The semiconductor lighting

A new way of lighting is moving closer to our lives. When semiconductor lighting is widely used in traffic lights, electronic screens, landscape lighting and other fields, it has sounded the clarion call to enter the general lighting market.

In 8 at the end of this year held in Shanghai Chinese International Semiconductor Lighting Forum, the general manager of Hongkong Huagang photoelectric Group Co. Ltd. Shi Yucan made such a summary of this trend: "in 2007, the semiconductor lighting industry has an obvious change, is to use the field to the commercial lighting field is extended from special. "

Currently, the United States GE, Holland PHILPS, Germany, Osland, the three largest producer of the world's lighting and semiconductor companies have set up a joint semiconductor lighting company, to seize the commanding heights of the industry. U.S. Department of Energy Research Report, in 2010, the United States will have 55% of incandescent and fluorescent lamps are replaced by semiconductor lamps. Some experts believe that by 2010, semiconductor lighting is expected to exceed the fluorescent lamp, directly into the global electricity consumption accounted for 15% ~ 20% of the general lighting.

Li Jinmin, director of the Institute of semiconductors, Chinese Academy of Sciences, in the country, is expected in 2010 semiconductor lighting industry output value will reach 100 billion yuan. Chen Lianghui: Chinese Academy of engineering such an account, if the lighting market in 2010 1/3 to enter the semiconductor lighting, saving 30%, annual saving 100 billion degrees, which is equivalent to at least one of the Three Gorges project power generation. "

This prospect is very attractive.

35 years or in the past ten years?

Semiconductor lighting is so popular because of its unique advantages: high efficiency, energy saving, environmental protection, safety, long life......

If you walk in a street in Nanjing on the evening, careful you might find the head of street light seems to have spiritual, just on the road, the road is not "overflow", also do not leave any light to the "shadow".

"This is the semiconductor lighting, it will not cause light pollution or waste, general incandescent lamp, fluorescent lamp is impossible. Luo Yi, director of Integrated Optoelectronics Laboratory, Tsinghua University, told reporters. Now, Tsinghua University is ready to use the campus lighting on the semiconductor lighting, and now, some cities in the south, the Pearl River Delta region is the use of this kind of semiconductor lighting products.

If such illumination way for Home Furnishing, you may not see any lights, and only a luminous ceiling, with the morning, noon and night time to adjust the lighting source, the indoor light environment near the moon, the stars, the sun and other natural light. Adjust to the "Star" state, the house lights dim. "The moon" state, indoor with cold light "month". When the sun is in, the room is exactly the same as the day.

How far is this wonderful vision from us?

In this regard, Luo Yi said, "the next 35 years is an important period of development, semiconductor lighting will emerge like bamboo shoots after a spring rain like in the field of general lighting, but, like the incandescent lamp as a space for one person to occupy the real market, need for nearly ten years. "

The "heart" of semiconductor lighting is the source of light emitting diode (LED) two. In fact, LED has long been the traditional red, green and blue LED are mostly used in the display, traffic lights, consumer electronics, landscape decoration and other fields. The high brightness, high power white LED and traditional LED has a different nature. It can be said that high power white LED is the key to ignite the dream into the general lighting market.

But this is also a weak link to be broken. "The best LED chip on the global market is very close to the standard of indoor lighting efficiency. However, to make it into a lamp, there are many aspects to be improved. Luo Yi said.

In an office at the Tsinghua University, Luo Yi showed reporters a LED - a small crystal like object, with two thin metal wires stretched out at the end.

This little thing is worth a lot of money. Luo Yi told reporters, do a brightness equivalent to 40 watts of fluorescent light semiconductor lighting products, the need for the best of the LED, and the cost is about 1000 yuan. The reporter learned that now in the European market, the introduction of semiconductor lighting reading lamp, the price close to 2000 yuan. When more than a dozen dollars on the market in the market are all high, such a high price is difficult to be accepted by most families. And can not expand the market, it means that the cost can not be reduced.

Moreover, high prices may not be high quality. Semiconductor lighting in theory the electro-optical conversion efficiency is close to 70%, but at present, the semiconductor lighting conversion rate is best reached 30%, and did not reach the level of energy saving, ideal and, in the heat, there are technical defects in optical, driving etc..

In Luo Yi's description, under the existing conditions, the white LED made possible the light is not soft, uneven problems, "perhaps it than fluorescent lamp to glare, people can accept the lighting effect, or a question mark. "

Rare opportunity

However, despite the cost, luminous efficiency, structural design and other aspects to be improved, but regardless of 35 years, or ten years, this is just a timetable problem.

"Certainly will be more and more energy saving, better and better use. Luo Yi said.

Li Jinmin also appears quite confident, semiconductor lighting development speed is basically 18