Method for Inductive Charging of a Headset Battery Using the Speaker Coil
Publication Date: 2003-Mar-20
The IP.com Prior Art Database
5,959,433: PATENT [+2]
This concept would allow device battery recharging without the need to complete any direct electrical connection between the device (headset or handset) and its power adapter or base station. It is possible to safely and easily transfer relatively low amounts of power (i.e. enough for a low power headset) using an inductive coupling method where no direct electrical connections are needed. This charging/connection method is previously disclosed and understood. (See patent filings such as 5,959,433 and 5,903,134.) The aspect which is new in this disclosure is the concept to design the headset device such that the existing speaker coil can be used as the pick-up coil for the charging circuit on the device side. Within the headset would exist a circuit for rectifying the induced voltage on the two speaker wires and charge the battery(s).
Title: Method for Inductive Charging of a Headset Battery Using the Speaker Coil
This concept relates to power transmission; specifically inductive power coupling with no exposed electrical contacts.
Description of the problem this invention solves:
Any rechargeable battery powered device typically has to allow a method by which to connect and deliver the power to a discharged battery.� This often requires specific mechanical connectors or interfaces that will complete the electrical circuit to allow power transmission to charge the battery.� These connectors are often complex or unsightly due to the need to design a contact method that is durable and protects a user from exposure to any electrical contacts or interface during device usage and/or periods of device battery charging.� This concept would allow device battery recharging without the need to complete any direct electrical connection between the device (headset or handset) and its power adapter or base station.
Previous Solutions for the Problem
There are numerous prior solutions or solution attempts that address power connection for battery charging.� There are specific prior solutions which even utilize an inductive charging method as described here.� The uniqueness of this concept is to leverage the design of a headset speaker, which already contains a wound conductive coil, to transfer power to a battery charge circuit in the headset.
Description of the Invention � � � � � � �
It is possible to safely and easily tran...