Flexible Display Buffer Layer Stress Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display panels face breakage due to poor stress tolerance when bent, as the film layers are easily damaged under tensile or crushing stress, leading to failure of the display.
Innovation Solution
A flexible display design that includes a buffer layer with pixel structures, conductive through holes, a flexible circuit board, and an adhesive layer, where the adhesive layer absorbs most of the bending stress, and the signal lines on the circuit board have higher ductility and consistency to maintain electrical performance during bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible display panels are bent, then the display can be applied to wearable devices, but the film layers are easily broken due to poor stress tolerance
Solution Approach 1:
The patent introduces a buffer layer as an intermediary component between the pixel structures and the flexible substrate. This buffer layer absorbs and distributes the stress generated during bending, preventing direct transmission of mechanical stress to the fragile film layers containing thin film transistors and conductive layers, thereby resolving the contradiction between flexibility and stress tolerance
Solution Approach 2:
The patent employs a composite structure consisting of multiple layers including the buffer layer, pixel structures, flexible substrate, and encapsulation layers. Each layer is designed with specific mechanical and electrical properties, creating a composite system that collectively provides both flexibility for wearable applications and sufficient stress tolerance to prevent film layer breakage during bending
2Shape
If the flexible display panel is bent, then the display achieves flexibility, but part of the film layers are easily broken due to poor stress tolerance
Solution Approach 1:
The buffer layer serves as a mediator that decouples the mechanical deformation of the flexible substrate from the pixel structures. When the display is bent, the buffer layer deforms to accommodate the shape change while protecting the film layers from excessive stress, thus maintaining both bendability and strength
Solution Approach 2:
The patent utilizes a flexible substrate as the base layer that enables the display to be bent into various shapes. Combined with the buffer layer and encapsulation structures, this flexible film system maintains structural integrity and stress tolerance even when deformed, allowing the display to achieve flexibility without compromising the strength of individual film layers
Data Source
AI summary
A flexible display including a buffer layer, a plurality of pixel structures, a plurality of first pads, a plurality of first conductive through holes, a flexible circuit board and an adhesive layer is provided. The pixel structures are disposed on a first surface of the buffer layer. The first pads are disposed on a second surface of the buffer layer. The first conductive through holes are embedded in the buffer layer. The first pads are respectively electrically connected to the pixel structures through the first conductive through holes. The adhesive layer is disposed between the second surface of the buffer layer and the flexible circuit board. An orthogonal projection of the adhesive layer on the buffer layer overlaps an orthogonal projection of the pixel structures on the buffer layer. The first pads are electrically connected to first signal lines of the flexible circuit board.