Wearable Defibrillator Display Orientation Adaptation
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Solution Overview
Problem
Wearable cardioverter defibrillators (WCDs) face challenges in user interaction due to non-responsive graphical user interfaces (GUIs that do not adapt to changes in orientation, leading to difficulties in proper operation and potential delays in emergency situations.
Innovation Solution
A WCD system with a processor and motion sensors that detect patient-activated movements, orient the display correctly, and provide visual status indicators, ensuring the GUI remains upright and usable regardless of device orientation, enhancing interaction and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the WCD uses a fixed orientation display, then the device structure is simple, but the user interface becomes unreadable when the device orientation changes
Solution Approach 1:
The display orientation is made dynamic by detecting device motion through sensors (accelerometer, gyroscope) and automatically rotating the display content to maintain an upright orientation relative to the user. This resolves the contradiction by making the display adaptable to different device orientations while keeping the overall device structure relatively simple.
Solution Approach 2:
The display rotation angle is changed as a parameter in response to detected device orientation changes. The system monitors orientation parameters and adjusts the display rotation accordingly, allowing the interface to remain readable regardless of how the device is held or worn.
2Device complexity
If the WCD GUI does not respond to orientation changes, then the system is simple, but user interaction becomes difficult in emergency situations
Solution Approach 1:
The system performs preliminary actions by detecting device motion and orientation changes before the user needs to interact with the interface. By proactively rotating the display to the correct orientation, the system ensures the interface is immediately readable when the user needs it during emergency situations, reducing response time.
Solution Approach 2:
The system implements feedback by continuously monitoring device orientation through sensors and automatically adjusting the display orientation in response. This closed-loop feedback mechanism ensures the interface remains usable without requiring complex manual adjustments from the user during critical moments.
3Ease of operation
If the WCD display rotates automatically with device orientation, then user interaction is improved, but the device requires motion sensors and processing capability
Solution Approach 1:
The motion sensors (accelerometer, gyroscope) are designed to serve multiple functions: detecting device orientation for display rotation, identifying user presence, and triggering emergency alerts. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in overall device complexity while achieving improved user interface usability.
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
Improves user interaction by ensuring the GUI remains readable and functional across various orientations, reducing the risk of unnecessary shocks and facilitating timely intervention during emergencies.
Implementation Method 1
A motion sensor is coupled to the user interface, the motion sensor positioned to detect a motion at the user interface
Data Source
AI summary
In one embodiment, a wearable cardioverter defibrillator (WCD) is described. The WCD includes a support structure worn by a patient. A processor is coupled to the support structure. The WCD also includes a discharge circuit coupled to an energy storage module, the discharge circuit configured to discharge the stored electrical charge through a body of the patient. The wearable cardioverter defibrillator also includes a user interface housing at least one sensor and responsive to changes in device orientation. The processor is configured to detect a motion at the user interface and determine when the motion is patient-activated. When the motion is patient-activated, the processor determines a direction of rotation. The processor determines an orientation of a display at the user interface based on the direction of rotation and orients the display at the user interface to appear upright to the patient.