Apple receives patent for Smart Cover wireless charging system

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Date: Thursday, March 14th, 2013, 07:25
Category: Hardware, iPad, News, Patents

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It’s sort of a weird patent application, but apparently it’s been pushed through.

Per 9to5Mac, Apple on Thursday published an Apple patent application that details a system of inductively charging an iPad through the Smart Cover. The idea is that rather than plugging in the iPad, the Smart Cover would include an inductive power transmitter that would allow it to pair with an inductive power transceiver embedded into the iPad. The result is the Smart Cover would become a wireless charging station, connecting to an external power source, and allowing you to power your iPad in various positions. Apple also explained that it could use “ambient power gathering devices, such as solar cells, can be used to gather ambient power (such as sunlight) to be stored internally in the flap for later inductive transfer.”

A method for wireless powering a tablet device, comprising: determining if a protective cover is in a closed configuration with respect to the tablet device; enabling a wireless power receiver circuit in the tablet device when it is determined that the protective cover is in the closed configuration with respect to the tablet device; and wirelessly receiving power from a wireless power transmitter associated with the protective cover.

Apple described the advanced Smart Cover as including multiple power transmitters to allow the iPad to charge even when using the case, for example, as a stand to prop up the device. Alternatively, the cover could continue charging the device when in the closed position or when an iPad is placed on top:

The method as recited in claim 10, the method further comprising: determining that the tablet device is positioned relative to a flat surface at a viewing angle; and enabling a second wireless power receiver circuit only when it is determined that the tablet device is in the portable mode and is positioned relative to the flat surface at the viewing angle and the tablet device is configured to present video by the display. An apparatus for wireless powering a tablet device, comprising: means for determining if a protective cover is in a closed configuration with respect to the tablet device; means for enabling a wireless power receiver circuit in the tablet device when it is determined that the protective cover is in the closed configuration with respect to the tablet device; and means for wirelessly receiving power from a wireless power transmitter associated with the protective cover.

13. The apparatus as recited in claim 12, the tablet device further comprising; a battery; a display; and a sensor arranged to detect an external stimulus only when the protective cover is in the closed configuration with respect to the display.

The system described in the patent would be similar to wireless charging systems already available on the market, something that Apple’s Phil Schiller recently described as “more complicated” than Apple’s current solution:

As for wireless charging, Schiller notes that the wireless charging systems still have to be plugged into the wall, so it’s not clear how much convenience they add. The widely-adopted USB cord, meanwhile, can charge in wall outlets, computers and even on airplanes, he said. “Having to create another device you have to plug into the wall is actually, for most situations, more complicated,” Schiller said.

Stay tuned for additional details as they become available.

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