I want to do a few key parts of an LED lighting product. I don’t know, it is heat dissipation, driving power, and light source. At the same time, heat dissipation is particularly important. The heat dissipation effect directly affects the life quality of the lighting product, and the life of the driving power source itself. The stability of the output current and voltage also has a great influence on the overall life quality of the product. The light source is the core part of the whole product. The following explains the heat dissipation, drive power, and light source.
First, heat dissipation
LED lighting fixtures cooling questions
For the current common incandescent bulbs or fluorescent lamps, even if the product itself generates heat, the high heat of the components can be effectively isolated, so that the light source and the power supply socket do not cause unexpected problems due to heat. However, solid-state lighting is different. Once the LED components are concentrated in a single point of high temperature operation, more active means must be taken for heat treatment. At the same time, an active and effective heat treatment mechanism can be used to avoid problems with the lamps. The heat treatment of LED solid-state light sources is much more complicated than traditional lamps.
Conventional light sources or luminaires have many problems of high heat during operation, such as halogen bulbs or incandescent bulbs. In the case of incandescent lamps, the tungsten filaments are heated in specially treated bulbs to produce light.
In fact, the high temperature is generated on the filament instead of the lamp holder. Even if the lamp holder is indirectly generated by the radiant heat and heat conduction of the bulb glass or the metal by the tungsten filament, the temperature generated is within an acceptable safety range. In addition to non-direct contact conduction, safety is relatively high.
However, the heat treatment in the form of a LED solid-state light source may become a new application safety issue. Most people think that LED has high energy conversion efficiency, low driving energy advantage, and high natural safety. However, in order to achieve the purpose of daily lighting, LED solid-state light source must strengthen the unit by increasing the power of a single set of components. The output of the piece is clear. For example, the luminaire factory will adopt multiple LED components to enhance the output effect, and the multi-component operation can also improve the problem of the LED solid-state light source bias point light source, so that the LED solid-state light source technology can produce a light bulb like a bulb. The surface light effect.
If you want to enhance the output lumen of the cell, you must have a higher current to make the PN junction of the LED chip produce more lumens, but higher current will also make the temperature of the single-point LED component rise, more difficult to handle, even for Increasing the light-type performance and luminous efficiency of the luminaire and adopting the multi-component combination form will also aggravate the high temperature problem of the LED luminaire, making the heat dissipation problem more difficult to handle.
Looking at the current development trend of the LED lighting market, most LED light source manufacturers will first take the market as the leading factor. Because of the high unit price and high profit, they can also quickly enter the LED light source market with more advanced technology through technical differences. For example, The recessed lights, wall lamps and ceiling lamps used in interior decoration and situational lighting have become the more common design forms of LED light source lamps. The power saving effect after replacing traditional lamps is also the most concerned by relevant industry.
The LED management of LED light source lamps must focus on the thermal management design. In the case of recessed lamps, wall lamps and ceiling lamps that may be used in closed or semi-dense cycles, more stringent challenges are encountered. The developers of lamps must be from materials, product configurations, and mains. / Passive heat dissipation mechanism, driver chip design and other aspects to invest more resources to avoid product problems. In particular, the LED embedded luminaires are small in size, and often adopt multi-component integration, and the heat dissipation design of the module is difficult. The embedded lamp housing is designed with aluminum extrusion or heat sink to provide self-heat dissipation. But this is not enough.
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