IPhone fourth generation presented recently was not deflected from the tendency of the last years - interaction with user will be achieved through a sensory screen, which considerably improved its resolution. The use of glass for finishing the rear panel also pushed slightly associates to the interesting assumptions…
During September 2008 apple company  patented the method of positioning the solar batteries under the sensory screen. There is no need to explain, what possibilities this invention opens before Apple engineers:  entire number of company mobile devices obtain the possibility to be recharged from the sunlight. If we assume that rear panel will also obtain solar battery, then the orientation of the device on the surface influence the effectiveness of charging.  The ability  to simultaneously distinguish several contact points in sensory screen after the arrangement under solar battery will be preserved.
Judging by other apple patents, Â solar batteries will not become the basic power source, since the devices must preserve usual storage battery, and the possibility to be charged from the electric brush. Solar battery simply will become the additional source of free and ecologically clean electric power. The producers of accessories have already proposed chargers for the apple products, Â Â using solar batteries.