Multi-User Perspective Projection Using Shutter Glasses and LED Sub-Frames
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Solution Overview
Problem
Location-based entertainment experiences struggle with creating immersive and personalized views for multiple participants due to fixed perspectives and parallax shifts, with VR technology failing to maintain a shared experience.
Innovation Solution
A system using active shutter glasses synchronized with a high-refresh rate LED screen, combined with a motion capture system and render nodes, tracks individual participant positions to render personalized views in real-time, ensuring each participant sees their correct perspective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed-perspective projection is used in LBE experiences, then device complexity is reduced and ease of operation is improved, but immersion quality deteriorates due to parallax shifts when viewers move around the space
Solution Approach 1:
The system dynamically adjusts the projection perspective based on the tracked positions of multiple participants. The perspective shifts in real-time as participants move, maintaining correct geometric relationships and preventing parallax errors while keeping the system adaptable to different viewing configurations
Solution Approach 2:
The system uses motion capture tracking to continuously monitor participant positions and feeds this information back to the rendering system. This feedback loop enables real-time adjustment of the projected perspective to match actual viewer locations, maintaining immersion quality
2Device complexity
If multiple participants are tracked and a fixed view is displayed to all, then device complexity is reduced, but immersion quality deteriorates because the view cannot be personalized for each participant
Solution Approach 1:
The system segments the visual content into multiple perspective streams, one for each tracked participant. Each participant receives a personalized perspective calculation based on their individual position, while the underlying tracking and rendering infrastructure remains shared and coordinated
Solution Approach 2:
The system calculates and renders perspectives for all tracked participants even though only one participant views each perspective at a time. This excessive calculation ensures that when participants switch positions or viewpoints, their personalized perspective is already prepared and immediately available
3Reliability
If VR technology is used to provide complete immersion, then immersion quality is improved, but the shared experience quality deteriorates because VR requires a solitary experience
Solution Approach 1:
The system merges the immersive quality of VR with the shared social experience of LBE by projecting personalized perspectives onto a shared large-scale display. Each participant experiences a view tailored to their position while remaining physically present with other participants, combining individual immersion with group interaction
4Adaptability or versatility
If large-scale LED screens are used to provide wide viewing angles, then adaptability is improved, but immersion quality deteriorates due to poor viewing angles causing participants outside the optimal zone to miss out on the experience
Solution Approach 1:
The projection perspective dynamically adapts to each participant's location across the wide viewing area. Instead of relying on a fixed optimal viewing zone, the system calculates and projects personalized perspectives that remain accurate regardless of where participants are positioned within the large LED screen's viewing area
Data Source
AI summary
Tracking and displaying personalized views of participants including: a plurality of pairs of active shutter glasses to be worn by the participants and is synchronized to an LED screen, wherein a shutter for each eye of each pair of the active shutter glasses is configured to allow light to transmit to each eye only during a correct sub-frame and block the light during all other sub-frames; a motion capture system to detect positions of the participants by tracking the plurality of pairs of active shutter glasses to generate tracking data; a plurality of render nodes coupled to the LED screen; a central controller to receive the tracking data to trigger discrete render processes of the plurality of render nodes for unique perspective of each participant, wherein the triggered discrete render processes render and transmit video in parallel to display video streams as sub-frames on the LED screen.