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Silicon Valley youngster Pi on Monday claimed it had developed the world's first wireless charger that does away with cords or mats to charge devices.
Pi chargers, about the size of a small table vase, operate on standard charging technology used in Apple or Android smartphones designed to be powered up wirelessly.
But instead of cords or mats, the conical creation charges smartphones with magnetic waves.
Magnetic fields are an ideal way to safely send energy to portable electronics, said Pi chief technology officer Lixin Shi, who co-created the charger with John MacDonald.
The trick was bending magnetic waves to find smartphones, the co-founders said during a presentation for an AFP journalist at the TechCrunch Disrupt startup scrum in San Francisco.
[...] The pair figured out how to shape the magnetic field so energy could be beamed to smartphones placed or in use within a foot of a Pi.
(Score: 1, Insightful) by Anonymous Coward on Tuesday September 19 2017, @11:12PM (5 children)
"bending magnetic waves" my ass.
If they *could* do that without the help of a big chunk of 1860s style forged iron (or a 1990s style supercooled magnet of even more stupendous proportions), they'd have a Nobel price already. And we'd have heard about it through Arxiv and not through their press statement.
If this isn't VC bait, I'll buy two working ones in 6 months ROTFL
(Score: 0) by Anonymous Coward on Tuesday September 19 2017, @11:35PM (1 child)
Have you ever tried to pay for shit while rolling around the ground? Good luck bub.
(Score: 5, Funny) by MostCynical on Wednesday September 20 2017, @01:27AM
Well, if he's rolling on a contactless paypoint, with his credit cards in his pocket, he could pay several times..
"I guess once you start doubting, there's no end to it." -Batou, Ghost in the Shell: Stand Alone Complex
(Score: 3, Interesting) by c0lo on Tuesday September 19 2017, @11:54PM (2 children)
I don't know how this apply specifically to "wireless charging of current mobiles", but have you heard of phased array [wikipedia.org]?
Even if they'd have parasitic maxima/minina, with enough individual emitters you can concentrate the majority of the EM energy inside a (neighboring) space region and have the parasitic ones fall under a threshold.
Go into 10GHz range, the half wavelength antenna is 1.5 cm - simplistically, you can deploy about 5 of them on the apparent height of that cone (shown by TFA) if you orient them vertically.
Other geometrical arrangements for the emitting dipoles may be more efficient - eg at 45deg on the cone generator, use two interlaced phased arrays with orthogonal orientation, power/phase them as needed.
https://www.youtube.com/watch?v=aoFiw2jMy-0 https://soylentnews.org/~MichaelDavidCrawford
(Score: 2) by jcross on Wednesday September 20 2017, @12:50AM (1 child)
Or even more simplistically, who's to say it isn't just mechanically orienting its coils or something to that effect? There could even be a mu-metal shield involved. I'll admit the cone would be a crappy shape for that sort of arrangement though.
(Score: 0) by Anonymous Coward on Wednesday September 20 2017, @01:56PM
i think with a dual umbrella shaped mu-metall funnel you can pretty much "pour" the magnetic field of earth into a battery ...