Tunable VCSEL Gesture Sensing With Lower Processor Load
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Solution Overview
Problem
There is a need for improved systems and methods for gesture recognition that can efficiently detect user movements and provide accurate input to electronic devices without being processor intensive.
Innovation Solution
A monitoring device system that includes a tunable VCSEL laser with active regions having quantum wells and barriers, surrounded by p-n junctions, and featuring buried tunnel junctions for optical and electrical confinement. This system detects user movement information and can determine gestures, sleep information, and respiration information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If camera-based gesture detection is used, then gesture recognition capability is improved, but processor intensity increases
Solution Approach 1:
The patent replaces camera-based optical detection with VCSEL-based light detection and ranging (LiDAR) technology. This substitution uses structured light projection and time-of-flight measurement to detect hand gestures, replacing the need for complex image processing algorithms while maintaining accurate gesture recognition capability.
Solution Approach 2:
The system uses multiple VCSELs operating at different wavelengths to project structured light patterns. By changing the wavelength parameter and measuring the time of flight for each wavelength, the system can distinguish between different objects and accurately detect gestures with reduced computational requirements compared to camera-based approaches.
2Measurement precision
If multiple VCSELs with different wavelengths are used, then gesture detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent employs multiple VCSELs that can operate at different wavelengths, where each VCSEL serves multiple functions: wavelength-specific light projection, time-of-flight measurement, and object differentiation. This multi-functional design enables accurate gesture detection without proportionally increasing overall system complexity.
Solution Approach 2:
The system dynamically switches between different VCSEL wavelengths based on detection needs. By activating only the necessary VCSELs for specific gesture types or environmental conditions, the system maintains high detection accuracy while managing device complexity through adaptive operation rather than continuous full-system 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
The system effectively detects user gestures and other movement-related information with high accuracy, reducing processor intensity and enhancing the natural interaction between humans and electronic devices.
Implementation Method 1
A tunable VCSEL laser with one or more active regions having quantum wells and barriers
Implementation Method 2
active regions having quantum wells and barriers
Implementation Method 3
The VCSEL includes an HCG grating and a bottom DBR
Implementation Method 4
The active regions are surrounded by one or more p-n junctions. The one or more active regions include a selected shape structure each with a tunnel junction (TJ)
Implementation Method 5
A motion detection apparatus detects a user's movement information
Data Source
AI summary
A monitoring device system includes a tunable VCSEL laser 10 with one or more active regions having quantum wells and barriers. The active regions are surrounded by one or more p-n junctions. The one or more active regions can include a selected shape structure each with a tunnel junction (TJ). One or more apertures are provided with the selected shape structure. One or more buried tunnel junctions (BTJ) or oxide confine the apertures, additional TJ's, planar structures and or additional BTJ's created during a regrowth process that is independent of a first growth process. A VCSEL output is determined in response to a monitoring application of the VCSEL The VCSEL includes an HCG grating and a bottom DBR. A user monitoring device includes the VCSEL laser. A motion detection apparatus detects a user's movement information. The motion detection apparatus and the monitoring system assist to determine one or more of a person's: gestures; sleep information and sleep behavior information, or user respiration information. A cloud based system is in communication with the monitoring device and the motion detection apparatus.