New problems and solutions of LED lamps

With the development of LED lighting products, there are two new technologies:

First, in order to increase the flux of a single tube, inject a greater current density, as mentioned below, so that the chip generates more heat, the need for heat dissipation.

Second, the new structure of the package, with the increase of LED source power, the need for multiple power LED chip set package together, such as COB structure, modular fixtures, will produce more heat to heat dissipation structure and more effective measures, it also proposed a new subject for the heat, otherwise it will greatly affect the performance and life LED lamp.

At present, the total efficiency of LED lamps is only 50%, there are a lot of power to become hot. Secondly, LED high current density and modular lamps will produce more concentrated waste heat, the need for good heat dissipation.

We offer the following suggestions to improve the heat dissipation:

1, from the LED chip, it is necessary to adopt a new structure, new technology, improve the LED chip junction temperature resistance, as well as the heat resistance of other materials, so that the requirements of the heat sink.

2) reduce the thermal resistance of LED devices, the new structure and new technology of packaging, selection of heat conductivity, good heat resistance of new materials, including metal materials, mixing glue adhesion between the fluorescent powder, the thermal resistance is not higher than 10 DEG /W or less.

3) to reduce the temperature, as far as possible the use of good thermal conductivity of the material, in the design of a good ventilation channels, so that the waste heat out as soon as possible, the temperature should be less than 30 degrees. In addition, to improve the level of modular lighting should be mentioned on the agenda.

4) a lot of heat dissipation methods, such as the use of heat pipes, of course, very good, but to consider the cost factors, should be considered in the design of cost-effective.

In addition, the design of LED lamps in addition to improve lighting efficiency and light distribution requirements, beautiful appearance, to improve the level of heat dissipation, with good thermal conductivity material, have reported that the body coated with some nano materials, increase the thermal conductivity of 30%. In addition, to have a better mechanical performance and sealing, cooling body also dustproof, LED lamp temperature rise should be 30 degrees C.