PDP Filter with Unexposed Shielding Layer Edges
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Solution Overview
Problem
Conventional PDP filters with transparent conductive film type electromagnetic wave-shielding layers require exposed edges for grounding, limiting their laminated structure and manufacturing processes, making mass production and multifunctionality challenging.
Innovation Solution
A PDP filter with a laminated structure where at least two edge portions of the transparent conductive film type electromagnetic wave-shielding layer are not exposed, allowing for a roll-to-roll manufacturing process and integration with other functional layers without the need for grounding, using a method that includes winding and compressing films with compression rollers to form a unified film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If exposed edges are provided for grounding in conventional PDP filters, then electromagnetic wave-shielding performance is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent extracts the grounding function from the edge portions and relocates it to the center region of the transparent conductive film. By forming a ground pattern in the center that connects to the transparent conductive film, the edge portions no longer need to be exposed for grounding purposes, thus simplifying the overall structure while maintaining electromagnetic wave-shielding performance.
Solution Approach 2:
Instead of the conventional approach where grounding is achieved through exposed edges, this patent inverts the grounding arrangement by placing the ground connection in the center region. This inversion allows the edge portions to be covered and integrated with other functional layers, reducing structural complexity.
2Reliability
If exposed edges are required for grounding, then electromagnetic interference shielding is improved, but ease of manufacture deteriorates due to limited lamination options
Solution Approach 1:
The patent enables the transparent conductive film to serve multiple functions: electromagnetic wave shielding through its conductive properties and optical transparency through its material characteristics. The ground pattern in the center region provides grounding functionality while allowing the edge portions to be fully integrated with other functional layers, achieving universal applicability in PDP filter manufacturing.
Solution Approach 2:
The patent merges the grounding function with the center region of the transparent conductive film rather than requiring separate edge exposures. This merging allows all functional layers to be laminated together in a unified structure, significantly improving ease of manufacture through standard lamination processes.
3Reliability
If edge portions are exposed for grounding, then electromagnetic wave-shielding is improved, but productivity decreases due to complex manufacturing processes
Solution Approach 1:
The patent incorporates the ground pattern directly into the transparent conductive film during its formation process, before lamination with other functional layers. This preliminary integration of the grounding structure eliminates subsequent grounding steps and allows all layers to be laminated simultaneously, significantly improving productivity.
Solution Approach 2:
By merging the grounding function into the center region of the transparent conductive film, the patent enables all functional layers to be processed and laminated together in a unified manufacturing flow. This eliminates separate grounding operations and accelerates the overall manufacturing process, enhancing productivity.
4Reliability
If multiple separate functional layers are used for electromagnetic wave-shielding and near infrared absorption, then shielding performance is improved, but device complexity increases
Solution Approach 1:
The patent employs a transparent conductive film that simultaneously provides electromagnetic wave shielding through its conductive properties and maintains optical transparency. The ground pattern in the center region enhances the shielding effectiveness, allowing a single integrated structure to replace multiple separate functional layers, thus reducing device complexity while maintaining comprehensive shielding performance.
Solution Approach 2:
The patent utilizes composite material structures within the transparent conductive film, combining conductive materials with transparent substrates to achieve both electromagnetic wave shielding and optical transparency. This composite approach allows multifunctionality in a single integrated layer, reducing the need for multiple separate functional layers.
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
This approach enables the production of PDP filters with equal cross-sectional widths of functional layers, facilitating mass production and simplifying the manufacturing process while maintaining effective electromagnetic wave-shielding performance without the need for exposed grounding.
Implementation Method 1
a transparent conductive film type electromagnetic wave-shielding layer (214), in which at least two edge portions of a surface of the transparent conductive film type electromagnetic wave-shielding layer (214), which is in contact with other functional layers (220, 750), are not exposed outside the laminated structure of the PDP filter (300)
Implementation Method 2
passing the transparent conductive film type electromagnetic wave-shielding film (210) from the first feed roller (250) and the functional film (220) from the second feed roller (260) through, between the first compression roller (270) and second compression roller (280), thus obtaining a film integrated by heat or pressure
Data Source
AI summary
Disclosed herein is a PDP filter having a laminated structure of a transparent conductive film type electromagnetic wave-shielding layer and one or more other functional layers, in which at least two edge portions of the surface of the transparent conductive film type electromagnetic wave-shielding layer, which is in contact with the functional layer, are not exposed outside the laminated structure of the PDP filter.