AED Status Display Patterns for Self-Test and Fault Discrimination
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Solution Overview
Problem
Existing automated external defibrillators (AEDs) do not distinguish between self-testing and malfunction states, making it difficult for users to differentiate between normal, abnormal, and self-testing conditions.
Innovation Solution
An AED equipped with a self-test executor and a display unit that provides distinct first, second, and third display modes to indicate normal, abnormal, and self-testing states, respectively, using different colors and patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single indicator (e.g., red LED) is used to indicate abnormal states, then the device complexity is reduced, but the ability to distinguish between self-testing and malfunction states is lost
Solution Approach 1:
The patent applies periodic action by making the indicator display different states through periodic patterns: a first pattern (e.g., green LED on) indicates normal state, a second pattern (e.g., red LED on) indicates abnormal state, and a third pattern (e.g., alternating green and red LEDs) indicates self-testing state. This allows three distinct states to be communicated using a single indicator system without adding complexity.
Solution Approach 2:
The patent changes the parameters of the indicator display system by varying the color, timing, and pattern of LED illumination. By changing these display parameters rather than adding more physical indicators, the system can distinguish between normal, abnormal, and self-testing states while maintaining simple hardware.
2Loss of information
If multiple indicators are used to distinguish all states, then state discrimination is improved, but the device complexity increases
Solution Approach 1:
The patent makes the indicator system multi-functional by enabling a single indicator to perform multiple functions: indicating normal state, abnormal state, and self-testing state. This is achieved through different display patterns and colors, allowing one component to replace what would traditionally require multiple separate indicators.
Solution Approach 2:
By using periodic display patterns (such as alternating colors or timed sequences), the single indicator can convey multiple pieces of information over time, effectively performing the function of multiple static indicators without the hardware 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
Enables users to discriminate between normal, abnormal, and self-testing states of the AED, enhancing user awareness and reducing costs through simplified display modes.
Implementation Method 1
the AED turns on a green LED (Light Emitting Diode) when there is no problem in the result of the self-test, or turns on a red LED when a malfunction or the like has been found by the self-test
Data Source
AI summary
An automated external defibrillator includes: a self-test executor that executes a self-test for checking a state of the automated external defibrillator; and a display unit that indicates the state of the automated external defibrillator. The display unit makes: a first display when the automated external defibrillator is in a normal state; a second display when the automated external defibrillator is in an abnormal state, and the first display and the second display simultaneously or in a predetermined pattern when the automated external defibrillator is self-testing.