based on the use of LED lighting, lighting power supply system can be changed from the current 220 volts to 12 volts.

LED lights have a prominent feature - "protect the eyes". Professor Sun said that now more and more young people in myopia, one of the main reasons is that most of the current use of the lights are flashing. And the market of eye care fluorescent lamp is made with high frequency can not feel, but in fact, in the flash". Because the LED lamp uses the direct current, can truly achieve "zero stroboscopic".

In addition, the personality is also LED lights can play their part in the field. LED has the characteristics of intelligent control, can be adjusted red, green, blue, these three "three primary colors" light source. As long as the light remote control, you can instantly turn the lights into their desired color and intensity.

Professor Sun Zhuo said, from a technical point of view, energy saving, green LED lamps can replace incandescent and fluorescent lamps. 7 years ago, from an experimental point of view, the luminous efficiency of white LED has exceeded all light sources, after the rapid development of this field, the product a year like". By the end of last year, Sun Zhuo's research center in the phosphor powder added nano material, making the LED lamp energy saving and luminous efficiency is higher, the cost is also getting lower and lower.

From the beginning of 2005, LED lamp has done a number of demonstration projects in Shanghai, the construction of the overall energy consumption fell by seven to 80%. This year, East China Normal University, two campuses have begun to demonstrate the installation. According to the school's energy saving test, the value of 200 yuan or so, despite the high price of LED lights, but because of high energy efficiency, one year after the cost can be recovered, and in the case of the opening of the 24 hours, it can be used for at least 5 years.

Professor Sun said that in East China Normal University, Zhongshan North Road campus, only the replacement of public lighting, a year to save electricity up to 2 million -300 million yuan; add up to two campuses, public lighting part of a year can save 7 million -800 million, but "this is just a small part of".

According to the U.S. Department of energy predicts that by 2010, the United States will have 55% of incandescent and fluorescent lamps are replaced by semiconductor lamps, annual electricity savings of up to $35 billion, semiconductor lamps will form a $50 billion industry. In China, the industry has just begun.

Professor Sun said that at present the technology has been fully mature, has entered the pilot stage of industrialization. Mass production is expected next year. When they were in World Expo in 2010, they developed solar LED lights that could light up both sides of Pujiang.

Source: Xinmin weekly