Printed Diod (video) Linköping University Loading video... Caption The video shows how a printed label picks up the radio signal from a telephone making a call, and uses the energy to switch the integrated display. This is only possible if there is a diode with GHz capacity that can rectify the signal. Credit Laboratory of Organic Electronics, Linköping University, Sweden Usage Restrictions Not to be published until 3 PM Eastern Time, July 7, 2014 Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.