Anti-Reflective Layer Extension for Display Bending Boundary
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Solution Overview
Problem
Existing display devices face challenges in minimizing the visibility of the boundary between the bending portion and the first portion when the display is bent, leading to potential external perception of the boundary, and there is a need to increase the coated area of the window on the anti-reflective layer effectively.
Innovation Solution
A display device design that includes a bending protective layer covered by an anti-reflective layer, with an adhesive layer between the bending protective layer and the anti-reflective layer, allowing the anti-reflective layer to extend to the bending portion and overlap it, ensuring the boundary is not perceived externally even when bent, and increasing the window's coated area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the anti-reflective layer is extended to cover the bending portion, then the boundary visibility is reduced and aesthetic performance is improved, but the manufacturing complexity increases
Solution Approach 1:
The anti-reflective layer is formed to extend into the bending portion before the window layer is applied. This preliminary extension ensures that when the display is bent, the anti-reflective layer already covers the bending portion, preventing boundary visibility without requiring additional post-processing steps.
Solution Approach 2:
The anti-reflective layer and window layer are combined in a sequential deposition process where the anti-reflective layer is formed first, then the window layer is applied on top. This merging of layers allows the anti-reflective layer to extend into the bending portion while maintaining the window layer's protective and optical functions.
2Area of stationary object
If the window coated area is increased by extending the anti-reflective layer, then the aesthetic performance is improved, but the adhesive layer separation risk increases
Solution Approach 1:
The adhesive layer is designed with different adhesion characteristics in different regions. The adhesive layer has stronger adhesion to the anti-reflective layer in the first portion and weaker adhesion in the bending portion, allowing controlled separation in the bending portion while maintaining strong bonding in the first portion.
Solution Approach 2:
The adhesive layer's bonding strength is made dynamic rather than uniform. The adhesion strength varies by location, being stronger in the first portion and weaker in the bending portion, allowing the structure to adapt to bending forces while maintaining structural integrity where needed.
3Shape
If the anti-reflective layer extends to the bending portion, then the boundary is effectively hidden, but the adhesive layer may separate under bending stress
Solution Approach 1:
The adhesive layer is designed with spatially varying adhesion properties. In the first portion, the adhesive layer provides strong bonding to maintain structural integrity. In the bending portion, the adhesive layer has reduced adhesion strength, allowing the bending protective layer to separate from the anti-reflective layer during bending while maintaining the overall aesthetic effect.
Data Source
AI summary
A display device includes: a display panel including a first portion, a second portion, and a bending portion disposed between the first portion and the second portion, a first black matrix disposed in the first portion and disposed adjacent to a boundary of the first portion, an anti-reflective layer disposed in the first portion to cover the first black matrix and extending to the bending portion, a second black matrix disposed on the anti-reflective layer, disposed adjacent to a boundary of the anti-reflective layer, and overlapping the first black matrix and the bending portion in a plan view, and a window disposed on the anti-reflective layer to cover the second black matrix.