The difference between UVLED cold light source and UVLED hot
Time:2016-04-11 17:40Source:sankunClick: Number
The difference between UVLED cold light source and UVLED hot light source
Often hear a concept, that is, cold light source and heat source. The heat source, cold light source, how what is the difference? What kind of light source as the heat source, what kind of light source and cold light source? Hite Ned to explain for you what the difference between the heat source and cold UV light source.
Cold light source and heat source, not only from the definition to distinguish. In fact what we call the cold light source does not mean that it does not produce heat light, but not directly by the heat energy is converted to light energy. Incandescent lamp is typical by electrical energy into heat energy, then the process of heat energy into light energy. High heat loss, luminous efficiency is low, according to the current developing trend of UVLED line light source is cold light source to replace heat source is inevitable. Therefore UVLED line light source can be used as a cold light source.
Heat source:
Using thermal excitation light source, such as incandescent lamp in 3000-4000 K temperature thermal radiation. Incandescent lamp is 80-90% of the energy conversion to heat energy, about 10% of the energy is converted to light energy. So luminous efficiency is low. We are not according to the temperature of the shell of lamps and lanterns is defined as the cold source, heat or light. The surrounding temperature of lamps and lanterns, can evaluate the superiority of the lamps and lanterns of the cooling measures.
cold light source:
Uvled cold light source is the use of chemical energy, electrical energy, biomass of excitation light source (fireflies, neon lights, LED, etc.). Has the very good optical and flash features. Luminous objects, its temperature is not higher than the environment temperature, cold light, this light is called for if the LED is to use electron hole on the composite luminescence.
Strictly speaking, LED lights is electroluminescent heat is also produced, is relatively lower compared with incandescent lamp light source such as. LED electro-optic conversion efficiency is about 30%, of which about 70% internal quantum efficiency (close to theoretical limits), external quantum efficiency is about 50% (it's only the experimental data, are not accurate values).
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UVLED(33)led uv(6)
