Monitor Glass Perimeter Cover for Aircraft Safety
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Solution Overview
Problem
Conventional video monitor assemblies fail to prevent glass fragments from escaping forward and laterally after shattering, which is a concern for aircraft safety during emergencies.
Innovation Solution
A monitor perimeter cover is bonded to the glass screen, overlapping the outer perimeter by a minimum of 2.5 mm on all sides, creating a continuous seal with the protective film to contain glass fragments, and includes features like lateral tabs for secure fastening to a seatback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective film is applied to the glass screen, then glass fragment retention is improved, but glass fragments still escape through the sides and forward of the monitor
Solution Approach 1:
The perimeter cover extends the containment from a two-dimensional film on the screen surface to a three-dimensional structure that wraps around the edges and projects forward, creating containment in multiple spatial dimensions (lateral, forward, and edge directions) simultaneously
Solution Approach 2:
The containment system is divided into two functional segments: the protective film that adheres to the glass screen surface, and the perimeter cover that frames and seals the edges, with each segment addressing specific escape pathways
2Reliability
If the perimeter cover overlaps more of the glass screen perimeter, then glass fragment containment is improved, but the visible screen area is reduced
Solution Approach 1:
The perimeter cover is strategically positioned to provide maximum overlap (2.5 mm or more) at the critical edge regions where glass fragments escape, while maintaining minimal intrusion into the central viewing area of the screen
3Ease of manufacture
If adhesive bonding is used to attach the perimeter cover, then installation simplicity is improved, but bonding strength may be insufficient under crash conditions
Solution Approach 1:
The attachment system merges two bonding mechanisms: adhesive bonding for simple installation and mechanical fastening through lateral tabs for enhanced strength, creating a hybrid system that provides both ease of installation and crash-worthy retention
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
Effectively prevents glass fragment escape in both forward and lateral directions, enhancing safety by maintaining a secure containment system within the video monitor assembly.
Implementation Method 1
the frame portion of the perimeter cover may be adhesively bonded to the film covering the front face of the glass screen
Data Source
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AI summary
A video monitor assembly including a video monitor (102) having a film-covered glass screen (104), a perimeter cover (110) affixed to the video monitor having a frame portion (112) overlapping an outer perimeter of the front face of the glass screen continuously along the outer perimeter thereof, and a continuous seal provided between the frame portion of the perimeter cover and the overlapped portion of the front face of the glass screen to prevent glass fragment escape in a direction forward of the glass screen in the event of fracture of the glass screen.