Adhesive Member Protrusion Pattern for Flexible Display Bubble Control
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Solution Overview
Problem
As large-area display panel assemblies are attached to adhesive members, improper attachment and the formation of air bubbles between the display panel assembly and the adhesive member occur, leading to delamination and deterioration of display visibility.
Innovation Solution
The use of an adhesive member with a protrusion pattern of different heights on its surface, which allows air bubbles to be discharged during attachment, enhancing adhesion and preventing delamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display panel assembly becomes larger to increase attachment area, then the adhesive member can cover more surface, but air bubbles form between the display panel assembly and the adhesive member during attachment
Solution Approach 1:
The adhesive member is divided into a pattern area with protrusion patterns and a non-pattern area without protrusion patterns. This segmentation allows different regions to serve different functions: the pattern area facilitates air bubble discharge while the non-pattern area provides strong adhesion.
Solution Approach 2:
Different areas of the adhesive member are given different local properties. The pattern area has protrusions that create air discharge pathways, while the non-pattern area maintains a flat smooth surface for optimal bonding. This local differentiation resolves the contradiction between large attachment area and air bubble prevention.
2Area of stationary object
If the adhesive member is formed as a large area to match the display panel assembly, then full coverage is achieved, but improper attachment occurs leading to delamination
Solution Approach 1:
The adhesive member is segmented into functional zones: pattern areas that facilitate air evacuation and non-pattern areas that provide reliable bonding. This segmentation maintains full coverage while preventing attachment failures.
Solution Approach 2:
The protrusion patterns act as intermediaries during the attachment process, creating pathways for air to escape as the adhesive member is applied to the display panel assembly. This prevents air entrapment and ensures reliable attachment.
3Illumination intensity
If air bubbles form between the display panel assembly and the adhesive member, then visibility is maintained initially, but the air bubbles swell due to heat generation during operation causing delamination and visibility deterioration
Solution Approach 1:
The protrusion patterns are pre-formed on the adhesive member to create air discharge pathways before attachment occurs. This preliminary structure prevents air bubble formation during the attachment process and eliminates the risk of future swelling and delamination.
Solution Approach 2:
The protrusion patterns, which might seem to reduce adhesive contact area, actually convert the harmful effect of air entrapment into a beneficial air discharge mechanism. The patterns guide air escape pathways that prevent bubble formation while maintaining sufficient adhesion in the non-pattern areas.
Data Source
AI summary
Embodiments of the disclosure relate to an adhesive member and a display device including the same and, more specifically, may provide a display device comprising a display panel assembly implementing an image, a supporting frame supporting a rear surface of the display panel assembly, and an adhesive member disposed between the display panel assembly and the supporting frame to couple the display panel assembly and the supporting frame, wherein the adhesive member has a protrusion pattern having different heights on one or two opposite surfaces thereof.