Segmented Display Frame With Injection Channels
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Solution Overview
Problem
Conventional methods for attaching optical surfaces in display devices integrated into vehicle trim elements often result in air bubbles and uneven adhesive distribution, leading to image quality deterioration and increased susceptibility to impacts and temperature variations.
Innovation Solution
A frame with segmented design and injection channel system that allows for uniform adhesive injection between optical surfaces, expelling air and preventing bubble formation, while maintaining a constant distance between surfaces for improved adhesion and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is deposited along a central line or diagonals of the first optical surface, then the adhesive can be applied to attach the two optical surfaces, but air bubbles are created inside the adhesive layer or at the interfaces between the adhesive and the optical surfaces
Solution Approach 1:
The patent uses a syringe to inject adhesive in a controlled manner, utilizing fluid dynamics to push air bubbles out through dedicated escape channels while the adhesive fills the space between optical surfaces. The injection system controls adhesive flow to prevent bubble entrapment during the bonding process.
Solution Approach 2:
The patent incorporates specific escape channels that allow air bubbles to be extracted and removed from the adhesive layer during the bonding process. These channels provide designated pathways for air to escape as adhesive is injected, preventing bubble formation in the final bonded structure.
2Reliability
If adhesive is distributed uniformly between the two optical surfaces, then the bonding quality improves, but runs are caused at the periphery of the optical surfaces which deteriorates image quality
Solution Approach 1:
The patent creates different zones within the adhesive application area: a first zone with escape channels for air bubble removal, and a second zone without escape channels where adhesive is contained to prevent peripheral runs. This local differentiation allows uniform adhesive distribution in the image area while preventing defects at the periphery.
Solution Approach 2:
The bonding area is segmented into multiple zones with different functions: zones with escape channels for air removal and zones without channels for controlled adhesive containment. This segmentation allows the adhesive to be distributed uniformly where needed while preventing runs at the periphery through controlled containment boundaries.
3Manufacturing precision
If optical adhesive is injected between the two optical surfaces, then the adhesive fills the space uniformly and drives out air, but the frame structure must accommodate injection orifices and channels
Solution Approach 1:
The frame structure merges multiple functions into its design: it provides structural support, defines the bonding area, incorporates injection orifices and channels for adhesive delivery and air escape, and creates containment zones. This integration reduces the need for separate components while achieving uniform adhesive filling.
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 solution ensures a homogeneous adhesive distribution, preventing air bubbles and enhancing the durability and optical performance of the display device by maintaining image quality and protecting against impacts and temperature variations.
Implementation Method 1
The injection channel makes it possible to inject the adhesive between the two optical surfaces in the form of a ply while generating a uniform adhesive front that moves from the first edge toward the opposite edge
Implementation Method 2
a display device that can be integrated into a trim element of a vehicle... An optical adhesive is arranged between first and second optical surfaces to improve the transmission of light
Implementation Method 3
Owing to the adhesive layer, the first optical surface can be protected from impacts and scratching and be less susceptible to substantial temperature differentials
Data Source
AI summary
A frame for a display device extends in a main plane. The frame includes a plurality of segments coupled to one another, including at least a first segment having at least one injection orifice allowing the injection of an optical adhesive. The plurality of segments defines an opening therebetween delimited by a plurality of inner edges facing each segment, including at least a first inner edge of the first segment. The first segment includes an injection channel having a first end and a second end. The first end is fluidly connected to the injection orifice, and the second end forms the first inner edge of the first segment.