Quote:
Originally Posted by bonacker
I had thought that a page displayed but never turned used no power. Why was it, I wondered, that there seemed to be more power being used to display a page that never changed than displaying a blank screen.
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The SCREEN requires no power in that state, but the rest of the device still needs to be in an "awake" state and ready to accept input, meaning that the processor and touchscreen have to be powered. It's also very likely that the firmware writes out the current state of RAM to the internal storage when the screen is turned off so that it no longer has to keep the RAM powered to refresh it (RAM loses its contents if not periodically refreshed).