Impact-Resistant Display Mounting for Vehicle Head Impact Safety
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Solution Overview
Problem
Conventional video display systems in vehicles face challenges in meeting Head Injury Criteria (HIC) without using extremely thick cover glass, as thick glass may not be practical due to extreme impact forces in collisions, and there is a risk of sharp shards or glass dislodgment causing additional injuries.
Innovation Solution
A video display system with an energy-absorbing bracket that secures the display screen to a support, absorbing a portion of impact force and directing the screen to a second position when the absorbed force reaches a threshold below the breakage force, thereby preventing sharp shard formation and dislodgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thick cover glass is used to meet Head Injury Criteria, then impact resistance is improved, but weight and practicality deteriorate
Solution Approach 1:
The mounting system is divided into multiple components: a first mounting structure attached to the display screen, a second mounting structure attached to the vehicle, and energy-absorbing elements positioned between them. This segmentation allows the impact resistance function to be distributed across multiple lighter components rather than concentrated in thick glass, resolving the contradiction between impact resistance and weight.
Solution Approach 2:
Energy-absorbing elements serve as intermediary components between the display screen and the vehicle mounting structure. These intermediaries absorb impact forces, protecting the glass from direct impact while avoiding the need for thick cover glass, thus maintaining light weight while achieving required impact resistance.
2Ease of manufacture
If conventional mounting is used to secure display screen, then ease of installation is improved, but safety under impact deteriorates
Solution Approach 1:
The mounting system incorporates movable energy-absorbing elements that can deform or move during impact events. This dynamic behavior allows the mounting to absorb impact energy while maintaining ease of installation through standardized mounting interfaces, resolving the contradiction between installation simplicity and impact safety.
3Weight of moving object
If thin glass is used to maintain practicality, then weight is reduced, but impact resistance deteriorates
Solution Approach 1:
Energy-absorbing elements are pre-positioned in the mounting system to provide cushioning before impact occurs. This beforehand cushioning protects thin glass from impact forces, allowing lightweight glass construction while maintaining impact resistance through the pre-positioned protective elements.
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 system effectively absorbs and disperses impact forces, preventing the display screen from shattering or dislodging, thus ensuring occupant safety without the need for extremely thick glass, while allowing for a safety margin to manage impact forces within safe limits.
Implementation Method 1
the bracket can be configured to absorb a portion of impact force applied to the display screen
Data Source
AI summary
A system and method for video display aboard an aircraft, automobile, or other vehicle includes a housing and an assembly including a display screen partially or completely contained within the housing. When the display screen is impacted by an object or a passenger of the vehicle, brackets and support members absorb and dissipate impact energy such that the display screen is prevented from breakage or dislodgement due to absorbed energy. Instead, the display screen may absorb impact energy insufficient to break it but sufficient to direct or shift the display screen from its original position to a new position. The video display system may also include spring-loaded or actuated brackets to return the display screen to its original position after an impact, and sensors to alert a user to inspect, repair or replace the brackets, display screen, or other system components.