Curved Display Cut Patterns for Stress Distribution
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Solution Overview
Problem
Existing display devices face challenges in efficiently distributing stress across curved surfaces, leading to potential separation or delamination of layers, and in minimizing external light reflection, which affects assembly and display quality.
Innovation Solution
A display device design featuring a curved plastic substrate with a light absorption layer, a cushion layer, and an electrostatic shielding layer, all with cut patterns that extend across the display area and non-display area, and an adhesive layer with embossed and debossed portions to manage stress and reduce light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If layers are stacked continuously over curved surfaces, then structural integrity is maintained, but stress distribution becomes uneven causing delamination
Solution Approach 1:
The patent applies segmentation by introducing cut patterns that divide the continuous layers (light absorption layer, cushion layer, electrostatic shielding layer) into segmented regions. These cuts allow stress to be released and distributed more evenly across the curved substrate, preventing delamination while maintaining overall layer integrity. The cut patterns create discrete segments that can accommodate curvature-induced stress without causing continuous layer separation.
2Object-affected harmful factors
If external light reflection is minimized through continuous layers, then display quality improves, but assembly complexity increases
Solution Approach 1:
The patent segments the light absorption layer and other functional layers into cut-patterned regions, which simplifies the assembly process while maintaining light reflection control. The segmented structure allows for easier alignment and assembly compared to continuous layers, reducing assembly complexity while still effectively minimizing external light reflection through the distributed light absorption material.
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 design effectively distributes stress across the curved substrate, preventing layer separation and minimizing external light reflection, thereby enhancing assembly efficiency and display quality.
Implementation Method 1
a light absorption layer curved in conformity with the plastic substrate, the light absorption layer being over a second surface which is an opposite side of the first surface of the plastic substrate
Implementation Method 2
an adhesive layer between the second surface of the plastic substrate and the light absorption layer, the adhesive layer including debossed portions and embossed portions, the embossed portions being convex in a thickness direction of the adhesive layer toward the plastic substrate
Data Source
AI summary
A display device includes a curved plastic substrate, a display element layer over a first surface of the plastic substrate, a thin film encapsulation layer over the display element layer, a light absorption layer curved in conformity with the plastic substrate, the light absorption layer being over a second surface of the plastic substrate, the second surface being opposite to the first surface, a cushion layer over a fourth surface of the light absorption layer, a third surface of the light absorption layer facing the plastic substrate, and the fourth surface of the light absorption layer being opposite the third surface, and an electrostatic shielding layer over the cushion layer, at least one of the cushion layer and the electrostatic shielding layer has a cut pattern in a thickness direction thereof.