Contactless Gesture Detection Using Tri-Directional Light Wave Signals
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Solution Overview
Problem
Existing remote control technologies require physical contact, which can be inconvenient, especially in public settings or when hands are dirty, and there is a need for contactless operation methods for electronic devices.
Innovation Solution
An object detection method using three light sources and a receiver to transmit and receive light wave signals, determining object displacements and locations to detect user gestures, allowing for contactless operation of electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If physical contact control (remote controller buttons) is used, then device control function is achieved, but user convenience deteriorates when hands are dirty or in public settings
Solution Approach 1:
The patent replaces the mechanical contact-based remote control system with an optical detection system. The object detector uses light sources to emit light waves and receivers to detect reflected light, converting mechanical button pressing into optical gesture detection. This substitution enables contactless operation while maintaining device control functionality, directly resolving the contradiction between contactless convenience and operational versatility.
Solution Approach 2:
The patent introduces light waves as an intermediary between the user and the electronic device. Instead of direct mechanical contact, the user's gestures modify light wave reflections, which are then detected and translated into control commands. This intermediary mechanism enables indirect contactless control, improving ease of operation while preserving adaptability across different usage scenarios.
2Measurement precision
If multiple light sources and receivers are used to detect gestures accurately, then gesture detection precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the gesture detection function into multiple independent light sources and receivers. Each light source-receiver pair detects specific aspects of the gesture, and their combined information provides comprehensive gesture recognition. This segmentation enables accurate 3D gesture detection while allowing modular design, which manages complexity through functional decomposition rather than monolithic design.
Solution Approach 2:
The patent transitions from 2D gesture detection to 3D gesture detection by adding multiple light sources positioned at different spatial locations. This dimensional expansion enables accurate depth perception and spatial gesture recognition. The additional dimension improves measurement precision by providing stereoscopic information, while the systematic arrangement of components manages the inherent complexity increase.
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 contactless operation of electronic devices by accurately detecting user gestures, facilitating convenient control of devices like televisions without the need for physical contact with remote controllers.
Implementation Method 1
receiving, in turn, the first light wave signal, the second light wave signal and the third light wave signal reflected by an object
Data Source
AI summary
An object detection method includes, in turn, enabling a first light source, a second light source and a third light source to transmit a first light wave signal, a second light wave signal and a third light wave signal; in turn, receiving the first light wave signal, the second light wave signal and the third light wave signal reflected by an object to determine strengths of the first light wave signal, the second light wave signal and the third light wave signal, respectively; and determining a first displacement of the object along a first direction according to strength variances of the first light wave signal and the second light wave signal, and determining a second displacement of the object along a second direction according to strength variances of the first light wave signal and the third light wave signal, wherein the first direction is substantially perpendicular to the second direction.