Patented graphene nano-carbon heat dissipation technology realizes LED finless
In recent years, the use of graphene and other nano-carbon materials for heat dissipation has begun to be emphasized and widely adopted. In fact, as early as many years ago, people have successfully developed and used graphene nano-carbon materials for heat dissipation technology, and the graphene nanometer Carbon coating replaces the radiating fins, realizing LED without radiating fins, and applied for multiple patents in 2013: US 9170015 B2, he is Lu Hongzhi, Ph.D. in Optoelectronic Engineering, National Taiwan University.
Dr. Hongzhi Lu said that many related companies engaged in nano heat dissipation use graphene nano-carbon materials for heat dissipation.They often do not refuse customer requirements, but in the end they often find that the cooling effect of spraying is not significant. The biggest reason is that, Graphene nano-carbon materials use thermal radiation. The prerequisite for thermal radiation to be good is that the heat flow design of the mechanical parts is also good. If the mechanical parts commissioned by the customer are poorly designed and sprayed directly without screening, there will be no cooling effect. of.、
Therefore, Lu Hongzhi’s entrustment to the customer is personally screened by him. Only the parts that are qualified are sprayed, and the parts that are unqualified are returned. The unqualified rate often exceeds the qualified rate; because of his hard work and accumulation of experience, he has already practiced Like an antiquities appraisal expert, one can judge the pros and cons at a glance.
Because the heat of the LED light source must be well conducted to the coating layer of the graphene nanocarbon material, so that the heat dissipation effect will be good, and the product's mechanical components determine the key to whether the graphene nanocarbon material is effective; this is often a lot of The key factor neglected by the industry. Since each company has its own industrial design, it is generally unwilling to change the components. Therefore, Dr. Lu Hongzhi developed the graphene LED light engine. The heat does not need to pass through the mechanical parts. Therefore, the mechanical parts can use any material, Any design has no effect on heat dissipation and directly solves customer problems.
Figure 1 is a comparison diagram of the heat dissipation capacity of different graphene nanocarbon materials. The light source temperature (red line) of LED lamps using graphene nanocarbon materials is significantly lower than that of the unpainted LED (black line); as for the differences in the nanocarbon materials themselves The impact is not significant, such as carbon nanospheres, carbon nanotubes, or diamond-like carbon, etc.; however, Dr. Hongzhi Lu said that it can be further improved. It can be further reduced by mixing different graphene nanocarbon materials through a specific ratio formula (blue line) .
Figure 2 is a 100W graphene LED light engine, with high-power lamps and lanterns, using COB-type LED light source, and spraying graphene nano-carbon film on the back of the carrier board, which can keep the light source temperature at a safe 80 without fins. ˚C standard, so you can let the luminaire designer give full play to creativity without worrying about the influence of mechanical parts on heat dissipation.
