Concave-Convex Adhesive for Display Panel Level Differences
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Solution Overview
Problem
The existing display devices with OLED panels face issues due to level differences between the features under the display panel, which can lead to visible defects and deterioration of display quality.
Innovation Solution
A display device design that includes a display panel, a panel support, a first circuit board, and an adhesive member with a concave-convex profile, where the adhesive member has varying thickness and width regions to couple the circuit board and panel support, thereby hiding level differences and improving adhesion without sticking or wrinkling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the panel support and circuit board are rigidly coupled, then adhesion strength is improved, but adhesive layer defects (sticking or wrinkling) occur
Solution Approach 1:
The adhesive member is designed with different regions having different properties: a first region with higher adhesion strength for coupling to the circuit board, and a second region with lower adhesion strength to prevent wrinkling. This local differentiation allows the adhesive member to provide strong coupling where needed while maintaining flatness in other areas.
Solution Approach 2:
The adhesive member is divided into multiple regions (first region and second region) with distinct adhesion characteristics. The first region provides strong coupling to the circuit board, while the second region has reduced adhesion to prevent defects, effectively segmenting the adhesive function into specialized zones.
2Ease of manufacture
If a uniform adhesive layer is used, then manufacturing simplicity is maintained, but level differences become visible and display quality deteriorates
Solution Approach 1:
The adhesive member incorporates regions with different thicknesses: a first region with smaller thickness for areas requiring flatness, and a second region with greater thickness for areas needing level adjustment. This local quality variation compensates for underlying level differences while maintaining overall manufacturing simplicity.
3Ease of manufacture
If the adhesive member has constant thickness, then manufacturing is simplified, but adhesion uniformity across different regions is compromised
Solution Approach 1:
The adhesive member is designed with spatially varying thickness: a first region with smaller thickness for strong, uniform adhesion to the circuit board, and a second region with greater thickness for compensating level differences. This local differentiation ensures reliable adhesion uniformity across regions with different requirements.
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
The solution effectively suppresses the visibility of level differences, enhancing display quality by maintaining strong adhesion between the circuit board and panel supports while preventing adhesive layer issues like sticking or wrinkling.
Implementation Method 1
an adhesive member disposed between the panel support and the first circuit board and including a concave-convex profile on a first surface facing the panel support. The first circuit board and the panel support are at least partially coupled with each other by the adhesive member.
Data Source
AI summary
A display device including a display panel; a panel support disposed on a lower surface of the display panel; a first circuit board connected to the display panel and disposed such that it overlaps with a lower surface of the panel support; and an adhesive member disposed between the panel support and the first circuit board and including a concave-convex profile on a first surface facing the panel support. The first circuit board and the panel support are at least partially coupled with each other by the adhesive member.