Handheld Projector Motion Stabilization via Sensor Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Handheld projectors face challenges in developing interaction techniques that accommodate movement, as projected imagery moves and distorts with user hand movements, leading to instability and poor user experience.
Innovation Solution
A method that uses a handheld projector to project animated objects responsive to the projector's position and orientation, allowing users to control these objects through movements and gestures, integrating the projector as a gestural input device to create a unified interaction style and blend virtual content with the physical environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional projection methods are used, then the projector can display images, but the projected imagery moves and distorts with user hand movements
Solution Approach 1:
The system uses motion sensors (accelerometers, gyroscopes) to detect projector movement and provides feedback by dynamically adjusting the projected image parameters. The processor receives motion data and modifies display frame properties to compensate for detected movements, creating a closed-loop control system that stabilizes the projection.
Solution Approach 2:
The system changes display parameters (image position, orientation, distortion correction) based on detected projector motion. By dynamically adjusting these parameters in response to sensor data, the system maintains image stability despite physical movement of the handheld device.
2Stability of the object's composition
If the projector remains stationary, then the projected image is stable, but the user cannot move or gesture to interact with the projection
Solution Approach 1:
The system transitions from a static projection model to a dynamic one where the projected image adapts in real-time to user gestures. Motion sensors detect hand movements and the system dynamically adjusts image properties, enabling interactive control while maintaining stability through continuous adaptation.
Solution Approach 2:
Motion sensors continuously monitor projector and user hand movements, providing feedback to the processing system. This feedback loop enables the system to distinguish between stabilizing adjustments and intentional gesture commands, allowing both image stability and gesture interaction to coexist.
3Speed
If the projected image follows projector movement, then the image remains visible on the intended surface, but the image distorts and loses quality
Solution Approach 1:
The system selectively adjusts image parameters based on the type and magnitude of detected motion. For small compensatory movements, the system applies subtle parameter changes to maintain stability, while for larger intentional movements, it applies more significant adjustments to track the new projection surface position, optimizing both tracking and precision.
Data Source
AI summary
An image projection system may be configured to project objects which respond to movements and gestures made using a handheld projector, as well as to methods for controlling the projected objects based on such user input. For example, users may interact with and control objects in a projection frame by moving and/or gesturing with the handheld projector. Further, objects or characters projected using the handheld projector may be configured to perceive and react to physical objects in the environment. Similarly, elements of the physical environment may be configured to respond to the presence of the projected objects or characters in a variety of ways.