Curved Display Cover Window Adhesive Attachment Area
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Solution Overview
Problem
Display devices with curved surfaces face challenges in securing a sufficient attachment area between the cover window and the middle frame while minimizing the width of the bending area, which affects aesthetics and structural integrity.
Innovation Solution
A display device design incorporating a cover window with a central and curved portion, a middle frame, a coupling layer made of adhesive material, and fillers to enhance attachment and impact protection, where the curved portion tapers as it moves away from the central portion and the fillers are made of resin to ensure secure adhesion and reduced bending area width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a cover window with a curved surface is used to improve aesthetics, then the appearance quality is improved, but the attachment area between the cover window and middle frame is reduced
Solution Approach 1:
The patent introduces a thickness dimension to resolve the attachment area problem. By creating a first coupling layer with sufficient thickness between the curved cover window and middle frame, the attachment area is expanded in the thickness direction (z-axis), compensating for the reduced planar attachment area caused by the curved surface design.
Solution Approach 2:
The patent employs a composite structure consisting of the cover window, first coupling layer, and middle frame. This composite material approach allows the curved cover window to maintain its aesthetic shape while the coupling layer provides sufficient attachment area and bonding strength through its adhesive material composition.
2Length of moving object
If the curved portion is made thinner to reduce bending area width, then the bending area width is reduced, but the structural strength is weakened
Solution Approach 1:
The patent applies local quality by making the curved portion thinner specifically in the bending area to reduce overall device width, while compensating for the resulting strength reduction through the first coupling layer that provides localized structural support and reinforcement at the critical attachment region.
Solution Approach 2:
The first coupling layer acts as a pre-installed cushioning element that compensates for the weakened structural strength caused by the thinner curved portion. This layer is positioned beforehand to provide mechanical support and distribute stresses, preventing potential failure points in the thinned curved section.
3Area of stationary object
If a first coupling layer with sufficient thickness is introduced to increase attachment area, then the attachment area is improved, but the device complexity increases
Solution Approach 1:
The first coupling layer serves multiple functions simultaneously: it provides the necessary attachment area for bonding, acts as a structural reinforcement for the thinner curved portion, and functions as an adhesive interface between the cover window and middle frame. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in 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 secures a sufficient attachment area between the cover window and the middle frame, enhances impact protection, and reduces the width of the bending area, thereby improving the structural integrity and aesthetics of the display device.
Implementation Method 1
a first coupling layer disposed between the curved portion of the cover window and the middle frame and made of an adhesive material
Implementation Method 2
a first filler filled in a space between the curved portion of the cover window and the display member
Data Source
AI summary
A display device includes: a display member; a cover window covering an upper portion of the display member and having a central portion and a curved portion; a lower cover covering a lower portion of the display member; a middle frame disposed between the cover window and the lower cover; a first coupling layer disposed between the curved portion of the cover window and the middle frame and made of an adhesive material; and a first filler filled in a space between the curved portion of the cover window and the display member, where at least a portion of the first coupling layer and the first filler overlap in a thickness direction of the display member.