A.
B.
Two hundred paperback books weigh around sixty pounds. An electronic book reader like the Lightbook, plus 1,000 books, weighs around a quarter of a pound. So the e-book has it.
An e-book reader, though, needs electricity . In the absence of infrastructure (as we say) it must be solar powered. Hence the Lightbook, which has its own solar (photovoltaic) panel in the lid.
A solar panel the size of, say, the Lightbook screen will give us around three quarters of a watt peak output, and about 3 watt-hours over an average day. The Lightbook, therefore, needs to be pretty damned economical on power consumption. It is. It consumes about 0.2 watts mean, up to around a watt, maximum, when its processor is running at full blast and the screen is backlit.
C.
But your average laptop runs at around twenty watts (which is why you see people topping up their batteries whenever possible.) How can the Lightbook get away with about a hundred times less power?
So far, so good, then.
