Curved Compressor Lamination for Flexible Display Curling
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Solution Overview
Problem
Existing lamination technologies for flexible display devices face challenges in maintaining the flexible properties of components and preventing curling after lamination, which affects the appearance and quality of the final product.
Innovation Solution
A lamination apparatus with a compressor having a first surface with a curvature radius exceeding 300 mm, a push rod with a smaller curvature radius, and an actuator that applies force through a screw-coupled rotation shaft to laminate a flexible member and an adhesive layer, ensuring precise alignment and a larger contact area to prevent curling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional lamination apparatus with a flat or small-curvature compressor is used, then the lamination process is simple and quick, but the flexible member curls after lamination and the flexible properties are compromised
Solution Approach 1:
The compressor is designed with a large curvature radius (exceeding 300 mm) to match the curvature of the flexible display panel. This curved surface allows the compressor to conform to the flexible member during lamination, preventing curling after the process while maintaining the flexible properties of the components.
2Area of stationary object
If a push rod with small curvature radius is used, then the push rod can be compact and easy to manufacture, but the contact area with the flexible member is reduced leading to increased curling
Solution Approach 1:
The push rod is designed with a circumferential surface having a curvature radius smaller than that of the compressor but still curved to match the flexible member's geometry. This curved design increases the contact area between the push rod and flexible member during lamination, effectively preventing curling while remaining manufacturable.
3Manufacturing precision
If an actuator with direct linear motion is used, then the actuator structure is simple, but the precision and control of lamination force are insufficient
Solution Approach 1:
The actuator uses a screw mechanism (rotation shaft with external threads) to convert rotational motion into precise linear motion of the push rod. This mechanical substitution provides accurate control over the lamination force and position, ensuring high manufacturing precision while maintaining a relatively simple actuator structure.
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 prevents curling in the flexible display panel assembly, maintaining the flexible properties and appearance quality of the device, and enables the production of high-quality flexible display devices.
Implementation Method 1
a rotation shaft screw-coupled to the through-hole, and a driving source that applies torque to the rotation shaft
Data Source
AI summary
A lamination apparatus for laminating a flexible member and an adhesive layer of a flexible display device includes a compressor including a first surface with a first curvature radius, a push rod connected to the compressor, the push rod having a circumferential surface with a smaller second curvature radius than the first curvature radius of the compressor; and an actuator connected to the push rod, actuator moving the push rod to apply a force for lamination.