Curved-Corner Display Assembly Without Cover Panel Wrinkling
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Solution Overview
Problem
Attaching a cover panel to a display device with a curved corner portion is challenging due to difficulties in reliably securing it without wrinkles, and ensuring light blocking, shielding, and impact resistance.
Innovation Solution
A display device design that includes a patterned film with a coating layer on the rear surface, where the cover panel is attached to the patterned film over a flat area and a coating layer is used in the curved corner area, comprising a primer, foam, and hard coating layers to provide adhesion and functional protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a cover panel is attached to the curved corner portion of the display panel, then impact resistance and shielding are improved, but wrinkles occur and attachment reliability deteriorates
Solution Approach 1:
The patent divides the protective structure into two separate segments: a cover panel for the flat front portion and a coating layer for the curved corner portion. This segmentation allows each component to be optimized for its specific function without the attachment reliability issues that arise when a single cover panel attempts to cover both regions.
Solution Approach 2:
The patent applies different protective solutions to different regions: a cover panel with adhesive for the flat front portion where reliable attachment is needed, and a coating layer with foam and hard coating for the curved corner portion where impact resistance is prioritized. This local quality approach resolves the contradiction by matching the protective mechanism to the specific requirements of each region.
2Strength
If a cover panel is attached to the curved corner portion, then shielding and impact resistance are improved, but light blocking performance deteriorates due to wrinkles
Solution Approach 1:
By segmenting the protective structure so that the coating layer (without wrinkles) covers the curved corner portion while the cover panel covers the flat front portion, the patent eliminates wrinkle-induced light leakage in the corner region while maintaining shielding and impact resistance.
Solution Approach 2:
The coating layer is specifically designed for the curved corner portion with light-blocking properties, while the cover panel with adhesive provides shielding for the flat front portion. This local quality differentiation ensures optimal light blocking performance in both regions without the degradation caused by wrinkles.
3Area of moving object
If the screen-to-body ratio is increased by forming curved edges, then display area is improved, but attachment difficulty increases
Solution Approach 1:
The patent segments the protective structure into a cover panel for the flat display area and a coating layer for the curved corner portions, enabling the screen-to-body ratio to be increased through curved edges while maintaining manageable attachment complexity for each segment.
Data Source
AI summary
A display device including a display panel including a front portion and a corner portion disposed at a corner of the front portion, a patterned film disposed on a rear surface of the display panel, a cover panel disposed on the rear surface of the patterned film and overlapping the front portion, and a coating layer disposed on the rear surface of the patterned film and overlapping the corner portion.