Scientists invent micrometers-thin battery charged by saline solution that could power smart contact lenses::Scientists from NTU Singapore have developed a flexible battery as thin as a human cornea, which stores electricity when it is immersed in saline solution, and which could one day power smart contact lenses.
Would you be able to close your eyes to not see anything/ads? I don’t know much about the tech, but I would assume a light is being emitted from the contact lenses and since that’s behind your eye lids…
I have no idea but I think anything that emit light would drain the battery to quickly.
I would imagine it would more like a e-paper screen.
I have no idea how these work, but one hack idea off the cuff:
You get the light for free. At least when your lids are open; that’s how vision works. A cheap digital watch lasts ages on a tiny coin cell because the polarisation of the LCD, which passes or blocks polarised light, takes minimal energy. Stack up a passive polariser, and the active LCD-like layer, (and maybe a second passive layer?) and you can cast selective shadows on the retina.
This gives you monochrome “smart vision” in the same sense as a monochrome Casio wristwatch. No idea how to tackle issues of focus at such a short focal length, or achieving any sort of active display let alone colour.
Maybe the whole thing is a pipe dream crackpot idea.
