DP Interface Low-Speed Signal Conversion Module for Optical Fiber Transmission
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Solution Overview
Problem
In long-distance multimedia interface applications, transmitting DP signals with high-speed links like Display Port (DP) interfaces results in increased costs and power consumption due to the need for multiple optical fibers, particularly for AUX and HPD signals, which complicates meeting the time precision requirements of the Global Time Code (GTC) function.
Innovation Solution
A low-speed signal conversion module for the DP interface that combines AUX and HPD signals using a protocol parsing module, encoding module, decoding module, sending link, and receiving link, allowing for encoding and decoding of signals to reduce transmission paths and meet time precision requirements while minimizing costs and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If AUX and HPD signals are transmitted through separate dedicated optical fibers, then the time precision requirement of GTC function can be met, but costs and power consumption increase
Solution Approach 1:
The patent combines AUX and HPD signals into a single optical fiber transmission channel. The encoding module packages these signals together and transmits them through one optical fiber, reducing the number of transmission paths from two to one. This merging approach maintains signal integrity while reducing power consumption and costs associated with multiple dedicated optical fibers.
Solution Approach 2:
A single optical fiber is designed to handle multiple functions - transmitting both AUX and HPD signals simultaneously. The encoding module enables this multi-functionality by packaging different signal types into a unified transmission format, allowing one optical fiber to replace what would traditionally require two separate fibers.
2Use of energy by stationary object
If AUX and HPD signals are combined and transmitted through a pair of optical fibers using parallel-to-serial conversion, then costs and power consumption are reduced, but the time precision requirement of GTC function cannot be met due to conversion delay
Solution Approach 1:
The patent extracts and eliminates the parallel-to-serial conversion step from the signal transmission path. By directly encoding and transmitting AUX and HPD signals through the optical fiber without conversion, the source of delay is removed, thereby maintaining the time precision required for GTC function while still achieving cost and power consumption reductions.
Solution Approach 2:
The patent skips the intermediate parallel-to-serial conversion process entirely. The encoding module directly processes and transmits the signals in a format suitable for optical fiber transmission, rushing through the transmission path without unnecessary processing steps that would introduce delay and compromise time precision.
3Reliability
If multiple optical fibers are used for DP interface signals, then signal transmission quality is maintained, but transmission path complexity and costs increase
Solution Approach 1:
The patent merges multiple signal transmission paths into a single optical fiber channel. By combining AUX and HPD signals into one transmission path using the encoding module, the complexity of managing multiple separate optical fibers and their associated components is reduced, while signal transmission quality is maintained through proper encoding and decoding processes.
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
The solution enables the transmission of AUX and HPD signals with low delay, meeting the GTC function's time precision requirements, reduces transmission paths, and lowers costs and power consumption by encoding and decoding signals effectively, allowing low-speed control signals to be transmitted through a pair of optical fibers.
Implementation Method 1
the sending link further comprises an electro-optic conversion module, and the receiving link further comprises a photo-electric conversion module, wherein the electro-optic conversion module is configured to convert an electrical signal of the encoding module into an optical signal and send the optical signal, through optical fiber, to the other party communicating through the DP interface
Implementation Method 2
the photo-electric conversion module is configured to receive, through optical fiber, an optical signal transmitted by the other party communicating through the DP interface, convert the optical signal into an electrical signal, and send the electrical signal to the decoding module
Data Source
AI summary
A low-speed signal conversion module for a DP interface is provided, including a protocol parsing module, an encoding module, a decoding module, a sending link, and a receiving link. The protocol parsing module is configured to parse a DP protocol, and send a low-speed signal of the DP interface to the encoding module, or send an output signal of the decoding module to the DP interface. The encoding module is configured to perform encoding in different forms respectively according to different outputs of the protocol parsing module, and transmit the encoded signal to the sending link. In the present invention, different combinations of combined AUX, HPD and null signals are line-encoded respectively according to characteristics of a DP protocol.