HDMI Cable with Optical Fiber for Long-Distance Signal Transmission
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Solution Overview
Problem
Conventional HDMI signal transmission cables face challenges in long-distance transmission due to signal attenuation and crosstalk, leading to poor compatibility and increased manufacturing costs as the demand for higher signal rates and data increases.
Innovation Solution
A signal transmission cable with HDMI connectors utilizing photo-electric conversion technology to convert audio and E-DDC control signals into optical signals for transmission through optical fibers, enabling bi-directional conversion between electric and optical signals using electro-optic and photo-electric conversion modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional copper cables are used for HDMI signal transmission, then electrical connection is simple, but signal attenuation and crosstalk increase with transmission distance
Solution Approach 1:
The patent replaces the conventional electrical signal transmission system with an optical signal transmission system. Specifically, it substitutes copper conductors with optical fibers, and replaces electrical signals with optical signals for HDMI audio/video and E-DDC control signals. This substitution eliminates signal attenuation and crosstalk issues inherent in electrical transmission, enabling reliable long-distance transmission while maintaining connection simplicity through integrated electro-optic conversion modules at the connector ends.
2Length of stationary object
If cable length is increased to meet long-distance transmission requirements, then transmission distance is improved, but signal attenuation and manufacturing cost increase
Solution Approach 1:
The patent replaces electrical transmission with optical transmission to enable long-distance signaling without the exponential cost increase typical of electrical cables. Optical fibers have inherently lower attenuation, allowing longer runs without signal boosters or repeaters, thus avoiding the need for complex multi-section cable assemblies that would increase manufacturing complexity and cost.
Solution Approach 2:
The patent integrates multiple functions into the HDMI connector structure: the connector simultaneously provides mechanical connection, electro-optic conversion, and optical signal transmission. By incorporating electro-optic conversion modules directly into the connector housing, the design eliminates the need for separate conversion devices, reducing overall system complexity and manufacturing cost while enabling long-distance transmission.
3Speed
If higher signal transmission rates are implemented to meet HDMI 2.0/2.1 requirements, then bandwidth is improved, but signal attenuation and crosstalk worsen
Solution Approach 1:
The patent replaces electrical signal transmission with optical signal transmission to achieve high-speed HDMI 2.0/2.1 signal rates while maintaining signal integrity. Optical fibers exhibit negligible crosstalk and minimal attenuation even at high frequencies, enabling reliable transmission of high-bandwidth signals including 18 Gbps 4K@50Hz/60Hz and synchronous transmission of video at resolutions of 4096×2160p, 7680×4320, or 10K at 60 frames per second.
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
This solution effectively addresses signal attenuation and crosstalk issues, enabling reliable high-definition audio/video transmission over long distances while reducing manufacturing costs by using optical fibers for improved signal integrity and compatibility.
Implementation Method 1
a first electro-optic conversion module, a second electro-optic conversion module and a first optical transmission fiber module which all are in cooperation with each other to convert the electric signal into optical signal
Implementation Method 2
a second HDMI connector is electrically connected to other end of the cable opposite to the first HDMI connector, the second HDMI connector comprises a second optical transmission fiber module, a first photo-electric conversion module and a second photo-electric conversion module which are in cooperation with each other to receive the optical signal transmitted from the cable and convert the optical signal into the electric signal
Implementation Method 3
transmit the optical signal through an optical fiber
Data Source
AI summary
The present invention relates to a signal transmission cable with HDMI connectors, and the signal transmission cable uses an optical fiber inside the cable to transmit optical signal. A first HDMI connector comprises a transmission terminal group for transmitting electric signal, and first and second electro-optic conversion modules and a first optical transmission fiber module which all are configured to transmit electric signal, convert electric signal into optical signal, and transmit optical signal to the cable. A second HDMI connector is connected to other end of the cable and comprises a second optical transmission fiber module, first and second photo-electric conversion modules which all are configured to receive the optical signal from the cable, and convert optical signal into electric signal, and a signal terminal group transmitting electric signal. Therefore, the signal transmission cable can provide function of converting and transmitting optical signal and electric signal in bi-direction.