# US 12,003,121 B2 · Detection of object location and orientation on a wireless charge mat > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,121 B2 - Document ID: US12003121B2 - Status: Granted - Kind: B2 - Application number: 17/389,124 - Filed: 2021-07-29 - Published: 2021-11-18 - Granted: 2024-06-04 - Earliest claimed: 2016-09-21 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Chad A. Bossetti; Christopher S. Graham; David W. Ritter; Todd K. Moyer; Steven G. Herbst; Shimon Elkayam; Nileshbhai J. Shah; Stephen C. Terry; Zaki Moussaoui - Web page: https://patentgrep.com/patent/US12003121B2 ## CPC - H02J 50/90: involving detection or optimisation of position, e.g. alignment - G01D 5/16: by varying resistance - G01D 5/20: by varying inductance, e.g. by a movable armature - G01D 5/24: by varying capacitance - H02J 50/10: using inductive coupling - H02J 50/12: of the resonant type - H10N 30/302: {Sensors} - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR - H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR ## Abstract A wireless charging mat and method of operating the same. The wireless charging mat includes a detection system configured to determine a location and an orientation of an electronic device on the wireless charging mat. The location and orientation are determined based on detected locations of one or more structural features of the electronic device. The wireless charging mat is operated according to the detected location and orientation. ## Claims ### Claim 1 A wireless power transmitting device configured to transmit wireless power to an electronic device having first and second resonant structures, comprising: a surface configured to receive the electronic device; a detection system configured to detect the first and second resonant structures in the electronic device and to detect a foreign object on the surface; and circuitry configured to transmit wireless power to charge the electronic device in response to the detection system detecting the first and second resonant structures and the absence of a foreign object. ### Claim 2 (depends on 1) The wireless power transmitting device of claim 1, wherein the first and second resonant structures have different resonant frequencies. ### Claim 3 (depends on 2) The wireless power transmitting device of claim 2, wherein the detection system is further configured to determine a type of the electronic device based on the different resonant frequencies. ### Claim 4 (depends on 1) The wireless power transmitting device of claim 1, wherein the detection system is further configured to: determine locations of the first and second resonant structures across the surface; and determine an orientation of the electronic device based on the determined locations of the first and second resonant structures. ### Claim 5 (depends on 4) The wireless power transmitting device of claim 4, wherein the detection system is further configured to determine a location of the electronic device based on the determined locations of the first and second resonant structures. ### Claim 6 (depends on 1) The wireless power transmitting device of claim 1, wherein the first resonant structure comprises a first inductive coil in the electronic device. ### Claim 7 (depends on 6) The wireless power transmitting device of claim 6, wherein the second resonant structure comprises a second inductive coil in the electronic device. ### Claim 8 (depends on 1) The wireless power transmitting device of claim 1, further comprising: a coil that is used to transmit wireless power to the electronic device. ### Claim 9 (depends on 8) The wireless power transmitting device of claim 8, wherein the detection system is configured to use the coil to detect the first and second resonant structures in the electronic device. ### Claim 10 (depends on 1) The wireless power transmitting device of claim 1, further comprising: a coil, wherein the detection system is configured to use the coil to detect the first and second resonant structures in the electronic device. ### Claim 11 (depends on 10) The wireless power transmitting device of claim 10, wherein the detection system is configured to use the coil to detect the first and second resonant structures in the electronic device by: using the coil to transmit signals; detecting a first response of the first resonant structure in response to the signals; and detecting a second response of the second resonant structure in response to the signals, wherein the detection system is configured to use the first and second detected responses to detect locations of the first and second resonant structures. ### Claim 12 (depends on 11) The wireless power transmitting device of claim 11, wherein the signals being transmitted by the coil to detect the first and second resonant structures comprise pulse signals. ### Claim 13 (depends on 1) The wireless power transmitting device of claim 1, further comprising: a coil, wherein the detection system is configured to detect the foreign object by: using the coil to transmit signals; detecting a response to the signals; and determining that the foreign object is on the surface of the wireless power transmitting device based on the response. ### Claim 14 A wireless power transmitting device configured to transmit wireless power to an electronic device, wherein the electronic device has an inductive power transfer coil and at least one resonant structure surrounding the inductive power transfer coil, wherein the wireless power transmitting device comprises: a detection system configured to detect the inductive power transfer coil of the electronic device and the at least one resonant structure surrounding the inductive power transfer coil of the electronic device; and circuitry configured to transmit wireless power to the electronic device via the inductive power transfer coil in response to the detection system detecting the inductive power transfer coil of the electronic device and the at least one resonant structure surrounding the inductive power transfer coil of the electronic device. ### Claim 15 (depends on 14) The wireless power transmitting device of claim 14, wherein the at least one resonant structure comprises an additional inductive coil. ### Claim 16 (depends on 14) The wireless power transmitting device of claim 14, wherein the detection system is further configured to determine a type of the electronic device based on a resonant frequency of the at least one resonant structure. ### Claim 17 A wireless power transmitting device configured to transmit wireless power to an electronic device having an inductive coil and at least one non-charging structure surrounding the inductive coil, comprising: a detection system configured to detect the inductive coil and the at least one non-charging structure surrounding the inductive coil; and circuitry configured to transmit wireless power to charge a battery in the electronic device in response to the detection system detecting the inductive coil and the at least one non-charging structure. ### Claim 18 (depends on 17) The wireless power transmitting device of claim 17, wherein the detection system is further configured to determine a type of the electronic device based on a location of the at least one non-charging structure in the electronic device. ### Claim 19 (depends on 17) The wireless power transmitting device of claim 17, wherein the at least one non-charging structure comprises at least one resonant structure.