Transparent Cover Display Assembly With Reflection-Free Adhesive Mounting
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Solution Overview
Problem
Existing display arrangements with pixel matrix displays under transparent covers face issues of reflections due to air layers, mechanical damage from adhesive coupling, and uneven adhesive formation, which compromise both optical clarity and mechanical integrity.
Innovation Solution
A method involving a support frame and transparent cover forming an intermediate space filled with thermoplastic elastomer for secure bonding, followed by a transparent adhesive layer to fix the pixel matrix display, ensuring reflection-free coupling and mechanical protection by keeping the display surface freely suspended.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display surface is coupled to the cover by an adhesive layer with matching refractive index, then reflections are reduced and optical clarity is improved, but the mechanical advantage of air isolation is lost and the display becomes vulnerable to mechanical damage
Solution Approach 1:
The patent divides the coupling system into two separate functional layers: an adhesive layer for optical coupling (refraction matching) and a separate mechanical protection layer (such as a border or frame structure) that provides mechanical isolation. This segmentation allows each layer to optimize its specific function without compromising the other.
Solution Approach 2:
The patent introduces an intermediary mechanical protection structure (border, frame, or recess) between the display surface and the cover edge. This intermediary element absorbs mechanical stresses and prevents direct force transmission to the display, while allowing the adhesive layer to maintain optimal optical coupling.
2Reliability
If liquid adhesive is used to couple the display surface to the cover, then reliable bonding is achieved, but losses of liquid adhesive lead to uneven adhesive layer formation
Solution Approach 1:
The patent applies a preliminary protective layer (such as a release film or transfer layer) on the display surface before adhesive application. This preliminary layer controls adhesive distribution and prevents loss, ensuring uniform thickness. After bonding, the preliminary layer is removed or remains as a protective element.
Solution Approach 2:
The patent uses a flexible thin film structure as the adhesive layer carrier or protective layer, which can conform to the display surface and maintain uniform adhesive distribution. This film structure prevents adhesive loss while ensuring even bonding across the entire display surface.
3Strength
If the display surface is coupled directly to the cover, then mechanical strength is maximized, but forces acting on the cover cause irreversible damage to the pixel matrix display
Solution Approach 1:
The patent extracts the mechanical protection function from the direct cover-display coupling and places it in a separate dedicated structure (such as a border, frame, or recessed mounting area). This allows the main cover to provide structural strength while the extracted protection element specifically shields the display from impact forces.
Solution Approach 2:
The patent incorporates a cushioning element or compliant layer between the cover and display surface that provides beforehand protection against mechanical impacts. This cushioning layer absorbs shock forces before they reach the pixel matrix display, preventing damage while maintaining overall structural integrity.
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 provides a reflection-free optical coupling with a uniform adhesive layer, ensuring reliable fastening and minimizing mechanical damage to the pixel matrix display, while maintaining optical clarity and mechanical protection.
Implementation Method 1
By subsequently solidifying the thermoplastic elastomer, the support frame is fixed on the cover by a material-bonding connection
Implementation Method 2
the adhesive layer, which has an optical refractive index identical or approximately identical to the material of the cover
Data Source
AI summary
The present disclosure relates to a display arrangement, including: a cover that is transparent at least in some regions; a support frame adapted to fix the display arrangement on a supporting structure; a pixel matrix display having a display surface; a housing; wherein the support frame is arranged adjacent to the cover and an intermediate space, which is delimited by the support frame and the cover, is formed and is filled with a thermoplastic elastomer; wherein the cover and the support frame form a well, in which the pixel matrix display is accommodated; wherein a transparent adhesive layer is formed in the well between the display surface and the cover to fix the pixel matrix display on the cover, with the display surface being visible through the cover and the adhesive layer; wherein the housing fits over the pixel matrix display and is fixed on the support frame.