Capacitive Remote Gesture Control for Small-Form-Factor Terminals
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Solution Overview
Problem
Data processing terminals with small form factors, such as wearable devices, face challenges in controlling various functionalities due to limited space for input commands and difficulty in switching between applications, with voice commands being impractical in noisy environments.
Innovation Solution
Implementing capacitive sensing to detect user gestures remotely and associate different applications with non-overlapping distance ranges, allowing users to control multiple functions intuitively based on gesture type and proximity to the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the device uses a small form-factor, then the device portability and wearability are improved, but the number of physical control buttons and input methods are limited
Solution Approach 1:
The patent transitions from two-dimensional surface controls (buttons on device surface) to three-dimensional spatial gestures (hand movements in air around device). By detecting gestures at different distances and positions in 3D space, the system provides multiple control dimensions without adding physical buttons, resolving the contradiction between small device size and control functionality.
Solution Approach 2:
The patent introduces capacitive sensing as an intermediary mechanism between the user and the device. Instead of direct physical contact with buttons, users perform gestures in the air, and the capacitive sensor array detects these gestures remotely. This intermediary enables contactless control with multiple input modes while maintaining a compact device form-factor.
2Device complexity
If the device has limited physical control buttons, then the device simplicity and compactness are maintained, but the ability to switch between applications manually becomes cumbersome
Solution Approach 1:
The patent implements preliminary action by pre-defining distance ranges that are automatically associated with different applications. When a user performs a gesture at a specific distance, the system already has the corresponding application ready and activated, eliminating the need for manual switching. The gesture itself triggers both the application activation and the function execution in one action.
Solution Approach 2:
The patent makes the gesture detection system universal by enabling a single gesture type to control different applications depending on the distance at which it is detected. The same hand gesture (e.g., a tap) can activate different applications or perform different functions based on proximity to the device, providing multi-functionality without additional physical controls.
3Ease of operation
If the device uses capacitive sensing for remote gesture detection, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent segments the capacitive sensing area into multiple distance ranges or zones around the device. Each zone is associated with different applications or functions. By dividing the sensing space into discrete regions, the system can interpret gestures more accurately and efficiently, managing the complexity through structured organization of the sensing data.
Solution Approach 2:
The patent uses partial action by processing only the essential features of the gesture (such as distance, direction, and basic motion pattern) rather than analyzing every detail of the hand movement. This selective processing reduces computational complexity while maintaining sufficient accuracy for reliable gesture recognition and application activation.
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 seamless interaction with multiple applications without manual switching, enhancing user experience by allowing intuitive gesture-based control and dynamic association of applications with distance ranges.
Implementation Method 1
The sensor system includes a capacitive sensor configured to sense a capacitance signal. The processor is configured to detect, based on the capacitance signal, that the user's hand is in proximity to the data processing terminal.
Data Source
AI summary
A method and system is disclosed that comprises detecting a user gesture at a location which is remote from a data processing terminal and identifying a first application based on the distance of the detected user gesture being within a first distance range from the data processing terminal, wherein a plurality of applications are associated with different distance ranges from the data processing terminal. The method and system may further cause performance of one of a plurality of functions of the first application based on the user gesture.