Curved Display Wall Structure for Adhesive Control
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Solution Overview
Problem
The existing optical bonding process for attaching displays on curved covers faces challenges such as uneven adhesive coating, adhesive overflow, and bubble formation due to manufacturing tolerances, leading to quality issues and reduced visibility.
Innovation Solution
Incorporating a wall structure on the curved cover with one surface in contact with the adhesive layer, extending along the side surface, and featuring an inner wall, outer wall, and protrusions to prevent adhesive overflow and bubble formation, while allowing for even adhesive application and reduced material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If liquid optical adhesive material is coated on a curved cover to attach a display, then the display can be bonded to the curved surface, but the adhesive coating becomes uneven due to curvature, lowering manufacturing precision
Solution Approach 1:
A resin dam structure is introduced as an intermediary element between the curved cover and the optical adhesive material. The resin dam is formed along the edge of the curved surface and provides a controlled boundary that guides the liquid OCR to spread uniformly. This mediator structure enables even adhesive coating on curved surfaces by preventing uncontrolled flow while maintaining the bonding capability.
Solution Approach 2:
The resin dam is formed in advance before applying the optical adhesive material. By pre-forming the dam structure on the curved cover, the subsequent application of liquid OCR is controlled, ensuring uniform distribution within the confined space. This preliminary action eliminates the need for complex real-time control during adhesive application.
2Reliability
If liquid optical adhesive material is applied generously to ensure complete coverage, then bonding reliability improves, but adhesive overflows into other members due to manufacturing tolerances, causing harmful effects
Solution Approach 1:
The resin dam acts as a physical barrier and intermediary structure that confines the liquid optical adhesive material within the intended bonding area. By forming this dam along the edges, the system can use sufficient adhesive for reliable bonding without risking overflow into adjacent components, as the dam structure prevents uncontrolled spread.
Solution Approach 2:
The resin dam structure is formed in advance to prevent the harmful effect of adhesive overflow before it can occur. By establishing these boundary structures beforehand, the system proactively counteracts the potential problem of adhesive migrating into other members during the bonding process.
3Illumination intensity
If optical adhesive material is used to bond display on curved cover, then visibility improves compared to air gap method, but bubbles remain in the adhered portion, reducing quality
Solution Approach 1:
The resin dam structure serves as a mediator that controls the flow and distribution of optical adhesive material on curved surfaces. By confining the liquid OCR within the dam boundaries and providing a controlled environment for bonding, the system achieves bubble-free adhesion while maintaining the visibility benefits of optical bonding.
4Ease of manufacture
If resin dam is formed using liquid resin coating method, then the process is simple and easy to manufacture, but the dam shape and thickness are difficult to control uniformly on curved surfaces, lowering manufacturing precision
Solution Approach 1:
The resin dam is formed as a preliminary structure before adhesive application, and its shape is controlled by the curvature of the cover itself. By utilizing the natural curvature of the cover to guide the resin flow and solidification process, the method achieves uniform dam formation without requiring complex external molds or precision control mechanisms.
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 wall structure ensures uniform adhesive application, prevents adhesive overflow, effectively discharges bubbles, and enhances the durability and visibility of the display assembly by reducing reflectance and improving the bonding process.
Implementation Method 1
The optical adhesive material has a refractive index equivalent to that of a member with which the cover or the display is brought into contact, thereby lowering light reflectance at a boundary between the optical adhesive material and the member.
Data Source
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AI summary
The present invention relates to a display assembly comprising: a cover provided with a curved surface formed so as to be bent; a display arranged on the curved surface; an adhesive layer arranged between the cover and the display; and a wall structure which is arranged on the cover and of which one surface is brought into contact with the curved surface and the other surface is brought into contact with a side surface of the adhesive layer, so as to be extendedly formed along the side surface of the adhesive layer.