Technology

59669 readers

2830 users here now

This is a most excellent place for technology news and articles.

Our Rules

Follow the lemmy.world rules.
Only tech related content.
Be excellent to each another!
Mod approved content bots can post up to 10 articles per day.
Threads asking for personal tech support may be deleted.
Politics threads may be removed.
No memes allowed as posts, OK to post as comments.
Only approved bots from the list below, to ask if your bot can be added please contact us.
Check for duplicates before posting, duplicates may be removed

Approved Bots

founded 1 year ago

MODERATORS

[email protected]

255

Scientists invent micrometers-thin battery charged by saline solution that could power smart contact lenses (techxplore.com)

submitted 1 year ago by [email protected] to c/[email protected]

38 comments fedilink hide all child comments

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.

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 6 points 1 year ago

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.