Ear-Worn Device Pairing via IMU Case Tap Detection
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Solution Overview
Problem
Current pairing methods for ear-worn devices, such as hearing aids, are cumbersome and require a smartphone or computer for reestablishing pairing, leaving users without assistance if they are away from these devices.
Innovation Solution
A hearing assistance system that uses a charging case with an inertial measurement unit (IMU) to detect a vibration sequence generated by tapping the case on a hard surface, allowing ear-worn devices to pair wirelessly without a smartphone or computer, and includes a positive/negative indicator light to confirm pairing status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If Bluetooth Low Energy (BLE) technology is used for wireless communication between ear-worn devices and mobile devices, then power consumption is reduced and battery life is extended, but connection reliability and stability deteriorate due to BLE being a lossy protocol with packet loss
Solution Approach 1:
The patent introduces an intermediary pairing system that mediates between the BLE communication layer and the pairing process. This system captures pairing requests, generates standardized pairing codes, and manages the pairing state machine, thereby stabilizing connections without requiring changes to the underlying BLE protocol or increasing power consumption.
Solution Approach 2:
The patent implements preliminary actions by pre-generating pairing codes, pre-establishing pairing states, and pre-configuring connection parameters before actual device pairing occurs. This preparation work reduces connection instability during the pairing process itself without requiring additional power during active communication.
2Device complexity
If manual pairing processes are used for ear-worn devices, then device complexity is reduced, but ease of operation deteriorates due to users needing to manually enter pairing codes and navigate settings
Solution Approach 1:
The patent implements self-service pairing where the system automatically generates pairing codes, displays them on the user interface, and completes the pairing process without requiring manual user input. The ear-worn device and mobile device automatically exchange pairing information and establish connections through the standardized pairing system, making the process as simple as bringing devices close together.
Solution Approach 2:
The patent creates a universal pairing system that works across different device types and operating systems through standardized protocols. This multi-functional pairing framework handles various pairing scenarios (new device pairing, re-pairing, group pairing) through a single unified interface, reducing operational complexity while maintaining ease of use.
3Ease of operation
If pairing codes are displayed on small ear-worn device screens, then ease of operation improves by showing codes directly to users, but manufacturing precision requirements increase due to the need for small, readable displays
Solution Approach 1:
The patent shifts the display dimension from the constrained ear-worn device screen to the larger mobile device screen. The ear-worn device transmits pairing codes to the mobile device, which then displays them in a large, readable format. This dimensional shift eliminates the need for high-precision small displays in ear-worn devices while maintaining code visibility and ease of operation.
Solution Approach 2:
The patent uses the mobile device as an intermediary display medium. Instead of requiring the ear-worn device to directly display pairing codes on its limited screen, the system uses the mobile device's larger display capabilities to present the codes to the user, thereby avoiding stringent manufacturing precision requirements for the ear-worn device display.
4Ease of operation
If wireless earbuds are designed to be small and lightweight for comfort, then ease of operation improves by enabling wireless portability, but reliability deteriorates due to limited battery capacity and antenna size
Solution Approach 1:
The patent segments the system into two parts: the small ear-worn device that maintains connection stability through the standardized pairing protocol, and the mobile device that handles complex pairing operations and provides power reserves. This segmentation allows the earbuds to remain small and portable while the overall system maintains reliability through the mobile device's greater resources.
Data Source
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AI summary
A hearing assistance system and method are described herein. The system includes a first ear-worn device, a second ear-worn device, and a case. The system is configured to detect a vibration sequence at an IMU and decide whether to pair wireless communication devices of the first and second ear-worn devices based on the vibration sequence detected at the IMU.