Colored led flood lights product features:
1. Choose a single 10-80w high-power LED with integrated package of wafer and pului chip, with 70-80lm /W brightness, low light decay, high brightness and good heat conduction.
2. Aluminum alloy die-cast shell baking paint disposal, tempered bright glass, LED directly connected to the lamps to achieve outstanding heat dissipation intention, lamp body waterproof grade IP65, anticorrosive, dustproof, waterproof, earthquake resistant.
3. Professional optical lighting planning aluminum reflective cup, high output power, high utilization rate of light.The engine reaches the normal brightness within three seconds, the color index is high, there are red, green, blue, yellow, white and other colors to choose.Components: high thermal conductivity and anticorrosive aluminum heat dissipation shell, aluminum reflective cup, device rack;Transparent glass mask;High power LED light source integrated with wafer and purui chip; wide Voltage constant current source.
Commercial use: colored led flood lights can be used for factory area, stadium, dock, billboard, building, garden, tunnel and other lighting field lighting supply lighting. In existing LED illuminative technology level, because of the 80% that inputting electric energy is turned into quantity of heat, chip radiates quantity of heat accordingly very crucial.LED heat dissipation information is primarily internal thermal resistance and interface thermal resistance.
The effect of cooling base is to absorb the heat generated by the chip and transfer it to the thermal resistance to complete the heat exchange with the outside world.And cut the interface and interface touch thermal resistance, enhance heat dissipation is also the key, thus chip and heat dissipation base hot interface data selection is very important, the current selection of low temperature or eutectic solder paste or silver glue.
At present, white LED is mainly completed by three methods:
1. Blue light LED chip and fluorescent powder are selected. White light can be obtained by complementing blue light and yellow light or red and green fluorescent powder can be obtained by combining blue light announced by the chip, red light announced by the fluorescent powder and green light.
2, the use of uv LED chip announced by the near uv excited three primary color phosphor powder to get white light.
3. Red, green and blue LED combination is selected to emit light, i.e. multi-chip white LED; Currently, the second method, which is widely used, is to use blue LED chip and fluorescent powder to get white light by complementing each other.Thus, the lumen power of such a chip is determined by the initial luminous flux and optical retention of the blue light chip.
During the use of LED, the photons generated by radiation recombination simply lose when they are emitted outwards. The loss mainly includes three aspects:
1. Internal structure defects of the chip, data absorption, and reflection loss of photons at the exit interface due to refractive index difference;
2. Total reflection loss caused by the incident Angle greater than the critical Angle of total reflection;
3. After covering a layer of transparent adhesive with a relatively high refractive index on the surface of the chip, it is useful to reduce the loss of photons in the interface and improve the light pickup rate. Therefore, it is required to have high light transmittance, high refractive index, good thermal stability, good fluidity and easy spraying. It is also for the improvement of LED packaging reliability, which requires low moisture absorption, low stress, aging resistance and other characteristics.And the blue ray that general white LED still needs chip place to send arouses $phosphor to form luminous, still need to participate in phosphor inside encapsulating glue to undertake ratio mixes color, consequently phosphor powder arouses power and transform power is the key of high light effect.
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