Foldable Display Bonding Structure to Reduce Orange Peel
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Solution Overview
Problem
The orange peel phenomenon occurs on the surface of foldable display devices due to the bonding of rigid constituent elements with thin films, affecting the display quality.
Innovation Solution
A display apparatus design where the backplate and plate assembly are coupled with a first bonding member that is thicker than the second bonding member, and the second bonding member has a higher modulus and smaller thickness, reducing the deformation pattern and restrictive forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid constituent elements (plate assembly) are bonded to thin films (display panel) to reinforce rigidity and implement foldability, then structural strength and foldability are improved, but orange peel phenomenon occurs on the surface affecting display quality
Solution Approach 1:
The patent changes the physical parameters of the bonding members by making the first bonding member thicker than the second bonding member. This parameter change allows the first bonding member to provide sufficient structural support while the thinner second bonding member minimizes surface deformation, thereby resolving the orange peel phenomenon while maintaining structural rigidity.
2Reliability
If a plate assembly is added to protect the rear surface and reinforce rigidity, then device durability and structural stability are improved, but the complexity of the device structure increases
Solution Approach 1:
The patent merges the protective and reinforcing functions into a single plate assembly that is bonded to the display panel. By using two bonding members with different thicknesses, the design achieves both protection and rigidity enhancement without requiring separate components, thus improving reliability while controlling structural complexity.
3Manufacturing precision
If the first bonding member is made thicker to reduce restrictive forces and deformation, then orange peel phenomenon is reduced, but the overall device thickness increases
Solution Approach 1:
The patent applies local quality by making the first bonding member thicker only at specific locations where it bonds the plate assembly to the display panel, rather than uniformly increasing the thickness throughout the entire device. This localized thickness increase reduces orange peel phenomenon at critical areas while minimizing the overall impact on device thickness.
Data Source
AI summary
A display apparatus includes a display panel. The display apparatus further includes a backplate disposed below the display panel. The display apparatus further includes a plate assembly disposed below the backplate. The backplate and the plate assembly are coupled by a first bonding member, the display panel and the backplate are coupled by a second bonding member, and the first bonding member is formed to be thicker than the second bonding member.