LED lights are steady, the quality is good or bad with the heat lamp body itself is vital, radiating on the market of high-brightness LED lights, usually natural cooling, the effect is not ideal. Heat do not ideal, the life of the lamp itself also affected.
The application of heat sink material industry should not only focus on the radiation coefficient, while ignoring the thermal resistance. If you see only some heat patch, thermal paste, thermal coefficient of heat or thermal paint film is very good, you think you can put out a high thermal conductivity, you may be disappointed. So the expected temperature drop, LED epitaxy will not light failure due to overheating, lamp life can be effectively extended, case acceptance smooth clearance, and may not occur.
Tin from the base line etching, coating LED backlight ink on the protective film into the oven baking, leveling entire board, stick thermal film, then glue or adhesive locks will combine thermal module, in this tedious process It can be found: with better thermal conductivity of the material, will be defeated thermal impedance. Air, no adhesion junction pores, heat pads, thermal grease silicone oil volatilized powder form, the thickness of the multilayer film of thermal conductivity, thermal resistance will be formed. These multi-level resistance will prevent heat conduction rate of heat transfer is very slow, even less than the lamp surface conduction into the heat accumulating increase. White backlight ink aluminum substrate surface not only to reflection, but also can lower the heat dissipated by the backlight of the ink surface.
Some manufacturers do not observe, in general, white marking ink replacement LED backlit dedicated ink, plus the equivalent of a hard layer of paint, the heat sealed. After many failures, there are vendors to accept new ideas and processes, focusing on the overall cooling solution. Aluminum plate type heat switch LED white backlight special ink coating, if you specify the use of yellow ink backlight will enhance the reflectivity to 91%. Soft ceramic heat spray paint between the copper substrate and an aluminum plate, can reduce the use of Japanese film of thermal conductivity at a very low cost to improve the resistance to breakdown voltage.
To protect the lamp from climate erosion, the heat conduction out effective, economical and effective way is to spray cooling soft ceramic paint. Only starting from the overall cooling concept to reduce the thermal resistance of interference, large LED lamps is critical to acceptance of. Lamps protective housing should abandon the traditional plating or paint, both engineering methods will heat seal back into the fixture.
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