High power LED is one of the most important means to achieve high luminous flux. Using high-power LED lighting has many advantages and disadvantages. How to use high power LED is the key. Meanwhile, this paper makes a comparison between high-power LED lighting products and traditional lighting products, and also discusses the application of high-light LED in lighting.
The development history of LED and the application potential LED from the birth to today is 30 times the brightness of every 10 years, the price drops 10 times the "Haitz" law rapid development. The normal high brightness white led has reached 100 lm/W level in the laboratory, and 50 lm/W high-power white led has been entered into trade. In terms of monochromatic light, red, yellow, blue, green lighting is constantly being refresh record, LED as a new type of light source, application scope is more and more widely, also gradually caused the attention of more people and period.
Currently, LED applications are diversified in various industries, including instructions, display, backlighting, lighting, etc. Lighting is the most promising industry in the many applications of LED. With the continuous improvement of LED lighting efficiency and the constant decrease of the cost, the market in the whole lighting area will also expand. Following the "next generation lighting plan" in the United States, Japan's "21st century lighting plan", "rainbow plan" of the European Union and South Korea "solid-state lighting plan", national semiconductor lighting project team was set up in China in 2003, aims to integrate resources, the rapid advance of LED in lighting market. According to speculation liang-hui Chen academicians of Chinese academy of engineering, from 2005 to 2015 in our country, the semiconductor lighting can be accumulated energy saving 400 billion KWH, electricity bills for the user to save 260 billion yuan, 150 billion yuan output value, solve the employment of 1 million population.
By then, semiconductor lighting will be saving more electricity each year than the "big MAC" -- the three gorges power station's annual generating capacity! Under the background of increasing energy shortage, LED lighting is used to develop LED lighting, which is a positive response to the government's proposed construction saving society.
Two, high power LED characteristic and compare LED with other light source is called "green light source" is worthy. In the lighting industry, compared with the traditional light source, some aspects show the advantages of difficult substitution: LED as a light source for illumination has the following advantages:
1. Low power consumption: the power consumption of leds with a light effect of 75lm/W is about 80% lower than that of incandescent lamps with the same brightness.
2. Long life: the product life is 50 thousand hours, 24 hours continuous light can be 7 years;
3. The dynamic control of brightness and color is easy: the brightness can be continuously adjustable and the color purity is high, and the color dynamic transformation and digital control can be realized.
4. Flexible dimensions: can realize the organic integration with the building and achieve the effect of not seeing the light;
5. Environmental protection: no harmful metal mercury, no infrared and ultraviolet radiation;
6. Color: bright and saturated, pure, without filter lens, the red and green and blue color elements can be adjusted into various colors, which can achieve changeful, progressive and mixed light effect, and the color effect is excellent. With so many advantages, we feel that it is a valuable job to promote the use of LED.
However, the LED and other light source comparisons also have insufficient aspects, such as in the white light illumination color is low. Currently, white leds produced by yellow phosphors and blue light have an index of about 80. As general illume still can, but the place that has a few color to distinguish requirement tall appears insufficient. Is by adding the appropriate methods of red phosphors, can make the color rendering index progress to 90 or higher, but compared with incandescent light bulb 99 still has certain gap, and its efficiency will be affected. The RGB color processing can also improve the color rendering, but more work is needed to make the application more popular, so the LED needs to be improved. As far as the price is too high, the one-time investment is big, really from comprehensive this money consideration, many occasions use LED or saved a large amount of money. Table 1 below is incandescent lamp, fluorescent lamp, ordinary LED with high power LED the life of the contrast, can be seen from the table below, the high-power LED in the life has the very big, from incandescent lamp and fluorescent lamp room for improvement in a lot of technology has been very small.
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