AC-powered LEDs Could Cut the Cost of Lighting | WHAT REALLY HAPPENED

AC-powered LEDs Could Cut the Cost of Lighting

Engineers at Pennsylvania State University have demonstrated a practical way to integrate gallium nitride LEDs and their power supply circuits onto the same chip using industry-standard manufacturing processes. The result is a lighting chip that runs directly from the AC electricity supplied by a wall outlet, with no need for the intermediate step of converting the electricity to low-voltage DC on separate silicon chips and other components.

The Penn State engineers describe the work in IEEE Transactions on Electron Devices.

According to Penn State engineering professor Jian Xu, who led the research, integrating the LED’s driver system onto the gallium nitride chip could cut the cost of manufacturing LED lighting as well as the cost of maintaining that lighting. As much as 60 percent of the cost of an LED bulb comes from the driver electronics, he says.