Card Smart Key Touch Sensor Button Verification
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Solution Overview
Problem
Conventional card-type smart keys lack a mechanism to prevent incorrect operation due to button manipulation errors and consume battery life unnecessarily due to continuous sensor operation.
Innovation Solution
Incorporating a capacitive touch sensor around each button to accurately detect user input and reduce battery consumption by entering a power-saving state when no buttons are pressed, while maintaining the key's slim design and enabling remote keyless entry functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If buttons are added to enable remote keyless entry function, then functionality is improved, but incorrect operation due to incorrect button manipulation occurs
Solution Approach 1:
A touch sensor is introduced as an intermediary between the button and the control system. The touch sensor detects touch input around the button area, providing an additional verification layer that confirms intentional user input before executing remote keyless entry functions, thereby preventing incorrect operations while maintaining functionality
Solution Approach 2:
The system implements feedback by monitoring both button press states and surrounding touch sensor states. This dual-feedback mechanism allows the system to distinguish between intentional button presses and accidental manipulations, improving reliability by confirming user intent before executing functions
2Measurement precision
If touch sensor is continuously operated to detect button input, then input detection accuracy is improved, but battery consumption increases
Solution Approach 1:
The touch sensor operates periodically rather than continuously. The controller activates the touch sensor only when a button press is detected or at scheduled intervals, maintaining detection accuracy when needed while minimizing power consumption during idle periods through periodic operation
3Ease of operation
If card-type smart key is made thin and flat for portability, then ease of carrying is improved, but space for additional components is reduced
Solution Approach 1:
The touch sensor is merged with the button structure, with the touch sensor positioned around the button perimeter. This integration allows both button press detection and touch detection to occur within the same component footprint, adding functionality without increasing the overall size of the smart key
Solution Approach 2:
The touch sensor is implemented as a thin film structure that can be integrated into the card-type housing without significantly increasing thickness. This flexible implementation allows the addition of touch detection capability while maintaining the thin and flat form factor required for portability
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
Prevents incorrect operations by ensuring precise button input recognition and extends battery life by minimizing unnecessary sensor activity, enhancing both functionality and portability of the smart key.
Implementation Method 1
at least one touch sensor disposed around the at least one button
Data Source
AI summary
A card-type smart key includes at least one button, at least one touch sensor disposed around the at least one button, and a controller for receiving at least one input from the at least one button and the at least one touch sensor, wherein, upon sensing manipulation of any one of the at least one button and then sensing touch from a touch sensor disposed around the manipulation-sensed button, the controller performs a function corresponding to the manipulation.