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 dominated by fluorescent lamps, and today LED light sources also have a place in low-temperature lighting.
2. Fluorescent lamps are used in low-temperature illumination. Although fluorescent lamps have a luminous efficiency of 90 lm/W at normal room temperature, they are high-efficiency light sources, but when they enter a low-light environment, they are luminous efficiency, illumination, and aesthetic design. Shows more disadvantages. Even if a manufacturer introduces a dedicated 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 the problem of uneven illumination of the fluorescent lamp in a low temperature environment is not considered, the problem of insufficient color and color rendering of the fluorescent lamp should be considered, because it cannot express the best color of the product, and cannot achieve the purpose of attracting consumers.
3, LED is used in low-temperature lighting several advantages compared to CCFL fluorescent light source, LED is also a special advantage for low-temperature lighting. First, the LED can achieve instant start-up even without a special circuit or program design 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 originally developed in 2002 by GELCORE and the US LRC Lighting Research Institute. 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. With the increasing international calls for environmental protection and energy conservation, it is estimated that LED low-temperature lighting will occupy the market share of low-temperature lighting systems with its greater advantages.
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