POWER SOURCE, CHARGING SYSTEM, AND INDUCTIVE RECEIVER FOR MOBILE DEVICES

• US 20170025896A1
• Filed: 10/03/2016
• Published: 01/26/2017
• Est. Priority Date: 06/01/2006
• Status: Active Grant

• Current Assignee: Mojo Mobility, Inc.
• Original Assignee: Mojo Mobility, Inc.
• Inventors: Partovi, Afshin, Sears, Michael
• Granted Patent: US 11,121,580 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06K 19/0704 the battery being rechargeable, e.g. solar batteries
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

A power source, charging system, and inductive receiver for mobile devices. A pad or similar base unit comprises a primary, which creates a magnetic field by applying an alternating current to a winding, coil, or any type of current carrying wire. A receiver comprises a means for receiving the energy from the alternating magnetic field and transferring it to a mobile or other device. The receiver can also comprise electronic components or logic to set the voltage and current to the appropriate levels required by the mobile device, or to communicate information or data to and from the pad. The system may also incorporate efficiency measures that improve the efficiency of power transfer between the charger and receiver.

Claims

1. A charger system for use with one or more mobile devices for charging or powering the one or more mobile devices inductively, comprising:

a base unit comprising primary coils, the primary coils having a generally planar shape; and

a power supply for passing an alternating current through a selection of one or more of the primary coils to generate a magnetic field in a direction substantially perpendicular to the plane of the primary coil,

wherein the perpendicular magnetic field is used to inductively generate a current in one or more secondary coils within one or more mobile devices placed close to the base unit, to charge or power the one or more mobile devices,

wherein, via an electronic inductive charging circuit, the selection of primary coils in the base unit appropriate to the one or more mobile devices is activated by

a short AC signal applied to each primary coil to detect one or more nearby secondary coils,

electromagnetic wave communication means, or

proximity sensors such as capacitance, weight, magnetic, optical or other sensors that can be used to detect one or more nearby secondary coils thereby initiating power transfer via the electronic inductive charging circuit and the selection of the primary coils, and

wherein during power transfer, the voltage input to the base unit or the duty cycle or frequency of the alternating current in the electronic inductive charging circuit is changed to provide appropriate power or voltage to the one or more mobile devices receiving power.