Apple Inc.

Jacob E Mattingley

Sneha Kadetotad

Behrooz Shahsavari

Eugene Antony Whang

Steven Porter Hotelling

Jared Mitchell Kole

Edward Siahaan

Daniel Ray Bloom

Phillip Qian

Dustin A Hatfield

Baboo V Gowreesunker

Joseph C Doll

Michael A Cretella

Yuta Kuboyama

Tian Shi Li

Rajesh Anantharaman

Siddharth Seth

Robert D Zupke

Edwin J Corona Aparicio

Douglas J Adams

Christopher S Erickson

Tsu-Hui Lin

J Stephen Smith

Audrey L Sheng

Weiyu Huang

Axit H Patel

Alex C Hellwig

Oliver M Hewitt

This disclosure includes several different features suitable for use in circumaural and supra-aural headphones designs. Designs that include earpad assemblies that improve acoustic isolation are discussed. User convenience features that include automatically detecting the orientation of the headphones on a user's head are also discussed. Various power-saving features, design features, sensor configurations and user comfort features are also discussed.

Headphones with magnetic sensor

A wireless power transmission system has a wireless power receiving device that is located on a charging surface of a wireless power transmitting device. The wireless power receiving device has a wireless power receiving coil and the wireless power transmitting device has a wireless power transmitting coil array. Signal measurement circuitry coupled to the coil array may make measurements while the control circuitry uses the inverter circuitry to apply excitation signals to each of the coils. Foreign objects on the coil array such as metallic objects without wireless power receiving coils can be detected using foreign object detection. When multiple wireless power receiving devices are present on the wireless power transmitting device, steps may be taken to isolate measurements from the coils associated with each wireless power receiving device. Foreign object detection may then be performed on these modified measurements.

Foreign object detection in wireless charging systems with multiple power receiving devices present on a power transmitting device

A wireless power transmitting device transmits wireless power signals to a wireless power receiving device. The wireless power receiving device has a rectifier and a wireless power receiving coil that receives wireless power signals. The wireless power transmitting device uses a layer of coils to transmit the wireless power signals. A dielectric layer in the wireless power transmitting device defines a charging surface that receives the wireless power receiving device. A layer of temperature sensors is interposed between the layer of coils and the dielectric layer. Control circuitry in the wireless power transmitting device uses temperature information from the temperature sensors to determine whether a foreign object such as a coin is present on the charging surface.

Wireless charging system with temperature sensor array

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Cupertino, CA, United States of America

Jacob E Mattingley