LED serves as replace conventional lighting tool (wait like incandescent lamp, haloid lamp) new-style illuminant, its come loose the real service life that heats up the effect to affect LED badly, medicinal powder the crucial factor that heats up craft to make LED application and progress, infra-red heat can undertake like appearance LED temperature detects, help test and verify comes loose hot craft.
LED brief introduction
LED(LightEmittingDiode) , call glow diode again, it is to use solid semiconductor chip to regard glow as material, bring to bear on when two end to voltage when, semiconductor carries mediumly stream child happen compound, give off excess energy and cause photon to shoot generation visible light, far infra-red, close infra-red light.
LED is a kind of new-style solid state illuminant, had shown the result with out exceedingly good body in special domain, the LED of all sorts of types, product that uses LED to make development 2 times and the product development with LED form a complete set are rapid, new product appears on the market ceaselessly, already developed many new-style properties. Look into in the future, still expect to rise further.
What does heat have to basically use a site in LED industry like appearance?
In fact, the real life of LED and working temperature often become inverse ratio, if LED service life is 74 ℃ is 25000 hours for 10000 hour, 63 ℃ in working temperature, when be less than 50 ℃ , can be 50000 hours. The photoelectricity that prime cause is LED changes efficiency extreme difference, about only 15% turn to be outputted for light to 20% or so electric energy, the others all is changed become heat energy, accordingly, the LED that should use high power in great quantities at group of a model, apply at the operation of tall brightness, the changeover efficiency of these extreme difference will be caused medicinal powder the big question of heat treatment.
Heat resembles appearance can producing effect in process of research and development not only, and the respect such as the character government that OK also in the product applying.
1 research and development: Tao embeds circuit of drive of 訪 ED module (include power supply) , illuminant semiconductor is calorific distributinging analysis, reach light to decline the test.
A) circuit of LED module drive
In LED product research and development, need engineer undertakes circuit of one part drive is designed, for example rectifier circuit module. Use heat to resemble appearance, discover the part with the unusual temperature on circuit the engineer is OK and rapid and conveniently, facilitate perfect circuit is designed.
B) chip of LED illuminant semiconductor is calorific
Use heat to resemble appearance, the engineer can give out heat through illuminant semiconductor chip infra-red heat pursues, the analysis gives the temperature when its chip is working, and the distributinging circumstance of temperature, in this foundation, achieve the goal that improves LED product life.
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