Display Device Adhesive Layer Segmentation for Bending
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Solution Overview
Problem
Existing display devices face challenges in easily bending and achieving a small radius of curvature, particularly due to the limitations in removing adhesive layers and films in targeted areas during manufacturing, which complicates the process and increases costs.
Innovation Solution
A method involving the formation of grooves in both the first film and adhesive layer to overlap with the bending area, allowing for the weakening and removal of adhesive forces, followed by precise cutting and removal of the film and adhesive layer using ultraviolet rays and laser beams, enabling easy bending and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the adhesive layer and first film are completely removed from the display panel, then the bending flexibility is improved, but the manufacturing complexity increases due to the need for precise targeted removal
Solution Approach 1:
The adhesive layer is divided into different regions with different adhesive forces. The first area (non-display area) has a first adhesive force that allows easy removal, while the second area (display area) has a second adhesive force that maintains bonding. This segmentation enables selective removal of the adhesive layer and first film from specific areas without affecting the entire structure, thus improving bending flexibility while controlling manufacturing complexity.
Solution Approach 2:
Different portions of the adhesive layer are given different properties: the first adhesive portion in the non-display area has weakened adhesive force for easy removal, while the second adhesive portion in the display area maintains strong adhesive force. This local differentiation allows the structure to have both removable sections for flexibility and bonded sections for stability, resolving the contradiction between flexibility and manufacturing complexity.
2Ease of manufacture
If the adhesive force is weakened in the first area to enable easy removal, then the ease of manufacture is improved, but the reliability of the bonding in the second area must be maintained
Solution Approach 1:
The adhesive layer is segmented into a first adhesive portion and a second adhesive portion with different adhesive forces. The first adhesive portion in the non-display area has weakened adhesive force for easy removal during manufacturing, while the second adhesive portion in the display area maintains strong adhesive force for reliable bonding. This segmentation allows easy manufacture in removal areas while preserving bonding reliability in functional areas.
Solution Approach 2:
The adhesive layer exhibits local quality differentiation where the first adhesive portion has different (weakened) adhesive properties compared to the second adhesive portion. This local quality variation enables the adhesive layer to be easily removable in specific manufacturing areas while maintaining reliable bonding in other areas, thus improving ease of manufacture without compromising bonding reliability.
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
This approach simplifies the manufacturing process, reduces costs, and allows for the display device to be easily bent with a smaller radius of curvature, enhancing its flexibility and manufacturing efficiency.
Implementation Method 1
the weakening the adhesive force includes irradiating an ultraviolet ray to the first area along an upper direction extending from the lower surface of the display panel to the upper surface of the display panel
Implementation Method 2
the cutting the first film and the adhesive layer is performed by irradiating a laser beam along the upper direction
Implementation Method 3
the cutting the first film and the adhesive layer is performed by irradiating a laser beam along the upper direction
Data Source
AI summary
A display device and a method of manufacturing a display device are provided. A manufacturing method of a display apparatus includes forming a display module including a first area and including a display panel including lower and upper surfaces opposite each other, a first film under the lower surface of the display panel, a second film on the upper surface of the display panel, and an adhesive layer between the lower surface of the display panel and the first film; weakening an adhesive force of a first adhesive portion of the adhesive layer in the first area to be weaker than an adhesive force of a second adhesive portion of the adhesive layer outside the first area; cutting the first film and the adhesive layer; and removing a portion of the first film and the first adhesive portion from the first area.