Wearable Display Stabilization Using Motion Compensation Offsets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wearable computing devices, such as smartwatches, face challenges in stabilizing content display while the user is in motion, leading to difficulties in reading notifications and messages due to acceleration forces that cause shakiness and oscillations, which are harder to counteract compared to hand-held devices.
Innovation Solution
A display stabilization module that uses a processor to receive and analyze motion data from sensors, applying perspective transformations and offsets to stabilize the content display by smoothing noise and adjusting the position of the content on the screen, leveraging a Kalman filter and mass-spring-damper models to compensate for acceleration and oscillatory motions, allowing for continuous stabilization and enhanced readability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If motion sensor data is used to detect prospective acceleration and apply perspective transformations, then content display stability is improved, but device complexity increases
Solution Approach 1:
The system performs preliminary smoothing of motion sensor data using a low-pass filter before processing acceleration data. This preprocessing step reduces noise and computational complexity in subsequent perspective transformation calculations, allowing stable content display while managing processing requirements
Solution Approach 2:
The patent replaces physical stabilization mechanisms (such as gyroscopes, mechanical gimbals, or additional sensors) with computational methods. By using software-based perspective transformations and coordinate system adjustments, the system achieves display stabilization without adding complex hardware components
2Measurement precision
If Kalman filter with predictive component is employed for smoothing motion sensor data, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The Kalman filter implements a feedback mechanism where the predicted state is continuously compared with actual sensor measurements. The filter uses this feedback to adjust its predictions and reduce estimation errors, improving acceleration detection precision while maintaining a manageable computational structure through recursive updates
3Stability of the object's composition
If content display is offset by fraction of difference to prior offset using hysteresis, then display stability is improved, but response time increases
Solution Approach 1:
The hysteresis mechanism provides beforehand cushioning by gradually adjusting the content display offset rather than making abrupt changes. This incremental adjustment approach prevents overshooting and oscillations, stabilizing the display while the fraction-based offset ensures the system responds within acceptable time frames by balancing stability and responsiveness
Data Source
AI summary
Stabilization of content displays in a wearable device when the wearer is in motion is disclosed. The acceleration and rotation forces acting on the wearable device are obtained. The forces acting on the body part bearing the wearable device are modeled. One or more offsets to counteract the forces are determined based on the models. The offsets are applied to the content display shown on the wearable device.