presented by Wysips as far back as 2011, but now Apple is patenting integrated solar charging in the touchscreen itself. Instead of layers, the panel's electrodes serve as both touch sensors and solar power collectors, essentially allowing for the same thin devices we are used to with Apple, but with sun-charging capabilities.We've seen solar-charging screen layers on an iPhone,
A smart management unit then decides if the harvested energy will go to power the phone directly on the spot, or be stored in the battery for future use. If and when are we going to see such a solar system in an iPhone or iPad remains to be seen. Check out more ways to alternatively power your handset in the slideshow below.