Curved Bonding Device for Display Panels
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Solution Overview
Problem
There is a growing demand for bonding technologies that can easily bond the bent side portions of supporting plates, display panels, and windows in display devices with curved or flexible designs, as existing methods struggle to effectively manage the curvature and alignment of these components.
Innovation Solution
A bonding device with a stage and a movable pressing part, featuring layers with curved bending portions that are bent with specific curvatures, allowing for sequential bonding of flat and bending portions to prevent bonding failures by ensuring proper alignment and pressure application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bonding methods are used on bent side portions, then bonding can be performed on flat surfaces, but bonding fails or is unreliable on curved surfaces
Solution Approach 1:
The pressing part is designed with different surface characteristics for different regions: a flat pressing surface for bonding flat portions and curved pressing surfaces matching the curvature of bent portions. This local differentiation allows reliable bonding on both flat and curved surfaces by adapting the pressing surface geometry to the specific bonding region.
Solution Approach 2:
The pressing part is configured to be movable, allowing it to apply pressure dynamically to both flat and bent portions during the bonding process. The mobility enables the pressing part to adapt to different geometries and maintain effective contact pressure across varying surface curvatures.
2Manufacturing precision
If flat portions are bonded first, then alignment is easy, but bent portions remain misaligned causing bonding failure
Solution Approach 1:
The bonding process is designed to first bond the flat portions using the flat pressing surface, establishing a stable base alignment. Subsequently, the pressing part moves to bond the bent portions using curved pressing surfaces, ensuring proper alignment is maintained throughout the sequential bonding process.
Solution Approach 2:
The bonding process is divided into distinct stages: first bonding flat portions, then bonding bent portions. The pressing part is also segmented functionally with different surface regions (flat and curved) that engage different portions of the workpiece at different times, enabling systematic alignment and bonding.
3Productivity
If bent portions are bonded simultaneously with flat portions, then processing time is reduced, but alignment errors cause bonding failures
Solution Approach 1:
The bonding process continues without interruption through sequential bonding of flat and bent portions. The pressing part moves continuously from bonding flat portions to bonding bent portions, maintaining productive action throughout while ensuring proper alignment at each stage through the designed surface geometries.
Data Source
AI summary
A bonding device includes: a stage and a pressing part, which is placed on the stage and is movable toward the stage. A first layer, which is disposed on an upper surface of the stage, includes a first flat portion and first bending portions. A second layer, which is disposed below a lower surface of the pressing part, includes a second flat portion and second bending portions. The first and second bending portions may be disposed between the stage and the pressing part, in a state bent with curvatures, respectively. The curvature of a lower surface of each of the second bending portions is smaller than the curvature of an upper surface of each of the first bending portions.