Vehicle Display Fixation Element for Thermal Stress Compensation
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Solution Overview
Problem
Conventional display systems in vehicles face challenges due to differing thermal expansion coefficients between the cover lens and the frame, leading to high shearing stresses and adhesive failure, especially across varying temperatures, which complicates the design and reduces the viewing area.
Innovation Solution
A display system with a fixation element comprising a first part securely attached to the layer and a second part that extends into recesses in the frame, providing a flexible connection to compensate for temperature expansion differences, using a combination of rigid and flexible fixation methods such as adhesives, silicon, bolts, and screws to maintain a stable bond across temperature ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive amount is increased to improve bond robustness, then fixation strength is improved, but viewing area is reduced due to larger border
Solution Approach 1:
The fixation system is divided into two distinct parts: a first part that rigidly secures the layer to prevent delamination, and a second part that flexibly compensates for thermal expansion differences. This segmentation allows the adhesive to be used efficiently without excessive amounts, maintaining bond strength while minimizing border size and preserving viewing area.
Solution Approach 2:
The invention changes the mechanical parameters of the fixation system by introducing flexibility through the second part of the fixation element. This allows the system to adapt to thermal expansion variations without requiring increased adhesive quantity, thereby maintaining both bond robustness and minimal border appearance.
2Reliability
If adhesive amount is increased to compensate for thermal expansion differences, then fixation robustness is improved, but adhesive thickness increases
Solution Approach 1:
The fixation element is segmented into two functional parts: the first part provides rigid securing with minimal adhesive thickness, while the second part provides flexible compensation for thermal expansion. This segmentation eliminates the need to increase adhesive thickness, as the flexible second part compensates for thermal variations without requiring additional adhesive material.
Solution Approach 2:
The second part of the fixation element acts as an intermediary between the rigid first part and the frame, absorbing thermal expansion differences through its flexible connection. This intermediary function allows the use of thin adhesive layers while maintaining fixation robustness across temperature variations.
3Strength
If rigid fixation is used to secure layer to frame, then fixation strength is improved, but stress from thermal expansion differences increases
Solution Approach 1:
The fixation system is divided into a rigid first part for secure attachment and a flexible second part for stress absorption. The rigid first part maintains fixation strength, while the flexible second part reduces shearing stress by accommodating thermal expansion differences, resolving the contradiction between strength and stress reduction.
Solution Approach 2:
The fixation system transitions from a purely rigid connection to a dynamic system where the second part can flex and adapt to thermal expansion variations. This dynamic capability allows the rigid first part to maintain strong fixation while the flexible second part actively reduces stress through movement, preventing adhesive failure.
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 solution enhances the robustness of the fixation, reduces stress from temperature changes, and increases the display area by allowing for a larger interface and flexible adaptation to thermal expansion, while maintaining structural integrity and minimizing adhesive thickness.
Implementation Method 1
differing thermal expansion coefficients induce thermal stresses into the conventional display, particularly the adhesive
Data Source
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AI summary
A fixation element for securing one or more layers of a display system to a frame of the display system. The fixation element includes a first part and a second part. The second part of the fixation element extends from the first part. The first part of the fixation element secures to the one or more layers. The frame includes a recess for receiving the second part of the fixation element. The second part of the fixation element secures in the recess of the frame.