Apple employees have applied for a patent to integrate photovoltaic cells in portable devices, placed beneath the touchscreen. The use of solar energy could make these devices something truly portable, to dispense with power outlets and electrical cables.
Normally manufacturers who want to integrate solar cells in mobile devices, they need to find a gap between the buttons and display screen, so you do not have much space. This implies that the electric generating capacity is insufficient. The patent application by Apple take advantage of the generous touch screens their latest gadgets (like the iPod or iPhone Touch) to place them under a thin layer of solar cells that maintain the aircraft always loaded.
Source: PC World
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