Wearable Sensing Module with Dual-Function Electrodes
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Solution Overview
Problem
Conventional wearable devices lack fingerprint recognition functionality, resulting in poor security.
Innovation Solution
A sensing module with interconnected first and second sensing electrodes, arranged in specific directions, and a driving chip with fingerprint recognition and touch functions, enhancing security by enabling fingerprint recognition and touch functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fingerprint recognition function is added to wearable device, then security is improved, but device complexity increases
Solution Approach 1:
The patent combines the fingerprint recognition function and touch function into a single sensing module. The sensing electrodes serve dual purposes: detecting fingerprint patterns for security authentication and detecting touch inputs for device operation. This merging eliminates the need for separate fingerprint sensors and touch screens, thereby reducing overall device complexity while improving security.
Solution Approach 2:
The sensing electrodes in the patent are designed to perform multiple functions simultaneously. The same electrode array detects both fingerprint ridges and valleys for authentication and touch pressure for interaction. This multi-functionality allows the device to gain security capabilities without adding dedicated components, thus avoiding increased device complexity.
2Measurement precision
If small sensing electrodes are used, then fingerprint recognition accuracy is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent divides the sensing area into multiple small sensing electrodes arranged in an array. Each small electrode corresponds to a specific region, allowing precise localization of fingerprint features. The segmented electrode structure enables accurate detection of fingerprint ridges and valleys while maintaining manufacturability through standardized electrode patterns that can be produced using conventional fabrication processes.
Solution Approach 2:
The patent optimizes the parameters of the sensing electrodes, including their size, spacing, and arrangement pattern, to achieve the right balance between detection accuracy and manufacturing feasibility. By carefully selecting electrode dimensions and pitch, the system achieves sufficient fingerprint recognition accuracy while remaining compatible with standard manufacturing tolerances.
Data Source
AI summary
A sensing module and a wearable device having same are disclosed. Wherein the sensing module comprises sensing electrodes, including a plurality of first sensing groups and a plurality of second sensing groups, wherein a width of the electrodes in the first sensing groups and a width of the electrodes in the second sensing groups are both less than a predetermined width; a driving chip, respectively connected to at least some of the first sensing groups and at least some of the second sensing groups. The driving chip has a fingerprint recognition function and a touch function.