Elastic Lamination Seat for Large-Angle OLED Cover Glass Bonding
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Solution Overview
Problem
Current lamination devices are inadequate for reliably and efficiently laminating large-angle glass cover plates onto OLED flexible display panels, as they suffer from poor reliability, stability, and tolerance, leading to high costs and low lamination yield, with existing solutions being either ineffective or costly.
Innovation Solution
A lamination device featuring an elastic lamination seat with a curved bearing surface and an auxiliary bearing film, driven by a mechanism that allows for elastic deformation to gradually laminate the flexible display panel onto the cover plate from the middle to the sides, preventing stress concentration and bubble formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional lamination device is used, then the structure is simple, but it cannot meet the requirement for lamination of large-angle glass cover plates and flexible display panels
Solution Approach 1:
The lamination seat is designed with elastic deformation capability, allowing it to dynamically adapt its shape during the lamination process. The seat can deform to match the curvature of large-angle cover plates, enabling versatile lamination without requiring multiple fixed-geometry fixtures. This dynamic adaptation resolves the contradiction by providing high adaptability through a single, intelligently designed component rather than multiple complex interchangeable parts.
Solution Approach 2:
The lamination seat utilizes changes in physical parameters (elastic deformation, curvature radius) to adapt to different lamination angles. By controlling the degree of elastic deformation and the curvature of the bearing surface, the device can accommodate various cambered angles of cover plates. This parameter-based adaptation allows the device to handle diverse lamination requirements while maintaining a relatively simple overall structure.
2Reliability
If the bearing surface is flat, then the device structure is simple, but it causes stress concentration and bubble formation at corners during lamination
Solution Approach 1:
The bearing surface is designed with a curved geometry that matches the cambered shape of the cover plate and flexible display panel. This curvature distributes the lamination pressure evenly across the entire surface, including the corners, preventing stress concentration and bubble formation. The curved bearing surface eliminates the need for complex additional components by integrating the stress-distribution function directly into the seat's geometry.
3Manufacturing precision
If lamination is performed from sides to middle, then the process is simple, but it results in poor lamination quality and high failure rate
Solution Approach 1:
The lamination process is inverted by starting from the middle of the cover plate and progressing toward the sides, rather than the conventional side-to-middle approach. The elastic lamination seat deforms in a controlled sequence, first contacting and bonding the central region, then progressively expanding to the edges. This inverted lamination sequence ensures proper adhesion and eliminates bubbles by expelling air outward during the process, achieving high manufacturing precision through reversed process logic.
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 provides high reliability, stability, and tolerance for large-angle lamination, improving yield and reducing costs, while allowing for the effective lamination of cover plates with angles up to 150° without causing stress-induced failures or bubbles.
Implementation Method 1
when the driving mechanism drives the elastic lamination seat to move towards the cover plate, the elastic lamination seat is squeezed to produce elastic deformation
Data Source
AI summary
A lamination device includes: an elastic lamination seat, including a deformation bearing portion, the deformation bearing portion including a bearing surface for bearing a to-be-laminated flexible display panel, and the bearing surface being configured as a curved surface protruding towards the cover plate; an auxiliary bearing film, configured to pre-bend and fix the to-be-laminated flexible display panel onto the bearing surface when the elastic lamination seat is in a natural state; and a driving mechanism, connected to the elastic lamination seat and configured to drive the elastic lamination seat to move towards or away from the cover plate, wherein when the driving mechanism drives the elastic lamination seat to move towards the cover plate, the elastic lamination seat is squeezed to produce elastic deformation and the bearing surface gradually laminates the flexible display panel onto the cover plate from the middle to two sides.