Flexible Display Conduction Layer Shielding
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Solution Overview
Problem
Flexible display panels face issues with non-uniform shielding effects due to substrate deformation, wrinkle, uneven thickness, and foreign matter interference, leading to inconsistent display quality and increased thickness, which complicates bending.
Innovation Solution
Incorporating a conduction function layer connected to a constant potential between the flexible substrate and the display function layer, either through a through-hole or an end portion, to effectively shield external interference and prevent smudginess and particle influences, while also serving as a blocking layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding film is disposed on the back side of the flexible substrate to shield external electromagnetic interference, then the shielding effect is improved, but the thickness of the display panel increases and flexibility deteriorates
Solution Approach 1:
The patent combines the shielding function with the conduction layer that is already present in the display structure. By making the conduction layer extend to the edge of the substrate and connecting it to a constant potential, the shielding function is merged into the existing conduction structure, eliminating the need for a separate shielding film and thus avoiding increased thickness.
Solution Approach 2:
The conduction layer is given multiple functions: it serves both as an electrical conduction path and as an electromagnetic shielding layer. This multi-functionality allows the same structural element to address both electrical connectivity and electromagnetic interference shielding, thereby improving shielding effectiveness without adding extra layers that would increase thickness.
2Object-affected harmful factors
If a shielding film is disposed on the back side of the flexible substrate, then external electromagnetic interference is shielded, but non-uniform shielding effect occurs due to substrate deformation, wrinkle, and uneven thickness
Solution Approach 1:
The shielding function is merged with the conduction layer that is inherently part of the display structure. Since the conduction layer is formed as an integral part of the substrate structure rather than as a separate adhered film, it is not affected by substrate deformation, wrinkles, or thickness variations, thereby achieving uniform shielding effect.
Solution Approach 2:
The conduction layer acts as an intermediary between the substrate and the external electromagnetic environment. By being electrically connected to a constant potential, it provides a stable reference that compensates for any physical irregularities in the substrate, ensuring uniform shielding performance across the entire display area.
3Object-affected harmful factors
If a shielding film is adhered to the flexible substrate, then external electromagnetic interference is shielded, but foreign matters such as smudginess and particles remain between the substrate and shielding film, causing non-uniform shielding effect
Solution Approach 1:
The shielding function is merged with the conduction layer that is already integrated into the display structure. This eliminates the need for a separate adhered shielding film, thereby preventing the introduction of foreign matters such as smudginess and particles that would occur during the adhesion process and compromise display uniformity.
4Object-affected harmful factors
If the conduction function layer is disposed between the flexible substrate and the display function layer, then external interference is shielded, but the connection to constant potential must be established through through-hole or end portion
Solution Approach 1:
Instead of creating through-holes through multiple layers to connect the conduction layer to constant potential, the patent inverts the approach by having the conduction layer naturally extend to the edge of the substrate. This edge extension provides a direct connection path to the constant potential, eliminating the need for complex through-hole structures and reducing device complexity.
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 configuration enhances the shielding effectiveness, maintains uniform display quality, and improves the flexibility and bending performance of the display panel by preventing external interference and foreign matter impacts.
Implementation Method 1
By arranging the conduction function layer and connecting to the constant potential, an external interference signal from a back side of the substrate can be effectively shielded
Implementation Method 2
the conduction function layer is connected to a constant potential through a through-hole
Data Source
AI summary
The present disclosure discloses a flexible display panel and a flexible display device. The flexible display panel includes a first flexible substrate, a buffer layer, a display function layer, and a conduction function layer. The buffer layer and the display function layer are placed on a first side of the first flexible substrate. The conduction function layer is placed between the first flexible substrate and the display function layer, and is connected to a constant potential through a through-hole or by an end portion of the conduction function layer. By arranging the conduction function layer and connecting to the constant potential, an external interference signal from a back side of the substrate can be effectively shielded, and the conduction function layer can also serve as a blocking layer.