Projection Device Motion Compensation Using Sensor Feedback
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Solution Overview
Problem
Mobile devices with projection capabilities face challenges in maintaining a stable image projection due to user movement, including unintentional shaking and intentional gestures, which affect the quality and accuracy of the projected image.
Innovation Solution
A system that uses a combination of sensors and processing modules to detect egomotion and distinguish between unintentional and intentional movements, applying correction mechanisms such as keystone correction and structured light to stabilize the projection, allowing for gesture recognition and command execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If projection capabilities are added to mobile devices, then projection functionality is provided, but image stability deteriorates due to device movement
Solution Approach 1:
The system uses sensors to detect device motion and feeds this information back to the projection system, which then adjusts the projected image in real-time to compensate for movement. This closed-loop feedback mechanism maintains image stability while preserving projection functionality.
Solution Approach 2:
Instead of using mechanical stabilization systems (such as gyroscopic stabilizers or motorized adjustment mechanisms), the patent substitutes a computational approach where software algorithms process sensor data and digitally adjust projection parameters to achieve stabilization.
2Measurement precision
If additional sensors are added to detect motion, then motion detection accuracy is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent makes existing sensors (accelerometers, gyroscopes, magnetometers) perform multiple functions: they not only provide data for projection stabilization but also enable gesture recognition and command execution. This multi-functionality eliminates the need for additional dedicated sensors.
Solution Approach 2:
The system uses the mobile device's existing sensor suite, which is already present for other functions like screen orientation and step counting. These sensors serve the projection stabilization function without requiring separate dedicated components, making the system self-sufficient.
Data Source
AI summary
Example embodiments disclosed herein relate to determining a motion based on projected image information. Image information is projected onto an external surface from a device. Sensor information about the external surface and/or projection is received. Motion of the device is determined based on the sensor information.