3D Shutter Glasses Synchronization via Stereo Headphone Wires
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Solution Overview
Problem
Existing 3D glasses synchronization with 3D televisions often relies on wireless signals, which can be inconvenient and may disrupt the audio experience, especially when used with non-3D enabled devices that lack specialized transmitters.
Innovation Solution
A method and device configuration that uses stereo headphone wires to transmit a synchronization signal embedded within audio data to 3D glasses, allowing them to synchronize with a display's frame rate and provide stereoscopic content without the need for wireless transmitters, using techniques like phase shifting or keying to ensure seamless audio delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless synchronization signals are used for 3D glasses, then synchronization with 3D televisions is achieved, but audio experience is disrupted and additional components are required
Solution Approach 1:
The audio cable is made to serve dual functions: transmitting both audio signals and synchronization signals for the 3D glasses. The synchronization signal is embedded within the audio data stream, allowing the same physical medium (headphone wire) to carry both types of information without requiring separate wireless transmitters or dedicated synchronization cables.
Solution Approach 2:
The patent combines the synchronization signal transmission with the existing audio signal transmission through the headphone cable. By embedding the synchronization signal within the audio data and using the same conductors for both purposes, the system merges two functions into a single communication channel, eliminating the need for separate wireless components.
2Adaptability or versatility
If specialized wireless transmitters are built into 3D televisions, then synchronization signal transmission is enabled, but device complexity and cost increase
Solution Approach 1:
The audio output interface of the display device is made multi-functional by enabling it to transmit both audio and synchronization signals through the same connection. This allows any device with a standard audio output to serve as a 3D content source without requiring specialized wireless transmitter hardware.
Solution Approach 2:
The existing audio cable infrastructure is made to serve the additional function of synchronization signal transmission. Rather than adding new dedicated components, the system utilizes the already-present audio connection to carry both audio and synchronization data, making the system self-sufficient.
3Ease of operation
If synchronization signals are transmitted wirelessly, then 3D glasses can be synchronized without cables, but signal interference and audio disruption occur
Solution Approach 1:
The audio cable acts as an intermediary medium that physically connects the display device to the 3D glasses, providing a stable and interference-resistant transmission path. By using this wired connection instead of wireless transmission, the system eliminates radio frequency interference while maintaining ease of setup through the use of standard audio cables.
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 efficient synchronization of 3D glasses with 2D devices, providing a stereoscopic image without disrupting the audio experience and reducing the need for additional components, making it suitable for various consumer electronics with high refresh rates.
Implementation Method 1
software in the portable device may phase shift the left and right audio channels slightly to embed the synchronization channel
Implementation Method 2
Other modulation/demodulation techniques, such as amplitude-shift keying, frequency-shift keying and phase-shift keying may be used to embed the synchronization signal
Implementation Method 3
The glasses typically comprise a specialized receiver to receive and analyze the wirelessly transmitted synchronization signal... A viewer typically wears glasses that have liquid crystal (LC) active shutters rapidly blocking the left and right eye views alternatively
Data Source
AI summary
3D shutter glasses with a synchronization signal sent through a stereo headphone wire are presented. In some embodiments, the 3D shutter glasses receive a synchronization signal through the same wire that transmits audio data to headphones or other audio devices. The synchronization signal may be combined with the audio data through various techniques so as to not disrupt the audio a listener hears, but to still provide the data to the 3D shutter glasses to synchronize with a display.