Smartwatch ECG Electrode Contact Using a Conductive Resilient Sheet
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Solution Overview
Problem
The circuit conduction path connecting the ECG electrode and the touch electrode in smart watches has a complex structure, leading to insensitive ECG detection and poor user experience.
Innovation Solution
The electronic device incorporates a conductive resilient sheet to establish a conducting state between the second ECG electrode and a second branch of the ECG circuit board, simplifying the conduction path and improving sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a circuit conduction path is disposed inside the smart watch to connect ECG electrodes, then the ECG electrode and touch electrode can be in a conducting state, but the complex structure results in insensitive ECG detection
Solution Approach 1:
The circuit conduction path is segmented into multiple independent conductive components: a conductive resilient sheet disposed between the ECG electrode and circuit board, and separate conductive structures on the circuit board. This segmentation simplifies each component's function and improves overall conduction reliability by isolating potential failure points.
Solution Approach 2:
A conductive resilient sheet is introduced as an intermediary component between the ECG electrode and the circuit board. This resilient sheet ensures reliable electrical contact while accommodating mechanical movements and deformations of the smart watch housing, thereby improving ECG detection sensitivity without complicating the overall structure.
2Ease of operation
If the circuit conduction path is complex, then the ECG electrode and touch electrode can be connected, but the user experience deteriorates
Solution Approach 1:
The complex internal circuit conduction path is extracted and replaced with a simplified structure using the conductive resilient sheet that naturally conforms to the housing contours. This extraction eliminates unnecessary intermediate components and simplifies the conduction path, thereby improving ease of manufacture and reducing structural complexity while maintaining reliable ECG functionality.
Solution Approach 2:
A thin conductive resilient sheet is used instead of rigid complex circuit traces. This flexible thin film can adapt to the housing's shape and movement, ensuring continuous reliable conduction between ECG electrodes and the circuit board while simplifying the overall structure and improving manufacturing ease.
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
The simplified conduction path enhances ECG detection sensitivity and user experience by allowing for quicker and more reliable electrocardiogram data acquisition.
Implementation Method 1
The conductive resilient sheet is fixed inside the middle frame and configured to make the second ECG electrode and the second branch be in a conducting state
Data Source
AI summary
An electronic device includes a housing, a first electrocardiograph (ECG) electrode, a second ECG electrode, an ECG circuit board, and a conductive resilient sheet. The housing includes a back cover and a middle frame fixed with the back cover. The first ECG electrode is disposed at the back cover. The second ECG electrode is disposed at the middle frame. The ECG circuit board is disposed inside the back cover and inside the middle frame, and provided with a first branch electrically connected with the first ECG electrode and a second branch disposed adjacent to and extending toward the second ECG electrode. The conductive resilient sheet is fixed inside the middle frame and configured to make the second ECG electrode and the second branch be in a conducting state. The conductive resilient sheet is provided to make the second ECG electrode and the second branch be in a conducting state.