Display Cable Link Training for Hinge Wear Failure Prediction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in portable information handling systems is the unpredictable failure of hinge up cables due to wear and tear, leading to inefficient recycling and increased environmental impact, with existing robust cable solutions being costly and complex, and the difficulty in tracking remaining life and predicting future failures.
Innovation Solution
A snap-in cable retainer system that couples a cable backplane to the information handling system housing, with edge card connectors and a communication link monitored through link training events to predict failures and reduce cable complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If robust cable solutions are used to prevent hinge up cable failure, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent changes the physical and chemical parameters of the cable by applying conformal coating materials to the flexible printed circuit board. This coating process modifies the cable's resistance to environmental factors such as moisture and corrosion, thereby improving reliability without adding mechanical complexity. The coating parameters (thickness, material composition) are optimized to provide protection while maintaining flexibility and signal integrity.
2Reliability
If multiple cables are used to communicate between motherboard and display, then reliability is improved through redundancy, but device complexity increases
Solution Approach 1:
The patent merges multiple communication functions into a single flexible printed circuit board cable. The cable integrates multiple signal traces, power lines, and ground connections that previously required separate cables. This consolidation reduces the number of connectors and cable routing complexity while maintaining all necessary communication channels between the motherboard and display through the hinge-up configuration.
Solution Approach 2:
The flexible printed circuit board cable serves multiple functions simultaneously: it provides power delivery, data communication, and signal transmission between the motherboard and display. The cable is designed to handle various signal types (high-speed data, low-speed control, power) through different trace configurations on the same physical medium, eliminating the need for separate dedicated cables for each function.
3Reliability
If cable failure monitoring is implemented through link training events, then reliability prediction is improved, but use of energy increases
Solution Approach 1:
The patent implements periodic link training events at predetermined intervals to monitor cable health. Instead of continuous monitoring, the system performs link training at scheduled times (e.g., during display mode changes, power state transitions, or at fixed time intervals). This periodic approach provides sufficient data for reliability prediction while significantly reducing energy consumption compared to continuous monitoring. The link training process measures signal quality parameters and compares them against thresholds to detect degradation trends.
Data Source
AI summary
An information handling system display cable communicates visual information from a motherboard to a display by defining link parameters with a link training, such as through a DisplayPort eDP link training. A link training failure rate is tracked when a link fails and is re-trained, including link parameters like bitrate. The link training failure rate and link parameters are analyzed to evaluate the display cable condition, such as for reuse or recycling. In one embodiment, the display cable link training failure rate and parameters are tracked in display non-transitory memory and downloaded when the display ships to a repair center.