Display Panel Ink-Layer Structure for Adhesion Defect Reduction
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Solution Overview
Problem
The issue of adhesive layer leftovers and adhesion defects occur when laminating a cover window and panel layer in display devices due to the adhesive layer being swept during the lamination process.
Innovation Solution
Incorporating a second ink layer with an embossed or engraving coarse pattern below the cover window, and optionally a third ink layer further inward, to minimize adhesive layer contact and improve adhesion with the middle frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an adhesive layer is applied to the cover window for laminating the panel layer, then the cover window and panel layer can be bonded together, but adhesive layer leftovers remain on the side of the cover window causing adhesion defects
Solution Approach 1:
The patent extracts the harmful function of the adhesive layer by introducing ink layers that selectively absorb and remove excess adhesive from the cover window surface. The ink layers act as a separation mechanism that extracts the unwanted adhesive leftovers while allowing the bonding function to remain intact.
Solution Approach 2:
The ink layers serve as an intermediary substance between the adhesive layer and the cover window. This intermediary absorbs and retains the adhesive leftovers, preventing them from causing adhesion defects while the primary adhesive bonding function continues to operate.
2Manufacturing precision
If the adhesive layer is swept during lamination to remove leftovers, then cleanliness improves, but adhesion defects occur
Solution Approach 1:
The patent converts the harmful adhesive leftovers into a beneficial state by using ink layers that selectively absorb and retain the excess adhesive. The harmful substance (adhesive leftover) is transformed from a defect-causing element into a controlled component that is managed by the ink layer's absorption properties.
3Manufacturing precision
If multiple ink layers are applied below the cover window, then adhesive leftovers are reduced and middle frame adhesion is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The patent segments the ink layer into multiple functional layers with distinct roles. The first ink layer absorbs adhesive leftovers from the cover window, while the second ink layer provides adhesion for the middle frame. This segmentation allows each layer to be optimized for its specific function, resolving the contradiction between precision and complexity.
Solution Approach 2:
Different regions of the ink layer structure are assigned different qualities and functions. The first ink layer has high absorption quality for adhesive leftovers, while the second ink layer has high adhesion quality for the middle frame. This local differentiation of qualities allows the system to achieve multiple objectives simultaneously.
Data Source
AI summary
Disclosed is a display panel and a manufacturing method thereof. The display panel includes a plurality of ink layers applied in a cover window and a manufacturing method thereof.