Demonstration of thermal degradation risk in Japanese electrical and chemical industry

Japan's electrical and chemical industry in the "Lighting Fair 2009" (March 2009 - 6, Tokyo Ming International Convention and Exhibition Center) staged a high power LED lights in different installation methods of the heat generated by the impact. The demo for 1W level high power white LED lamps were installed in the glass epoxy floor, high heat dissipation and heat dissipation plate, higher plate, observing the power of temperature change of white LED light surface 0.8W. The LED lamp is installed on the glass epoxy floor, when the lights around the surface temperature of +25 degrees Celsius in just a few seconds to rise above +50 C, "if this continues to light, white LED lights will be scrapped" (the company). Under the same conditions, the surface temperature of the heat sink is only about +32 DEG C, and the bottom plate with higher heat dissipation is only about +28 DEG C.

The purpose of the public presentation is to tell you, if the use of high power LED lamps do lighting appliances, you must choose a good heat dissipation of the floor (Mimura Naoki, responsible for the interpretation of the chemical industry). Because in considering the use of LED lighting appliances, there are still many people think that the use of glass epoxy floor to do LED lamp package is enough.

The sample structure used in this demo is as follows. The glass epoxy bottom plate is connected to the heat sink through the heat dissipation plate. High heat sink for the company 's "AGSP floor", which is directly connected to the heat sink. The higher heat dissipation of the sample is achieved by using this electrically heated AGSP substrate to connect to the heat sink via an electric heating plate.

State before lighting. From left to right, the glass epoxy bottom plate, the high heat dissipation bottom plate and the heat dissipation base plate are higher

After a few seconds, the temperature of the lamp is turned off

Resin forming fin products

In addition, the chemical industry also discloses a heat sink formed by resin. The heat sink is more metallic, and the resin forming product can ensure the electrical insulation property. The utility model has the advantages of high formability, and can also be used for the shell material besides the heat sink. The resin material is filled with filler in the resin, but details are not released.

The exhibition area of the electro chemical industry is located in the exhibition area of OSRAM optoelectronic products.