Shuttered Filter Synchronization for Multi-Viewer Display Isolation
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Solution Overview
Problem
Conventional displays cannot simultaneously provide different visual information and audio to multiple viewers without requiring complex and expensive setups, limiting the ability to offer unique perspectives or content to each user.
Innovation Solution
A system using a synchronized shuttered filter device on a common display alternates between two video feeds, allowing each viewer to see and hear only their intended content through LCD shutter glasses, enabling multiple users to view different images and audio streams on the same screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single display is used to provide content to multiple viewers, then device complexity and cost are reduced, but each viewer cannot see different content simultaneously without visual interference
Solution Approach 1:
The display alternates between showing different content to different viewers in rapid succession (e.g., 120Hz for first viewer, 240Hz for second viewer). The shuttered filter device synchronizes with these periodic displays, opening and closing at corresponding frequencies to allow each viewer to see only their intended content during their allocated time slots, eliminating visual interference while using a single display
Solution Approach 2:
A shuttered filter device is introduced as an intermediary between the display and each viewer. This filter synchronizes with the alternating display content, blocking light during periods when content for the other viewer is displayed and allowing light through during periods when content for the intended viewer is displayed, thereby isolating content perception without requiring separate displays
2Loss of information
If split screen or picture within picture is used to show multiple content, then multiple viewers can see different content, but the display area for each viewer is reduced
Solution Approach 1:
Instead of spatial division (split screen), the system uses temporal division by alternating the display of different content at different time intervals. Each viewer receives full-screen content during their allocated time slots, maintaining maximum display area while achieving content separation through synchronized shuttering that prevents cross-contamination of visual information
3Adaptability or versatility
If audio from multiple video feeds is provided to each viewer, then each viewer can hear all content, but audio interference and confusion occur
Solution Approach 1:
The audio output is modulated to alternate between different audio streams at the same frequency as the visual content alternation. During time slots when content for the first viewer is displayed, only audio for the first viewer is output; during time slots for the second viewer, only their audio is output. This periodic audio switching prevents audio interference and ensures each viewer hears only their intended content
Solution Approach 2:
The system uses synchronization signals from the shuttered filter device to coordinate audio output with visual display and shuttering timing. This feedback mechanism ensures that audio switching is precisely aligned with visual content switching and shutter operation, maintaining coherent audio-visual pairing for each viewer while preventing cross-talk between different content streams
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
Enables multiple users to experience unique perspectives or content on a single display without distractions, supporting applications like split-screen gaming and simultaneous viewing of different programs or videos, while maintaining full-screen dimensions and reducing visual interference.
Implementation Method 1
A first pair of LCD shutter glasses is synchronized to the display such that a first player using the first pair of LCD shutter glasses can play the video game while viewing the video game from the first perspective only
Data Source
AI summary
Respective video feeds are provided to at least two viewers using a common display. The display is controlled to alternately display an image from a first video feed and an image from a second video feed. A first shuttered filter is synchronized to the display such that the first filter is shuttered when the second video feed image is displayed, and a second shuttered filter is synchronized to the display such that the second filter is shuttered when the first video feed image is displayed. Only the first video feed image is provided to a first viewer using the first shuttered filter, and only the second video feed image is provided to a second viewer using the second shuttered filter.