Dual-Use Hearing Instrument Antenna for Capacitive Touch Control
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Solution Overview
Problem
The challenge in hearing instruments is the limited space for both an effective wireless communication device antenna and a capacitive control unit, often leading to interference and inefficient use of installation space, particularly in ITE devices.
Innovation Solution
The antenna of the wireless communication device is designed with two galvanically separated sections that also function as the electrode arrangement for the capacitive control unit, operating at different frequencies to prevent interference, and is optimized for compact size and efficient space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate antenna and electrode arrangement are provided, then wireless communication and capacitive control functions are both achieved, but device complexity and space requirements increase
Solution Approach 1:
The patent combines the antenna and electrode arrangement into a single integrated structure. The antenna elements serve dual purposes: wireless signal transmission/reception and capacitive sensing for control. This merging eliminates the need for separate components, reducing device complexity while maintaining both wireless communication and capacitive control functionalities.
Solution Approach 2:
The antenna structure is designed to perform multiple functions simultaneously. It serves as both the wireless communication antenna and the electrode arrangement for capacitive control. This multi-functionality allows a single component to fulfill multiple roles, thereby reducing the overall number of components needed in the hearing instrument.
2Area of stationary object
If antenna and electrode arrangement are placed close together, then space utilization improves, but signal interference occurs
Solution Approach 1:
The antenna is divided into multiple galvanically separated sections or elements. This segmentation allows each section to be independently controlled and optimized. By maintaining galvanic separation while achieving spatial proximity, the design enables close placement for space efficiency while preventing signal interference through electrical isolation between sections.
Solution Approach 2:
Different sections of the antenna are designed with specific local characteristics optimized for their particular functions. Each section can have tailored electrical properties, dimensions, and configurations to optimize either wireless communication or capacitive sensing performance locally, while the overall structure maintains compactness.
3Object-generated harmful factors
If antenna sections are galvanically separated, then signal interference is reduced, but electrical connection complexity increases
Solution Approach 1:
The patent introduces an intermediary coupling mechanism between galvanically separated antenna sections. This intermediary structure provides the necessary electrical connection for signal transmission while maintaining galvanic isolation to prevent interference. The intermediary element acts as a bridge that enables functional connectivity without direct electrical contact, thus reducing interference while managing connection complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design allows for simultaneous effective wireless communication and capacitive control without interference, enhancing the functionality and space efficiency of hearing instruments.
Implementation Method 1
an antenna electrically connected to the transmitting and receiving unit; the antenna having two antenna sections that are galvanically separated from one another
Implementation Method 2
a capacitive control unit with a control and evaluation circuit and an electrode arrangement electrically connected to the control and evaluation circuit
Implementation Method 3
a user's finger that is brought close to the electrode arrangement or placed on the corresponding point of the housing changes the (electrical) capacitance of the electrode arrangement in a characteristic manner through interaction with the alternating electric field
Data Source
AI summary
A hearing instrument has a housing to be worn behind or in a user's ear. The housing contains a wireless communication device with a transmitting and receiving unit and an antenna electrically connected thereto, and a capacitive control unit with a control and evaluation circuit and an electrode arrangement electrically connected thereto. The antenna of the wireless communication device and the electrode arrangement of the capacitive control unit are one and the same. The antenna has two antenna sections that are galvanically separated from one another and the two antenna sections are separately connected to the capacitive control unit and form different electrodes of the electrode arrangement.