|RF energy powers printed lighting device||| Print ||
|Written by Akiba|
|Tuesday, 28 July 2009|
In a combination of RFID-like energy harvesting and organic electronics, a group of companies has powered a printed electroluminescence device wirelessly. The technology could be used for security applications and payment cards.
The prototype is implemented as a hybrid — that is it contains organic (or printed) components as well as classical silicon-based circuitry. The printed components include an electroluminescence display and the RFID antenna as well as the conductive paths. The power control circuits including a rectifier and a dc/dc converter are implemented in conventional silicon-based manner, but the die is directly bonded to the carrier without the need of additional contacts. In addition, the prototype contains a (conventional) micro battery keeping the electroluminescence light on even after the RF field has been removed.
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