Optical Transceiver for HDMI Signal Transmission
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Solution Overview
Problem
Current digital video and audio cables, such as DVI and HDMI, are limited by bandwidth and length, and lack bidirectional communication capabilities, restricting the compatibility and configuration of digital consumer electronics.
Innovation Solution
The implementation of optical interfaces and transceivers in digital source and sink devices, using optical fibers to transmit TMDS signals, enabling longer cable lengths and bidirectional communication through a combination of optical and electrical links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If copper-based DVI or HDMI cables are used for digital video and audio transmission, then the interface is simple and widely compatible, but the cable length is limited and electromagnetic interference occurs
Solution Approach 1:
The patent replaces copper-based electrical transmission with optical fiber transmission. The optical transceiver converts electrical TMDS signals to optical signals for transmission through optical fiber, eliminating electromagnetic interference inherent in copper cables while enabling longer transmission distances without signal degradation.
Solution Approach 2:
The patent introduces an optical transceiver as an intermediary device between the digital source/sink and the transmission medium. This transceiver converts electrical signals to optical signals, allowing the use of optical fiber as an intermediary transmission medium that is immune to electromagnetic interference and supports longer cable lengths.
2Object-affected harmful factors
If optical interfaces are implemented to increase cable length and reduce interference, then electromagnetic interference is reduced and cable length increases, but the device complexity increases
Solution Approach 1:
The patent merges the transmitter and receiver functions into a single optical transceiver module. This integration reduces the overall system complexity by combining multiple components (laser diode, photodetector, signal processing circuits) into one unified device that can be easily interfaced with existing TMDS-compatible equipment.
3Length of moving object
If optical fiber transmission is used to extend cable length, then transmission distance increases, but bidirectional communication capability is lost
Solution Approach 1:
The patent segments the communication function into separate transmit and receive paths. Each device in the system has both a transmitter (for sending optical signals) and a receiver (for receiving optical signals), enabling full-duplex bidirectional communication over the optical fiber link while maintaining extended cable length capabilities.
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 enhances data transfer rates and distances, improves compatibility between digital devices, and reduces electromagnetic interference, allowing for higher resolution and quality digital video and audio transmission.
Implementation Method 1
an optical transmitter for receiving the electronic TMDS signals, converting the electric TMDS signals to at least one optical signal, and for transmitting the at least one optical signal to the optical fiber
Implementation Method 2
an optical receiver for receiving an optical signal from the first end of the optical fiber and for converting the optical signal into at least one TMDS signal
Data Source
AI summary
Digital electronic devices for optical communication of digital video and/or audio signals between a digital source device and a digital sink device. A digital source device includes a transition minimized differential signaling (TMDS) transmitter for receiving control and digital video signals from a source controller and for converting the control and digital video signals into electric TMDS signals. An interface receives a first end of an optical fiber. An optical transmitter converts the electric TMDS signals to at least one optical signal and transmits the at least one optical signal to the first end of the optical fiber. A digital sink device receives the at least one optical signal from a second end of the optical fiber and converts the optical signal into TMDS signals. A TMDS receiver converts the TMDS signals into control and digital video signals and transmits the control and digital video signals to the sink controller.