1. What is low temperature lighting?
Low-temperature lighting refers to the use of artificial light sources for lighting, ambient temperature below 5 ° C Celsius, such as refrigerators, freezers, refrigerators, low temperature factories, outdoor lighting . In the past, low-temperature illumination sources were mainly fluorescent lamps, and now LED light sources also have a place in low-temperature lighting.
2, fluorescent light application in low-temperature lighting problems Although the fluorescent lamp at normal room temperature, luminous efficiency of up to 90lm / W can be considered a high-efficiency light source, but when entering a low-light environment, whether it is luminous efficiency, illumination or Aesthetic design has shown more disadvantages. Even if a manufacturer introduces a special low-temperature fluorescent lamp to solve the problem of luminous efficiency, it still cannot meet the requirements of illumination and aesthetics. And the price is also very expensive. In low-temperature environments, the luminous efficiency of ordinary fluorescent lamps can be reduced by half, and the service life is also shortened. Even if you don't consider the problem of uneven illumination of fluorescent lamps in low temperature environment, you should consider the problem of lack of color and color rendering of fluorescent lamps, because it can not show the best color of goods, and can not reach the purpose of attracting consumers. .
3. Several advantages of LEDs for low-temperature lighting Compared with CCFL fluorescent lamps, LEDs have special advantages for low-temperature lighting. First, the LED can achieve instant start-up even without a special circuit or programming even in a low temperature environment of minus 40 degrees Celsius. Second, the luminous efficiency of LEDs in low temperature environment is almost unaffected, and may even be better than normal temperature environment. The third is that the LED is a point light source, which has the characteristics of small volume and pointing light, and can be arranged in a refrigerating cabinet, a display stand and the like according to design requirements. And the LED can provide sufficient uniform illumination to better see the goods and labels. Fourth, the color, color temperature and color rendering of LEDs are all variability. According to the different lighting requirements of different products, the appropriate LED light source can be selected to attract consumers. The fifth difference between LED and CCFL power supply, CCFL first through the buck-boost DC/DC converter, it will consume 10% of the power, and then consume 25% of the power through the Inverter, and finally provide the energy to the Fluorescent tube. Only 70% left. However, the LED can be directly powered by the LED Driver, so that the efficiency of the entire transformer circuit is as high as 90%, which has a large energy saving advantage.
4, the future development prospects of LED low-temperature lighting LED low-temperature lighting was first developed in 2002 by GELCORE and the US LRC Lighting Research Institute LED low-temperature lighting system. At present, Taiwan's LED packaging manufacturers Yiguang and Guangbao Branch have launched LED low-temperature lighting products. In 2008, manufacturers have introduced household refrigerators with LED preservation technology, and the prospects are very promising. According to incomplete statistics, the average number of refrigerators and refrigerated/freezers shipped worldwide is hundreds of millions per year. If only 5 High Power LEDs are implanted per unit, the computing demand will be a huge demand. market. As the international call for environmental protection and energy conservation is getting higher and higher, it is estimated that LED low-temperature lighting will occupy the market share of low-temperature lighting system with its greater advantage.
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