Display Cable Protocol Adaptation for Bandwidth Allocation
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Solution Overview
Problem
Current display communication systems, such as those using the DISPLAYPORT standard, face limitations in bandwidth allocation, particularly when trying to support high-resolution displays and additional peripheral communication, leading to inefficiencies and potential impacts on image presentation.
Innovation Solution
A system and method that utilize a protocol selection controller to adapt the protocols on data links of a display cable, allowing for flexible communication of both display and peripheral information, with a bandwidth negotiator ensuring efficient allocation of bandwidth between display and peripheral protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DISPLAYPORT standard is used with four unidirectional data serial links, then high definition display communication is achieved, but bandwidth is insufficient when additional peripheral communication is needed
Solution Approach 1:
The patent enables each of the four unidirectional data serial links to function as either display data links or PCIe communication links based on configuration needs. This multi-functionality allows the same physical infrastructure to support both high definition display communication and peripheral device communication, resolving the bandwidth conflict by making the links universally applicable to different protocols.
Solution Approach 2:
The system dynamically allocates the four data serial links between display functions and PCIe functions based on real-time requirements. The links can be reconfigured from a static display-only mode to a dynamic mode where bandwidth is shared between display and peripheral communication, allowing the system to adapt to varying bandwidth demands without adding physical cables.
2Adaptability or versatility
If two data serial links are borrowed to create a PCIe link, then peripheral communication is enabled, but display image presentation is impacted due to restricted bandwidth
Solution Approach 1:
The patent implements dynamic bandwidth allocation where the system can adjust the number of links dedicated to display versus PCIe communication based on current workload requirements. When image presentation quality is critical, more links are allocated to display; when peripheral communication demands increase, links are dynamically reassigned, maintaining both functions at acceptable performance levels.
Solution Approach 2:
The system changes the operational parameters of the data serial links by reconfiguring them between different protocols (DISPLAYPORT vs PCIe) and adjusting bandwidth allocation ratios. This parameter flexibility allows optimization of both image presentation quality and peripheral communication efficiency without physical hardware changes.
3Quantity of substance
If USB link is used as auxiliary link, then increased bandwidth for peripheral communication is achieved, but additional cable complexity is introduced
Solution Approach 1:
The patent makes the existing four data serial links universally functional by enabling them to carry both display data and PCIe peripheral data. This eliminates the need for a separate USB auxiliary cable, as the same DISPLAYPORT cable infrastructure is reused for multiple purposes, reducing cable complexity while maintaining enhanced peripheral communication capability.
Solution Approach 2:
The system merges the display data communication function and peripheral communication function into a single cable infrastructure. By combining these functions over the same four data serial links through protocol reconfiguration, the patent avoids introducing additional cables or connectors, thereby reducing overall system complexity.
4Measurement precision
If all four data links are used for display communication, then high resolution image presentation is maintained, but peripheral communication bandwidth is limited
Solution Approach 1:
The patent implements dynamic bandwidth sharing where the allocation of the four data links between display and peripheral communication can be adjusted in real-time. When high resolution display is the priority, all links are dedicated to display; when peripheral communication needs increase, links are dynamically reassigned to PCIe protocol, maintaining both functions at adaptable performance levels.
Solution Approach 2:
The system changes operational parameters by reconfiguring the data links between different protocols and bandwidth allocation modes. This allows optimization of display resolution when needed and peripheral communication bandwidth when needed, with the ability to switch between these states based on system requirements.
Data Source
AI summary
A display cable supports communication of display information and peripheral information between a display and an information handling system by selectively adapting data links of the display cable to include peripheral information. The data links can switch between display information and peripheral information communication or can include identifier information to support switching of both types of information on a common data link.