They're related, to make things more complicated, see Maxwell.
Most modern PM's are actually much more resistant to RF induction than one from strong magnetic fields mainly due to the saturation of the RF spectrum over the past 2 or so decades coupled with a decline in high voltage power in populated areas (they are underground as well as farther from residential areas these days).
That said I have no idea if the field those things generate is strong enough to create any issue with PM's or similar devices (like the "jump start" internal defibrillator some people are getting these days).
I would think that these devices are quite safe, especially considering that you see wireless charging station in courtesy area's in lobbies and other public places without any warning signs.
But there are guidelines for certifying consumer electronics compatibility with medical devices is on that list.
Seems like the difference is in how spatially localized the two are, and % magnetic power vs electric.
Presumably though there is probably some way to drive (or receive) the wireless charger in a dangerous way so you can microwave things from a distance :p
For electromagnetic, the waves are propagating (oscillating electric and magnetic moving through space) and the coupling between receiver and transmitter is weak (ie. loading the receiver has no effect on the transmitter).
Both are governed by Maxwell's Equations. Sometimes you'll hear these referred to as "near field" and "far field" -- though those definitions are nebulous in terms of modeling the coupling.
The near field systems rely on both coils being within about one radius of one another, and the coils are typically self resonant, but the smaller you make the coil, the higher it's self resonance, thus it's efficiency is lower. That's the issue with resonant near field coupling, the small devices like phones limit the coil size, and efficiency. Near field demo:
See those laminates at the edges? They're 'open' for that same reason, that way the magnetic field goes through the coils rather than that it heats up the steel and generates waste heat.
(that's from a windmill I built, diameter is ~ 12").
So I'd stay clear until we have a definitive source that has actually tested it to prove Qi chargers don't interfere with pacemakers. It isn't worth your life because some random poster on the internet told you there was nothing to worry about.
The prime concern is that oscillating fields could interfere with the low-voltage low-current stimulus leads, inducing convulsions or worse. Secondary concern is overloading & frying the device.
I knew there was something I was going to ask my cardio doc a few days ago...we discussed potential problems with electric cars instead (user's manual is filled with "Warning! Pacemaker users stay away so we don't have to get this car medically certified!"-type notices).
Unfortunately, they do not work reliably with my Nexus 4. After putting the phone on the charger it does start charging, but cuts off after a couple of seconds and the charger starts flashing its LED (which is supposed to indicate an error). The phone did not charge at all last night on the charger. I don't know if this is an issue with my Nexus 4, which is already bit beat up, or if there is some kind of incompatibility...
Anybody have any experience with these kind of wireless chargers? Are there compatibility issues?
> Nexus 4: One inch (25mm) below the center of the phone
What was weird about it was that it would only repro on certain outlets - if I plugged it in on the other side of the room, it would work just fine. It also didn't repro with any other phones.
I would guess there was something else on the original circuit that was dirtying the power enough that the charger couldn't use it on certain phones - but I never did find the root cause.
My guess is that either there's a serious design flaw in the Nexus 4's inductive charging, or it just has a very high defect rate.
I suspect a wireless charger's function is simple enough to become foolproof. Wired chargers are mostly foolproof already.
I have tried to position the phone in various ways, but the result is always the same. Question now is: is the N4 flawed or is the Ikea QI flawed?
The likes of Starbucks are already offering wireless charging, McDonald's is slowly rolling out wireless charging (currently only in the UK). Eventually almost everywhere you go there will be a charger. I think wireless charging is one of the more exciting things to happen in a while (even though the tech has been around for a long time).
See https://www.apple.com/batteries/why-lithium-ion/ for example.
(You can tune these in ThinkPads, http://linrunner.de/en/tlp/docs/tlp-faq.html#battery)
IKEA is using Qi. Starbucks is using Powermat. Uh oh.
We're headed for a Blu-Ray/HD-DVD problem.
Duracell Powermat is effectively just Qi with proprietary advertisement and tracking codes (light DRM) added on to it. As far as I can tell, it only exists because Duracell keeps throwing money at it.
This isn't a Blu-Ray/HD-DVD problem. It's more like a CD vs MiniDisc fight. Or a USB vs Lightning fight.
If I were interested in this Ikea furniture (I can't say that I am, from the looks of it), I'd be happy since the phones in my household are both Nokias which use Qi. So I suppose I am on "Team Qi" and must naturally consider all of the competing standards to be inferior. That's how this is supposed to work, right?
Joking aside, wireless charging plates are amazingly convenient and I love that Ikea is putting them directly into furniture, even if these particular pieces do not yet strike me as suitable for my house. Presently, I have Qi plates at our desks, at the side table by the couch, and on the night stands. I would be in favor of plates that were there but couldn't be seen, for a slightly sleeker aesthetic.
For several years, I drove a MINI E electric car. Since then, I've been of the mind I will never again buy an ICE vehicle. ICE is dead to me. The same has happened with wireless charging. I will never buy a cell phone that requires I fidget with a wire to charge it. Connecting a wire is dead to me.
I am baffled that laptops and tablets are still behind the wireless charging curve. I want to drop my Surface on a charging plate.
So be it.
I still want the convenience of wireless charging for my tablet/laptop. Here's the thing: my devices that charge wirelessly are in practice more often charged than those that require a wire. The speed of charging with a wire is immaterial if by requiring a wire, you have reduced the frequency of charging.
And if it's about efficiency (cost) of charging, then fine, let me know it will use a bit more electricity. I'm still going to do it. I've got way bigger fish to fry there.
Just look this Intel demo :
I ordered a HP Elite X2 1011 with WiGig a while ago and plan on getting a pair of wireless docks, one for home, and one for work.
Missing in my equation is a built-in solution for wireless charging, but after watching this I'm hopeful that a minimally intrusive accessory will provide that functionality in due time.
Essentially most of this furniture won't work with the vast majority of phones, only the small handful that support wireless charging, and those are typically flagships.
That said, wireless charging doesn't feel to me like a "flagships only" feature. I've been using Qi with my Lumia 920 for 2 years now; this doesn't seem like a flagship phone, but perhaps it was when I got it?
You obviously didn't even open the link - the very first thing you see on page 1 is a Samsung (Galaxy S4, I think?).
I've built a Nokia Qi charger into my desk (now used with my Galaxy S5) but the oblong form-factor of the coil and charger circuit did not lend itself to easy installation.
The round product looks perfect for retrofitting existing work desks, plus the price (as usual with Ikea) is quite competitive.
Subjectively I've never found IKEA prices to be particularly compelling once you look past the cheap and flimsy chipboard stuff they put near the doors to wow visitors.
Durability has a price no matter who sells it.
For example a solid-wood bedframe is $1000
Genuine question. Does anybody know if any makers are doing this/thinking about doing this?
And to repeat the tired meme, once Apple releases an iPhone that does have wireless charging, it will be heralded as the dawn of wireless charging.
The other day there was some iCloud announcement about how if you take a picture on one device it will automatically sync to the other devices...and my mind was blown because if it wasn't doing that before what was the point of iCloud? I give the other phones too much credit I guess.
That's definitely not accurate, the 30-pin connector was introduced in 2003 and wasn't replaced until 2012.
They did skip DisplayPort though.
another charging hack was putting a 5 port usb hub in the middle of my couch cushions and running the power behind them to have usb ports for charging when i wanna zone out and play xbox for half the day.
The modular aspect is good; the ones that are not modular, and not of a style you like, meh.
But more importantly there's so much more that could be done. Let's home they take this much farther. Networking, sensing, energy management, displays, ergonomics, use of vertical space...
Seems like furniture is hugely ripe for disruption, and this will at least open some eyes to the possibilities.
The latter is a little more advanced. It uses magnetic resonance, so the target device can be at a small distance from the charger coil. This means that you can put the charger under a wooden board, and the device being charged on top of the board. Thus, a charging enabled table will look exactly like any other table and will not have an ugly plastic target on it.
Furthermore, the device being charged does not have to be exactly aligned, so no tacky plus signs. You can also charge several devices at one time.
What we have here is an interim half-way solution that will mostly give wireless charging a bad name for a while.
I've tried this with a Nexus 6 (built in charging) and a Note 3 (add on cover) - in both cases the charger couldn't keep up with the discharge rate. Sure, the battery drained more slowly than would otherwise have been the case, but it's not a brilliant solution.
Perhaps phones will get me efficient in future, or maybe Qi will one day be as fast as USB charging. For now, the convenience is outweighed by crappy performance.
To maximize the power transfer, I would recommend:
1) Use a charger with 3 coils instead of 1
2) Don't use a cheap car outlet USB adapter. Get a nice one with at least 2A available per port. The nice ones are actually isolated to reduce interference with FM radio, too.
3) Use a very thin case, or no case at all on your phone.
Source - http://pressroom.lexus.com/releases/lexus+2015+nx+200t+300h+...
They either need to allow the phone's video output to be displayed on the in-car LCD (and for touch actions on the LCD to be relayed to the phone), or my preferred option just add a damn screw hole to every dashboard, so we can just screw in a GPS holder (or other accessories) and it will never ever fall off.
But around here the temp' falls to well below freezing in the winter to sometimes one hundred degrees (F) in the summer.
I just don't think suction cuffs are the best idea for this application in general. Phones are relatively heavy, cars shake from side to side, and temperature weakens the suction.
For a $1 screw thread in a hole which the manufacturer of cars could add trivially in seconds, it just seems like this should be a solved problem by now.
Otherwise, get one that is sticky, or one that connect to your dashboard.
I'm an Android developer who just bought the new iPhone 6 and can't believe I'll have to plug it in every time to charge it.
I, like most people, use coffee tables, side tables, etc. to hold drinks which occasionally get condensation or spill. Would this cause any electrical hazard?
Not sure if it's adding functionality but rather convenience. I think the goal of "charging furniture" is to pick up a collection of small charges over the day that remove the need for dedicated "inconvenient" charging times. So instead of tracking battery life and anticipating your future use and eventually coming to a point where you say "OK, now is is a good combination of low battery and convenient timing to plug my phone in and charge it" you just put it down when you sit down and magically you have a phone that lasts much longer before it needs a period of dedicated charging time.
When I got a wireless charging pad that was how I was hoping it would work. Except it didn't because it's a small pad and the phone has to be placed precisely on it and it makes an obnoxiously loud beep when charging begins. Since using it requires a mental decision and never really flows seamlessly, I really only find myself using it when I would use a charging cord anyway. But maybe the implementation in furniture may change that.
Just make the charging area large enough that I can drop it on the spot correctly on the first try reliably. (It takes me two tries on average with my current pad.)
And like it or not, most new Android phones don't even have replaceable batteries, so the number of users with oversized batteries is getting smaller and smaller.
There's a whole section for them at Best Buy, they're hardly a niche product.
Rezence's (now also Powermat's) technology I think makes more sense for something like this.
I thought that too, until I used one. I have a charging mat on my desk, so without even thinking about it now, every time I sit down I put my phone on the pad and it starts charging. Given that I get up and sit down a lot during the day (for meetings, etc) not having to fuss around with plugging in a charging cable (a two handed operation) is a blessing.
Yes, it's an absolute first world problem, but IMO charging mats are well worth it. It's just a shame that Apple still doesn't build in support for them. That said, docks have much the same effect, albeit with more breakable parts.
But personally, there's one much bigger reason wireless is so much better than USB: Qi doesn't wear out your USB jack. After plugging & unplugging my phone at least once a day for a year or two (and occasionally bumping it while plugged in), the USB jack eventually became an extremely finnicky, barely-usable pain in the ass.
When I am getting ready for bed I take my phone out of my pocket and put it on the charger, and go change into my pajamas. Then, later, while laying in bed, I might decide to read something so I pick up my phone and read. If I get an early morning phone call, I can grab my phone with my eyes closed and answer it. Admittedly a long cable might make those use cases workable.
My friend has his charger on his desk at work and doesn't charge the phone at home. If I knew that the Nexus line were going to stay magnetic, I'd have one in my car mounted upright as well as one on my desk at home and work.
I agree in terms of effort, the change is minimal, but consider a family who has 3 or 4 different devices and hence ports,. required to charge.
This means I don't need to hunt down the proper cord, we just have a couple of these devices at the front door. To me, that's eliminates a large pain in the ass.
At work no one needs to ask if someone has a black berry version 3 cord, or a "new style" Samsung galaxy cord, or the latest iPhone charging cable, you just put your phone down and walk away:)
it's a first world problem that is being solved here, but it's a big one that doesn't appear to be going away. European posturing aside.
Well, if you've ever had a port or cable break on you, you should know why.
It doesn't have exposed wires or moving parts, which means it should be much harder to break. Micro-usb is only rated for 10k insertions. If you plug your phone in 10 times a day, that's 2.5 years, and Galaxy S3's are quickly coming up on that old.
I have a Qi charger at my bed, in my computer room, car and work desk... I can just set my phone down at any of those places and not worry about fudging with wires (also have bluetooth headsets lying around).
I've had to replace phones due to broken/worn out jacks.
Having bought a Tylt Vu easel-style wireless charger I disagree.
It's far more convenient to have the charger on my nightstand. I don't have to have a USB cord dangling around. I also don't have to fumble with it in the dark if my wife goes to bed before I do. It seems to be a law of nature that you can never plug in a USB cord the right direction the first time around.
Having only used devices using Qi's standard, what's the difference?