2012年12月2日 星期日

Wireless Charging in the future?

Wireless charging, although it's not a very hot topic being discussed, some big companies are looking into the possibilities of promoting it.



Currently there are two boards with their own standards:
Wireless Power Consortium (WPC), promoting the Qi Standard. Some mobile companies have already included Qi into their latest mobile phones, like LG Nexus 4 and Nokia Lumia 920. If your mind automatically filtered these two, there are a few more: Sony, Samsung and HTC.
Power Matters Alliance (PMA), supporting companies include AT&T, Google, Starbucks, Duracell and General Motors. This alliance is a little younger than WPC.
But from a post and some others, these two standards are very similar but incompatible with each others, which said here.

LG Nexus 4:
If you haven't heard of this, it's the work between Google and LG, just like the Samsung Nexus S between Google and Samsung.
There are a few wireless chargers released during the release, but Google nor LG seem to advertise the wireless charging feature very much. I guess they are waiting until the infrastructure is completed, having more wireless chargers set up in public places. Just like what they did with NFC.
Here are a few posts from here and here. The LG charger is still dumb, the orientation of the phones aren't flexible enough. Users can't just causally place it on top of the wireless charger because there may have an occasion that the phone hasn't coupled with the charger yet.

Nokia Lumia 920:
Nokia has a page that briefly introduces the wireless charging.

This's the video clip that talks about the wireless charging feature during the Nokia World 2012 happened a few months ago. They are saying that when [the Wireless Power Consortium] signing partnerships with others, Lumia 920 (and actually other devices with Qi-standard) can be charged in different places, like coffee shops or even on planes. But the fact is: now Starbucks is with PMA on the Google side now. Let's see how it goes in the future.

Another video that hands-on with two other wireless chargers, Fatboy Charging Pillow and Nokia wireless charging stand. Around 00:44, the reviewer raised the phone a little from the charging pillow, you may see the charging icon disappeared for a second or two. Maybe the practical charging distance isn't too long after all.
The Nokia Wireless Charging Stand, the good is when you try to put your mobile onto the stand, there is only one single way of doing that, upright posture. It's less error prone in this way. But what's the differences between micro USB charging and wireless charging in this particular use case? I hardly see any.
I think the whole point is: wireless charging should let user charging their mobiles more causally and conveniently, but not just because there is a "wireless charging tech" leading to a production of poorly-designed wireless chargers.

Even if wireless power is banished in the end, at least people are dreamt of it,  charging through the thin air, right? :P

FYI, Apple also gets a few about the wireless+power thingy, posted here a year ago.