LAN Cable Connection for Stereoscopic Display Synchronization
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Solution Overview
Problem
The existing projection-type display systems face challenges in connecting the projector apparatus to the opening and closing control device due to the limited length of USB cables and the inflexibility and cost of dedicated fixed-length cables, making it difficult to transmit synchronization signals over long distances, especially in large facilities like movie theaters.
Innovation Solution
The use of a LAN cable to connect the projection-type display apparatus and the opening and closing control device, allowing for longer distance transmission without length limitations and eliminating hard-wiring constraints, thereby improving the feasibility of installation and flexibility in projector system setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a USB cable is used to connect the projector apparatus to the emitting device, then the synchronization signal can be transmitted, but the cable length is limited to 5 meters which is insufficient for large facilities
Solution Approach 1:
The patent changes the connection interface from USB to LAN, fundamentally altering the transmission medium parameters. LAN cables support much longer distances (up to 100 meters or more) compared to USB cables (5 meters), thereby resolving the length limitation while maintaining reliable signal transmission through standardized network infrastructure.
2Adaptability or versatility
If a dedicated fixed-length cable is used, then the cable can be customized for specific distances, but the cost increases and flexibility is reduced
Solution Approach 1:
The patent adopts LAN cables which serve multiple functions: they provide standardized long-distance connection capability, support various lengths through standard infrastructure, and can be used across different installation scenarios. This universal approach eliminates the need for custom-made dedicated cables, reducing costs while maintaining installation flexibility through standard network practices.
3Area of stationary object
If the projector apparatus is suspended from the ceiling in large facilities, then the imaging coverage is improved, but the distance between the projector and emitting device increases making cable connection difficult
Solution Approach 1:
The patent changes the transmission protocol and physical layer parameters by switching from USB to LAN connectivity. This enables the system to accommodate the increased distances resulting from ceiling suspension installations in large facilities, supporting cable lengths up to 100 meters or more while maintaining synchronized operation between the projector and emitting device.
Data Source
AI summary
A projection-type display system includes: a projection-type display apparatus that alternately switches images for the left eye and images for the right eye and projects the images onto an object; and an opening and closing control device that receives a control signal based on the display states of the images projected onto the object by the projection-type display apparatus and controls switching apertures of stereoscopic image viewing glasses corresponding to left and right eyes, wherein the projection-type display apparatus is connected to one end of a LAN cable and the opening and closing control device is connected to the other end of the LAN cable.