Curved Display Module Cambered Corner Design
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Solution Overview
Problem
Curved display modules are prone to wrinkling at corners due to high curvature, leading to low attachment yield and poor display effects, as the existing uniform thickness and curvature designs exceed the display panel's compression limits.
Innovation Solution
A display module design featuring a curved display panel attached to a curved cover plate with cambered corners, where the thickness of the target structure at corners is greater than at other positions, and the radius of curvature of the display panel is greater than that of the cover plate, reducing the degree of curvature and preventing wrinkling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform thickness and curvature design is used, then manufacturing is simple, but the display panel exceeds compression limits and wrinkles at corners
Solution Approach 1:
The patent applies local quality by varying the thickness of the adhesive layer at different locations. Specifically, the adhesive layer has a first thickness at corner regions and a second thickness at non-corner regions, with the first thickness being greater than the second thickness. This local variation in adhesive thickness accommodates the different curvature requirements at corners versus straight edges, preventing wrinkling while maintaining manufacturing feasibility.
Solution Approach 2:
The patent changes the physical parameters of the adhesive layer, specifically its thickness, to resolve the contradiction. By adjusting the adhesive thickness parameter locally (thicker at corners, thinner at edges), the design accommodates the varying compression demands across the curved display surface, preventing excessive compression at corners that would cause wrinkling.
2Shape
If high curvature is used at corners, then the curved display appearance is achieved, but the display panel wrinkles and cracks at corners
Solution Approach 1:
The patent applies local quality by providing the curved display panel with different radius of curvature values at different locations. The panel has a first radius of curvature at corner regions and a second radius of curvature at non-corner regions, where the first radius is greater than the second radius. This means the corners have a gentler curve while the edges have a tighter curve, maintaining the overall curved appearance while preventing excessive compression at corners.
Solution Approach 2:
The patent resolves the curvature-strength contradiction by introducing an additional dimension of variation - the radius of curvature itself varies across the panel surface. Rather than a single uniform curvature, the panel transitions from tighter curvature at edges to gentler curvature at corners, creating a multi-dimensional curvature profile that maintains aesthetic appearance while preserving structural integrity.
3Area of stationary object
If the cover plate edge is bent toward the adhesive, then corner coverage is improved, but the curvature at corners increases and causes wrinkling
Solution Approach 1:
The patent applies local quality by making the adhesive layer thickness position-dependent, with thicker adhesive at corners and thinner adhesive at edges. This local variation compensates for the increased curvature at bent cover plate corners, providing sufficient adhesive material to accommodate the corner geometry without causing wrinkling or detachment.
Data Source
AI summary
A display module includes a curved display panel and a curved cover plate that are attached by an adhesive, wherein at least one corner formed respectively by a cover plate body and a cover plate edge of the curved cover plate is a cambered corner. A thickness of a target structure at a target corner is greater than thicknesses of the target structure at other positions, the target structure being at least one of the cover plate edge and the adhesive, and a radius of curvature of the curved display panel is greater than a radius of curvature of a side, distal from the curved display panel, of the target structure.