Aircraft Cockpit Display Segmentation for Single Failure Resilience
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Solution Overview
Problem
Contemporary aircraft cockpits with large widescreen displays are vulnerable to significant disruptions due to single failures in power circuitry, timing controls, or display drivers, leading to partial or full screen corruption, which can severely impact flight operations.
Innovation Solution
The implementation of independent video channels with row and column drivers, along with a switch to select between channels, ensures high availability by minimizing the impact of single failures, allowing the flight display module to maintain primary display functions even if one channel fails, and includes an automatic switching mechanism to prevent corruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single large widescreen display is used to provide more information to the flight crew, then the display surface area and information capacity are improved, but the system reliability deteriorates because a single failure can corrupt the entire display
Solution Approach 1:
The display system is segmented into multiple independent video channels (first video channel with first row driver and first column driver, second video channel with second row driver and second column driver). Each channel can independently drive portions of the liquid crystal matrix, so that a failure in one channel does not corrupt the entire display. The switch enables selection between channels, providing redundancy and maintaining system reliability while preserving the large display surface area.
2Reliability
If multiple independent video channels with separate drivers are implemented to improve reliability, then the system reliability is improved by preventing total display loss, but the device complexity increases due to additional drivers and switching mechanisms
Solution Approach 1:
The display system is divided into multiple independent video channels, each with its own row driver and column driver. This segmentation provides redundancy so that if one channel fails, another can take over, improving reliability. The complexity is managed by organizing the drivers into modular channels that can be independently controlled.
Solution Approach 2:
The liquid crystal matrix and backlight serve multiple functions by being capable of being driven by different video channels. The same display hardware can display different video signals depending on which channel is selected, providing multi-functionality without requiring separate physical displays for each channel.
3Ease of operation
If a switch is added to select between independent video channels to maintain display functionality, then the ease of operation is improved by allowing manual channel selection, but the device complexity increases due to the additional switching component
Solution Approach 1:
The switch provides manual control capability, allowing the operator to select between different video channels. This adds ease of operation by enabling direct user intervention when display issues occur, while the underlying multi-channel architecture provides automatic redundancy. The switch is a simple component that leverages the existing multi-functional display hardware.
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 design enhances system availability by ensuring that only a portion of the display is affected by a single failure, maintaining readability and reducing maintenance delays, as the system can automatically switch to an alternate channel in case of faults, thus preventing the total loss of primary flight instruments.
Implementation Method 1
a display panel having a liquid crystal matrix with pixels arranged in rows and columns, a backlight for illuminating the liquid crystal matrix
Implementation Method 2
a backlight having an array of LEDs for illuminating the liquid crystal matrix
Data Source
AI summary
An aircraft cockpit display includes among other things an LCD panel having a liquid crystal matrix, and backlight assembly for illuminating the liquid crystal matrix. The remainder of the display allows for single point failures within the architecture that impact only a portion of the primary display functions of the LCD panel.