Millimeter-Wave Radar Gesture Detection System
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Solution Overview
Problem
Current touchscreen interfaces rely on traditional input methods and lack efficient three-dimensional gesture recognition capabilities, limiting user interaction beyond two-dimensional touch gestures.
Innovation Solution
A system utilizing millimeter-wave radars mounted on devices to detect the presence and movement of objects, such as fingers, above a touchscreen, generating gesture signatures for command execution by synchronizing multiple radars with a common reference clock, allowing for three-dimensional gesture recognition without the need for direct screen contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple millimeter-wave radars are used for three-dimensional gesture recognition, then gesture recognition capability is improved, but device complexity increases
Solution Approach 1:
The system divides the gesture detection space into multiple fields of view, with each millimeter-wave radar responsible for a specific spatial sector. This segmentation allows comprehensive three-dimensional coverage while maintaining manageable complexity for each individual sensor node.
Solution Approach 2:
Multiple millimeter-wave radars are combined into a unified gesture recognition system, where their individual detection capabilities are merged to achieve comprehensive spatial awareness. The controller integrates signals from all radars to generate complete gesture signatures.
2Measurement precision
If millimeter-wave radars are synchronized with a common reference clock, then measurement precision is improved, but device complexity increases
Solution Approach 1:
A common reference clock is implemented as a universal synchronization mechanism that serves all millimeter-wave radars simultaneously. This single clock source provides time coordination across the entire radar array, enabling precise temporal correlation of gestures detected by different sensors without requiring individual clock synchronization systems.
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 interact with devices using complex gestures for functions like app launching, volume control, and authentication without touching the screen, enhancing user experience through advanced gesture recognition and command execution.
Implementation Method 1
A system utilizing millimeter-wave radars mounted on devices to detect the presence and movement of objects
Data Source
Figure 1~2
Figure 3A~3C
Figure 3D~4A
AI summary
A controller is configured to be coupled to a plurality of millimeter-wave radars mounted on a device having a screen. The controller is configured to: at a first time, detect a first presence of an object in a field of view of a first millimeter-wave radar of the plurality of millimeter-wave radars; at a second time, detect a second presence of the object in a field of view of a second millimeter-wave radar of the plurality of millimeter-wave radars; determine a gesture signature based on detecting the first presence of the object in the field of view of the first millimeter-wave radar at the first time and detecting the second presence of the object in the field of view of the second millimeter-wave radar at the second time; and execute a command based on the determined gesture signature.