Electronic Case Capacitive Input to Prevent False Button Triggers
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Solution Overview
Problem
Conventional input mechanisms in electronic device cases often suffer from air gaps that affect button tactility and can unintentionally trigger sensitive buttons due to pre-loaded forces, leading to poor user experience.
Innovation Solution
The use of capacitive touch sensors in the case that provide input capabilities independently of the device buttons, eliminating air gaps and enabling alternative input mechanisms such as touch and sliding gestures, with the device disabling actual buttons when the case is detected to prevent false triggers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional mechanical buttons with pre-loaded forces are used in the case, then button responsiveness is improved, but false triggers occur due to unintentional activation
Solution Approach 1:
The patent replaces the mechanical button system with a capacitive touch sensor system. Instead of using mechanical components with pre-loaded forces that physically press buttons, the invention uses capacitive sensing to detect touch inputs through the case material. This substitution eliminates the mechanical contact and pre-loaded force issues that caused false triggers, while maintaining button responsiveness through electrical field detection.
Solution Approach 2:
The case itself serves as an intermediary medium between the user's finger and the electronic device buttons. The capacitive touch sensor in the case detects changes in electrical capacitance when a user touches the case surface, translating this into input signals without requiring direct mechanical contact with the device buttons. This intermediary approach prevents false triggers while preserving tactile feedback.
2Adaptability or versatility
If capacitive touch sensors are used in the case, then input versatility is improved through touch and sliding gestures, but device complexity increases
Solution Approach 1:
The capacitive touch sensor system provides multiple input capabilities through a single sensor array. The same sensor can detect various gesture types including taps, slides, and pressure variations, allowing one component to serve multiple input functions. This multi-functionality increases input versatility without requiring separate specialized sensors for each gesture type.
Solution Approach 2:
The system differentiates between various input gestures by analyzing changes in capacitive parameters such as capacitance magnitude, duration, and rate of change. By monitoring these parameter variations, the sensor can distinguish between different user intentions (e.g., a quick tap versus a deliberate slide gesture) without requiring complex mechanical structures, thus managing device complexity while enhancing input versatility.
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
Enhances user experience by improving button tactility and allowing for diverse input methods, reducing false activations and enhancing functionality through capacitive sensing.
Implementation Method 1
The touch sensor may include a button cap, a substrate, and a capacitive touch sensor between the button cap and the substrate.
Data Source
AI summary
Input mechanisms can employ a case for an electronic device that provides input capabilities to enhance the user experience when using the case in concert with the electronic device. For example, a case can provide an electromechanical touch sensor to provide the user with an input mechanism that does not require actuation of the button of the electronic device. The electronic device, upon detecting the presence of the case, can disable one or more buttons and perform actions corresponding to the buttons when signals are received from the case.