Wafer thin and flexible - Wysips film technology allows light
to pass through a semi-cylindrical lens onto thin strips of
photovoltaic cells below, while also allowing the surface
underneath to show through
Mobile phones sporting photovoltaic panels are
nothing new but thanks to some lens wizardry, a French
company recently showed off a prototype phone where the
touchscreen display itself housed the solar-soaking cells.
Similar to the lenticular optics which sends slightly different
images to each eye for glasses-free 3D viewing, Wysips
technology allows light to pass through a semi-cylindrical lens
onto thin strips of photovoltaic cells below, while also
allowing the surface underneath to show through. The developers
say that many surfaces could potentially become self-sufficient
power producers.
The idea for
Wysips
is said to have been inspired by the holographic process used on
book covers, where the image changes depending on the viewing
angle. "What if I used these lenses to concentrate light onto
thin strips of photovoltaic material located between the image
strips?" optics enthusiast Joël Gilbert asked himself. "From one
angle we'd see the image and from another, the solar panel."
From there, a flexible lenticular film was developed onto
which micron-sized photovoltaic strips were deposited. Viewed
from certain angles, it appears transparent, but light hitting
at just the right point results in energy production – both
indoors and outside. The company says that its technology ranges
in thickness from 0.1 to 0.5 mm and is about 10 percent
efficient – which isn't too far from recent developments from
the likes of
Honda Soltec, and given the scope of potential applications,
it's quite a marvel.
The French technology company has chosen to concentrate its
initial development efforts on applications like mobile phones,
LCD screens, digital tablets, technical textiles, outdoor
displays and so on. The kind of power generated by the prototype
mobile phone on show at CTIA 2011 probably won't be enough to
make a smartphone completely battery-free, but should help to
significantly extend the device's use before needing to be
plugged into the mains for a top-up. The Wysips film would also
sit below the capacitive surface, so shouldn't interfere with
that glorious multi-touch interactivity we've all come to rely
on.
This is an interesting development, full to bursting with
potential. With Wysips currently looking for manufacturers ready
to use its technology, it probably won't be too long before we
see the first commercial examples hitting the shelves.
Copyright © gizmag 2003 - 2010 To subscribe or visit go to:
http://www.gizmag.com