Researchers at Disney have developed a technology that can generate enough energy from the movement of a fingertip to light a string of LEDs or to control lights or other electrical components on e-paper or printed materials.
The Paper Generator -- developed primarily by Disney Research scientists in Pittsburgh -- relies on the placement of a sheet of polytetrafluoroethylene (PTFE), more commonly known as Teflon, between two thin reactive layers of material like metalized polyester that act as electrodes. Researchers Mustafa Emre Karagozler, Ivan Poupyrev, Gary Fedder, and Yuri Suzuki describe the new technology in this paper. It seems like an energy-harvesting version of touch technologies used in mobile devices. The user rubs, taps, or slides a finger over the materials to generate electricity.
The Paper Generator harvests energy when the user rubs, taps, or slides a finger over a thin sheet of Teflon sandwiched between two thin sheets of reactive material. Invented by researchers at Disney Research, the technology could be used to power small devices or interactive technologies for e-games or displays. (Source: Disney Research)
A key component of the technology is the leveraging of electrets (materials with electrical properties) already used in microphones and MEMS devices. When the reactive paper layer rubs against the Teflon sheet, an electrical charge accumulates. If the electrons move relative to one another against the Teflon -- the action caused by the rubbing or sliding -- it generates a small current that can power a number of devices, the researchers wrote in their paper.
The operation of the Paper Generators relies on the movement of the two conductive sheets relative to each other and the electric field source, i.e., PTFE. As the relative positions of the sheets change, the distribution of the induced charges, the electric field, and the total capacitance between the sheets change, resulting in an electric potential difference between the conductors... Hence, the mechanical movements of the sheets and the field source are converted into electrical potential energy that can do work.
Poupyrev, director of the Pittsburgh interaction group for Disney Research, told us in an email that the Paper Generator can eliminate the need for power sources for some small devices, such as infrared communication devices or LED displays. This would make it easier for designers to add visual and audio technology to printed and e-paper materials. "We can imagine any number of ways to use this to add sights, sounds, and other interactivity to books and other printed materials inexpensively and without having to worry about power sources."
He would not discuss how Disney will employ the technology.
"Researchers at Disney have developed a technology that can generate enough energy from the movement of a fingertip to light a string of LEDs or to control lights or other electrical components on e-paper or printed materials."
Elizabeth, it's possible to generate a small amount of energy through the figure tip touch. In piezoelectric devices, energy can convert from one form to another by various means. By touch, the element can convert the touch force to an equivalent energy.
"I imagine Disney has some inventions up its sleeve for this technology. I'm sure it will be a boon to kids' toys, games and also promotional materials."
Elizabeth, no doubt for that. actually most of the parents are tired of changing the cells frequently, for their kids toys. Some mechanism for converting the toy activity to a self powering mode will be very good.
Again, MyDesign, you make a very good point. If enough power could be generated to power the entire toy and not just some kind of light or gizmo on the top, then this technology would be even more useful.
Researchers have been working on a number of alternative chemistries to lithium-ion for next-gen batteries, silicon-air among them. However, while the technology has been viewed as promising and cost-effective, to date researchers haven’t managed to develop a battery of this chemistry with a viable running time -- until now.
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