Window Bonding Apparatus for Flexible Display Panels
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Solution Overview
Problem
Flexible display panels often experience issues with bubble formation and poor bonding when attaching a protective window, due to misalignment and flexibility, which are not significant concerns with rigid panels.
Innovation Solution
A window bonding apparatus that progressively increases contact area between a resiliently supported flexible display panel and a protective window using a combination of a display panel supporter, holding member, and jigs to ensure conformal bonding without bubbles, utilizing a display panel supporter that can be arched and holding members to manage alignment and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a liquid adhesive layer is coated onto the display panel and the window is bonded under normal pressure, then the bonding process is simple, but bubbles are formed in the adhesive layer causing poor bonding quality
Solution Approach 1:
The display panel supporter is designed to be dynamically changeable between a flat state and an arched state. During bonding, it transitions to an arched state to progressively increase contact area between the window and display panel, preventing bubble formation. After bonding, it returns to a flat state for easy removal of the bonded assembly.
Solution Approach 2:
The curvature of the display panel supporter is changed from flat to arched by applying a predetermined force through the holding member. This parameter change enables progressive contact area increase during bonding, eliminating bubbles while maintaining process simplicity.
2Adaptability or versatility
If the display panel is made flexible to enable bending applications, then adaptability is improved, but alignment between the display panel and window becomes difficult causing poor bonding
Solution Approach 1:
The display panel supporter is configured to form an arch with a predetermined radius of curvature when force is applied. This curvature enables progressive contact between the flexible display panel and the window, ensuring precise alignment and preventing misalignment issues while maintaining panel flexibility.
Solution Approach 2:
The display panel supporter acts as an intermediary between the flexible display panel and the rigid window. By controlling the supporter's curvature, precise alignment is achieved during bonding without compromising the flexibility of the display panel.
3Stability of the object's composition
If the display panel supporter is made rigid to maintain stability, then stability is improved, but the ability to progressively increase contact area is reduced causing bubble formation
Solution Approach 1:
The display panel supporter is designed with dynamic properties, allowing it to transition between flat and arched states. In the arched state, it provides the necessary flexibility to progressively increase contact area and eliminate bubbles, while maintaining stability during each bonding phase.
Solution Approach 2:
The physical state of the display panel supporter is changed from flat to arched by applying force through the holding member. This parameter change enables bubble-free bonding by progressively increasing contact area, while the supporter maintains sufficient stability to support the bonding process.
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 achieves a bubble-free and well-aligned bonding interface between the flexible display panel and the window, improving the quality of the bonding process and preventing bubble formation in the adhesive layer.
Implementation Method 1
a display panel supporter configured to resiliently support thereon a less stiff and flexible display panel
Implementation Method 2
a liquid adhesive layer is typically coated onto the display panel, and then the window and the display panel are bonded to each other under normal pressure and the adhesive layer is cured (solidified)
Data Source
AI summary
A window bonding apparatus is provided. The window bonding apparatus includes a resilient display panel supporter supporting a flexible display panel thereon, a holding member supporting and squeezing inwardly opposed ends of the display panel supporter so as to attain a desired degree of curvature, a first jig disposed under the display panel supporter and having a rigid first face with which the bottom face of the display panel supporter comes into contact when pressed from above, and a second jig disposed above the display panel supporter and having a second face to which the window is releaseably attached, the second jig being movable toward the display panel, wherein the second jig is moved to the first jig to attach the window to the display panel in a manner which progressively increases contact area between the window and the display panel.