Contact-Free Gesture Detection Using Antenna Load Variation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing human-computer interaction methods, particularly those relying on touch-sensitive displays, lack naturalness and are limited by the need for direct contact, which can restrict user movement and introduce issues like fingerprint marks on screens.
Innovation Solution
An electronic device equipped with a contact-free user interaction subsystem using reference and measurement oscillators to detect gestures at a distance, analyzing changes in antenna load to determine object proximity and movement, allowing for natural, gesture-based interactions without physical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If touch-sensitive display is used for user input, then interaction precision is improved, but ease of operation deteriorates due to limited user movement and fingerprint marks
Solution Approach 1:
The patent replaces the mechanical touch-based interaction system with a contact-free gesture recognition system using sensors (e.g., cameras, depth sensors, or motion detectors) to detect hand movements and gestures in three-dimensional space, eliminating the need for physical contact with the display surface
Solution Approach 2:
The patent extends interaction from two-dimensional touch gestures on the display surface to three-dimensional gesture recognition in spatial volume, allowing users to perform gestures in the air above or around the device, thereby expanding movement freedom while maintaining input precision
2Ease of operation
If contact-free gesture detection is implemented, then ease of operation is improved by expanding interaction space, but device complexity increases
Solution Approach 1:
The patent integrates multi-functional sensor arrays that serve both gesture detection and other device functions (such as ambient light sensing, proximity detection, or facial recognition), thereby reducing overall system complexity rather than adding dedicated components solely for gesture control
Solution Approach 2:
The patent employs algorithms that automatically calibrate and adapt to individual user gesture patterns without requiring manual setup or configuration, allowing the system to self-adjust to different users and environments, thereby reducing the operational complexity for end users
3Measurement precision
If touch-sensitive display is used, then interaction accuracy is improved, but object-generated harmful factors worsen due to fingerprint marks on screen
Solution Approach 1:
The patent replaces direct mechanical contact with the display surface with contact-free gesture recognition, eliminating the source of fingerprint contamination while preserving the ability to detect precise user intentions through spatial gesture analysis
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 intuitive and flexible human-computer interaction by allowing users to perform gestures at a distance, reducing the risk of fingerprint marks and expanding interaction space, while maintaining accurate gesture detection and associated actions.
Implementation Method 1
The variation in ambient capacitance alters the operating frequency of the oscillator. A digital processing unit analyzes the change in frequency, and makes detection based on certain threshold.
Implementation Method 2
a first measurement oscillator which generates a first measurement signal having a first measurement frequency corresponding to a distance of an object from a first antenna
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present disclosure provides an electronic device configured to detect an object positioned at a distance. The electronic device includes a reference oscillator generating a reference signal having a reference frequency; and a first measurement oscillator coupled to a first antenna located at a first position of the electronic device. The first measurement oscillator generates a first measurement signal having a first measurement frequency corresponding to a distance of an object from the first antenna. The first antenna has a first antenna load corresponding to the distance of the object from the first antenna, and the first measurement frequency varies in dependence on the first antenna load. The electronic device also includes a comparator coupled to the reference oscillator and the first measurement oscillator which generates a comparator output including a difference between the reference frequency and the first measurement frequency which represents the distance of the object from the first antenna.