Asymmetric Display Holder Structure for Headform Impact Mitigation
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Solution Overview
Problem
Existing display devices in vehicles do not adequately mitigate the impact of a headform impact, leading to potential injury, as they fail to meet safety standards such as the 80 G deceleration limit for more than 3 ms, and their complex configurations complicate the integration of impact mitigation mechanisms.
Innovation Solution
A display device with a holder that fixes the display asymmetrically to an instrument panel, where the rigidity to impact is asymmetrical, allowing the impactor to be decelerated more efficiently by shifting the load between sides, thereby reducing the duration of high deceleration and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a symmetrical fixing structure is used, then the display device is stable and easy to manufacture, but the impact deceleration time exceeds safety limits
Solution Approach 1:
The holder is designed with an asymmetric structure where the distance from the first holder portion to the center line is different from the distance from the second holder portion to the center line. This asymmetry creates different rigidities on either side of the display, enabling the impactor to shift load between sides during impact, thereby reducing the duration of high deceleration and meeting safety standards.
2Reliability
If a complex multi-component structure is used, then impact mitigation is achieved, but the device complexity increases
Solution Approach 1:
The holder integrates multiple functions into a single component: it fixes the display to the instrument panel, provides impact mitigation through asymmetric load shifting, and eliminates the need for separate bearing members and support members. This merging of functions reduces the number of parts while maintaining impact safety.
Solution Approach 2:
The holder serves multiple purposes: it acts as a fixing mechanism, an impact absorption structure, and a load distribution system. By making the holder multi-functional, the patent avoids the need for separate specialized components for each function, thereby reducing overall device complexity.
3Stability of the object's composition
If the display is firmly fixed, then the display stability is high, but the impact deceleration exceeds safety limits
Solution Approach 1:
The asymmetric holder structure allows the display fixing system to dynamically respond to impact forces. During impact, the load shifts between the first and second holder portions based on the impactor's movement, creating a dynamic load distribution that reduces peak deceleration duration while maintaining normal operational stability.
Data Source
AI summary
A display device includes a display having a display surface, and a holder that is provided on a surface of a side opposite the display surface of the display and that fixes the display to the fixing target. In a state in which the display device is fixed to the fixing target, when an impactor impacts the display surface on a center line that passes through a center of a display region of the display and that is perpendicular to the display region, a rigidity to impact of the display device is asymmetrical.