Display Foil Linking Structure for Vibration-Stable Centering
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Solution Overview
Problem
In electrooptical display devices, especially in automotive applications, the reduced space and vibration tests cause foils to shift from their planned position, leading to black uniformity problems and friction marks.
Innovation Solution
The foils are connected together by a linking mechanism, such as welding, to maintain their position and prevent movement during vibration tests. This linking also utilizes bulges and recesses for centering, ensuring the foils remain in place without affecting the visible image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the foils are connected by a linking mechanism with centering features, then the positioning stability is improved, but the frame thickness increases to about 0.6 mm
Solution Approach 1:
The centering features utilize the thickness dimension of the foils themselves (creating bulges) rather than adding a separate thick frame structure. The bulges extend in the thickness direction and engage with recesses in the backplate, achieving centering functionality within the existing thin profile constraints.
Solution Approach 2:
The foils serve multiple functions: they are both the display component and the structural element providing centering features. The bulges on the foils simultaneously act as positioning elements and structural reinforcements, eliminating the need for separate centering mechanisms that would increase thickness.
2Strength
If the foils are welded together in the region of the centering features, then the positioning robustness is improved, but the manufacturing complexity increases
Solution Approach 1:
The welding process combines multiple functions into a single operation: it joins the foils together structurally and simultaneously forms the bulges that serve as centering features. This integration eliminates separate manufacturing steps for creating positioning features, reducing overall manufacturing complexity despite the welding process itself.
3Manufacturing precision
If the bulges are positioned in recesses of the backplate, then the centering precision is improved, but the device complexity increases
Solution Approach 1:
The foils themselves provide the centering features (bulges) that engage with the backplate recesses. The system uses its own structural elements for positioning rather than requiring external centering mechanisms, achieving precise positioning while minimizing additional device complexity.
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 effectively maintains the foils' position and prevents black uniformity issues during vibration tests, ensuring improved brightness uniformity and extended viewing angles without compromising the display's image quality.
Implementation Method 1
the foils are connected together by a linking mechanism, such as welding
Data Source
AI summary
An electrooptical display device comprising an electrooptical display and a plurality of foils which are arranged on one of another and the plurality of foils is situated in front of the electrooptical display, so that the plurality of foils is situated between the electrooptical display and a possible viewer or observer of the electrooptical display device is disclosed. The foils comprise centering features for centering the foils in a frame of the electrooptical display device and the foils are connected by a linking.