Wireless 3D Eyewear Shutter Synchronization via Latency Compensation
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Solution Overview
Problem
Existing three-dimensional viewing systems face synchronization challenges with industry standard players and televisions due to high latency in wireless transmission techniques, leading to blurring and artifacts from incorrect shutter timing.
Innovation Solution
The system employs industry standard wireless transmission techniques like WiFi or Bluetooth to synchronize eyewear shutters by measuring and compensating for latency, using a phased-locked loop and user-adjustable skew control to ensure precise timing alignment with the television's frame display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless transmission techniques (WiFi, Bluetooth) are used to synchronize eyewear shutters with television frames, then ease of operation and device complexity are improved, but transmission latency increases causing shutter timing errors
Solution Approach 1:
The system transmits synchronization packets at predetermined intervals before the actual frame display occurs. By sending the synchronization signal in advance, the eyewear shutters can be activated at the correct time despite the wireless transmission delay, ensuring proper timing alignment between shutter activation and frame display.
Solution Approach 2:
The system measures the actual transmission latency of synchronization packets and uses this feedback information to adjust the timing of subsequent packet transmissions. By continuously monitoring and compensating for latency variations, the system maintains accurate synchronization between the eyewear shutters and television frames even under varying transmission conditions.
2Device complexity
If wireless transmission is used to reduce device complexity, then connection requirements are simplified, but synchronization precision deteriorates due to latency variability
Solution Approach 1:
Synchronization packets are transmitted at predetermined intervals before the frames they synchronize with are displayed on the television. This advance transmission allows the eyewear system to account for and compensate for wireless latency, maintaining precise shutter timing without requiring complex wired connections.
Solution Approach 2:
The system continuously measures transmission latency and uses this feedback to dynamically adjust synchronization timing. This closed-loop approach maintains high synchronization precision despite the inherent variability of wireless transmission, eliminating the need for complex connection management.
3Measurement precision
If latency compensation is implemented to improve synchronization accuracy, then shutter timing precision is improved, but system complexity increases due to additional control mechanisms
Solution Approach 1:
The system transmits synchronization packets at predetermined intervals before frame display, embedding timing information that accounts for expected latency. This approach achieves accurate shutter timing through relatively simple timing adjustments rather than complex real-time control mechanisms.
Solution Approach 2:
The system adjusts the timing parameters of synchronization packet transmission based on measured latency characteristics. By changing when packets are sent rather than how they are processed, the system achieves precise shutter control with minimal additional complexity.
Data Source
AI summary
An application for transmission of a three-dimensional eyewear synchronization signal to synchronize the operation of shutters of three-dimensional eyewear uses an industry standard wireless transmission technique. To compensate for inherent latencies of such transmission techniques, the latencies are measured and monitored to determine expected latencies and the shutter synchronization signal is skewed by the latency. In some embodiments, the synchronization signal is further adjusted by a user skew control.