3D Display Synchronization via AC Zero-Crossing Reference Signal
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Solution Overview
Problem
Synchronizing multiple 3D display apparatuses and 3D eyeglasses is challenging, leading to distorted 3D images when the timing of image output from one apparatus is not synchronized with the shutter opening and closing times of the eyeglasses, particularly in scenarios with multiple displays.
Innovation Solution
A synchronization system that includes a power generator, detector, and controller to generate a reference signal based on zero crossing points of AC power, which is used to synchronize the image output timing of multiple 3D display apparatuses and the shutter operation timing of 3D eyeglasses, ensuring that all devices operate in sync.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple 3D display apparatuses operate independently, then each apparatus can function autonomously, but the timing of image output from different apparatuses becomes unsynchronized with the shutter opening and closing times of 3D eyeglasses, causing distorted 3D images
Solution Approach 1:
The patent introduces a reference signal as an intermediary that mediates between multiple 3D display apparatuses and 3D eyeglasses. This reference signal, generated from the AC power supply, serves as a common timing reference that all display apparatuses and eyeglasses use to synchronize their operations, thereby resolving the synchronization issue in multi-display environments
Solution Approach 2:
The reference signal generated from the AC power supply serves multiple functions simultaneously: it synchronizes image output timing across multiple 3D display apparatuses, synchronizes shutter opening and closing times of 3D eyeglasses, and provides a universal timing reference that works across different display systems, eliminating the need for separate synchronization mechanisms for each device
2Reliability
If a reference signal is generated based on AC power supply timing, then synchronization between multiple display apparatuses and eyeglasses is achieved, but the system becomes dependent on the AC power supply timing
Solution Approach 1:
The patent utilizes the inherent periodic characteristics of AC power supply (frequency and phase) as the basis for generating the reference signal. By changing the parameter selection (using zero-crossing points versus peak points) and adjusting how the reference signal is derived from AC timing, the system achieves reliable synchronization while maintaining adaptability to different operating conditions
Data Source
AI summary
Apparatus, method, and system for synchronization and a three-dimensional (3D) display apparatus using the same are provided. The 3D display apparatus includes: a power generator which generates power based on a received alternating current (AC) power signal, a detector which detects zero crossing points of time of the received AC power signal, and a controller which generates a reference signal based on the detected zero crossing points of time and transmits the reference signal to at least one other 3D display apparatus.