Samsung Ring with spinning coil and body heat harvester wirelessly charges phone - Page 1
Forum section: electronics / general

author: alexei
author_rank: Newbie
timestamp: December 15, 2020, 02:48:40 am
content: https://www.gizmochina.com/2020/12/03/samsung-user-powered-wireless-charging-ring/https://www.phonearena.com/news/samsung-patents-self-powered-wireless-charger-ring_id128705Patent:http://link.kipris.or.kr/link/main/sharePage_EN.jsp?reg_key=gaXejDaQeuOtyJld32oYgA==&APPLNO=1020200005597QuotePatent abstract:Quote1. (Thermoeletrically?) generate ~100 uW from body heat from surface area of a few cm^2 on a colder-than-average extremity2. Also generate some uW (mW?) from spinning(?) a tiny coil around a permanent magnet(?)3. Store the energy in a battery the size of a fraction of a ring4. Beam stored energy to a smartphone wirelessly, at <20% efficiency (?) using a coil for induction the size of a precious stone in a ring5. Profit?? lolwutI blame the language barrier.

author: Raj
author_rank: Frequent Contributor
timestamp: December 15, 2020, 04:52:29 am
content: Is there some incentive for these companies to purpose foolish ideas?Here's mine....Quarts based phone case so every time you drop your phone, it gets a little more charged up.Jokes aside... if they were serious about making their phones last longer, they would make their phones thicker than the camera bump. (for bigger battery and protection for camera lens.)

author: PlainName
author_rank: Super Contributor
timestamp: December 15, 2020, 08:08:55 am
content: QuoteYes. Stops someone else taking advantage and, you never know, it might work out in the end.But I see the charging business as something they're not serious about but which gives them a reason for patenting the ring. The interesting part is the self-generation of energy, which could be useful for things other than charging. No, not 'could'; 'would'. Maybe it's enough charge to transmit something to the phone, or receive something (perhaps a tingle on incoming call).Don't forget that there are battery-less switches that work just fine to remotely turn on and off lights, etc (got on on my office, and it's brilliant). No doubt when that technology was first conceived your average techy laughed at the idea of not just generating some power when a switch is pressed (just think of the distance moved and how you'd need fingers of steel to be able to press it), but enough power to transmit a radio signal to boot!

author: Haenk
author_rank: Super Contributor
timestamp: December 15, 2020, 03:06:34 pm
content: I knew I read something about this years ago, and voilà, this predates the patent by 5 years:https://phys.org/news/2015-11-self-powered-e-watch-powered-wrist-movements.htmlAnd I'm sure there were some generator-based watches before. But the above combine both heat and movement conversion...

author: AVGresponding
author_rank: Super Contributor
timestamp: December 15, 2020, 08:20:06 pm
content: The Seiko Kinetic system was introduced in 1986...

author: Raj
author_rank: Frequent Contributor
timestamp: December 17, 2020, 10:58:51 am
content: Quote from: Haenk on December 15, 2020, 03:06:34 pmThey didn't quote how heavy the mechanism inside it is, or how many milli watt hours per wrist stroke it generates

author: Cyberdragon
author_rank: Super Contributor
timestamp: December 17, 2020, 09:39:16 pm
content: Quote from: AVGresponding on December 15, 2020, 08:20:06 pmYep, generator watches have been a thing for a long time, they use the same counterweight mechanism as a autowind mechanical but just use it to charge an electric watch instead. They even showed the construction of one type on How It's Made IIRC. Nothing new, just a really overcomplicated and stupified version of existing tech because "we have to be new and exciting!"with the typical BS of charge your phone and whatnot. NO, you cant, and there are plenty of movement powered electric watches out there even with fancy electronic features that there's no need to try and reinvent the wheel, you aren't gonna end up with a BTTF hover converter.https://en.m.wikipedia.org/wiki/Automatic_quartz.

author: PlainName
author_rank: Super Contributor
timestamp: December 18, 2020, 12:45:13 am
content: QuoteHow is running a quartz watch without batteries 'overcomplicatied and stupified version' of, presumably, a self-winder? Or are you saying the mechanical version is overcomplicated and stupid? Either way, I think your disparaging remark is unwarranted.

author: Cyberdragon
author_rank: Super Contributor
timestamp: December 18, 2020, 03:39:32 am
content: Quote from: dunkemhigh on December 18, 2020, 12:45:13 amThis Samsung thing!

author: PlainName
author_rank: Super Contributor
timestamp: December 18, 2020, 07:29:23 am
content: Ah! That wasn't very clear.

author: amyk
author_rank: Super Contributor
timestamp: December 18, 2020, 08:12:18 am
content: The power needed to run a quartz movement or even a traditional mechanical one is a few orders of magnitude less than what a completely idle smartphone (screen off, but still on standby) consumes. It's probably even less than the self-discharge of the battery in the latter.

author: cdev
author_rank: Super Contributor
timestamp: December 30, 2020, 03:09:05 am
content: I think the whole thing would be explained by a policy where a company (could be any company) promoted and/or paid employees based onhow many inventions they patentedfor said (employer)