Thermal dissipation enhancement of LED filament bulb by ionic wind

The aim of this paper is to study the heat dissipation enhancement effect of LED filament bulb by using ionic wind. A LED filament bulb with 6 filaments is used for studying. There are two holes drilled at the end of the bulb and the ionic wind blows into the inner space of the bulb through the holes that will strengthen the heat convection of the filaments. The ionic wind generator includes the needle-net electrode, the flow channel and a high voltage DC power supply. The temperature of the filament is measured by an infrared thermal image instrument. According to the experiment results, the drop of filament surface temperature can reach to about 15°C with the corona discharge volatage higher than 9kV.