Architecture of portable electronic devices with wireless charging receiver systems

A portable electronic device, comprising:

• a housing comprising a top portion including a display and a bottom portion including a window, the bottom portion is configured to mate with the top portion to form an internal cavity, wherein the window includes a plurality of ink layers coated on portions of an inner surface and an outer surface of the window;
• a spacer disposed within the internal cavity and comprising a non-conductive material, the spacer having an opening disposed at the center of the spacer and defined by an inner edge of the spacer;
• a wireless charging receiver system disposed within the internal cavity and the opening, the wireless charging receiver system comprising a primary coil having an inner diameter and an outer diameter, a ferromagnetic shield covering a portion of at least two surfaces of the primary coil, and a secondary coil wound about overlapping portions of the primary coil and the ferromagnetic shield;
• a sensor module disposed within the internal cavity and the inner diameter of the primary coil, the sensor module comprising at least one sensing device configured to measure a parameter of an environment external to the portable electronic device;
• an alignment module coupled to the sensor module, the alignment module comprising an alignment magnet and a DC shield attached to a top surface of the alignment magnet;
• and
• an electromagnetic shield layer positioned between the wireless charging receiver system and the window of the bottom portion of the housing.

A wireless charging system, comprising:

• a first wireless charging transmitter comprising:
• a first housing having a first charging surface;
• and
• at least one first transmitter coil formed of a plurality of turns of stranded wire disposed within the first housing and below the first charging surface, the at least one first transmitter coil configured to generate first time-varying magnetic fields through and above the first charging surface;
• and
• a wireless charging receiver comprising:
• a housing comprising a top portion including a display and a bottom portion including a window, the bottom portion is configured to mate with the top portion to form an internal cavity;
• an antenna disposed within the internal cavity and comprising an antenna element and a conductive antenna body coupled to a bottom surface of the antenna element, the antenna having an opening disposed at the center of the antenna and defined by an inner edge of the antenna;
• a wireless charging receiver system disposed within the internal cavity and the antenna opening, the wireless charging receiver system comprising a primary receiver coil having an inner diameter and an outer diameter and configured to receive the first time-varying magnetic fields generated by the at least one first transmitter coil, a ferromagnetic shield covering a portion of at least two surfaces of the primary receiver coil, and a secondary receiver coil wound about overlapping portions of the primary receiver coil and the ferromagnetic shield;
• and
• a sensor module disposed within the internal cavity and the inner diameter of the primary receiver coil, the sensor module comprising at least one sensing device configured to measure a parameter of an environment external to the portable electronic device.