Foldable Bezel Circuit Layout for Narrow-Bezel Flexible Display Panels
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Solution Overview
Problem
Existing flexible OLED display panels face challenges in achieving a narrow bezel design due to the width of the bezel circuit, which affects the seamless splicing and display effect when tiled, leading to increased non-display area and reduced image continuity.
Innovation Solution
The flexible display panel incorporates a bezel circuit design with portions located in a foldable region, allowing the bezel circuit to be folded towards the non-display side, along with signal lines and circuit groups, reducing the bezel width and enabling seamless splicing of tiled displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bezel circuit is disposed in the peripheral area with sufficient width, then the circuit can function reliably, but the bezel width increases and seamless splicing becomes difficult
Solution Approach 1:
The bezel circuit is segmented into two parts: a first bezel circuit in the bendable region and a second bezel circuit in the foldable region. This segmentation allows the circuit functionality to be distributed across different structural zones, enabling the overall bezel width to be reduced while maintaining reliable circuit operation through the folded configuration.
Solution Approach 2:
The bezel circuit extends into the foldable region and is folded towards the non-display side, utilizing the third dimension (folded depth) to accommodate circuit space that would otherwise require horizontal bezel width. This dimensional transition reduces the lateral bezel width while preserving circuit functionality.
2Length of stationary object
If the bezel width is reduced for narrow bezel design, then seamless splicing is improved, but the bezel circuit space becomes insufficient
Solution Approach 1:
The bezel circuit utilizes the foldable region and folds towards the non-display side, transitioning from a two-dimensional planar layout to a three-dimensional folded structure. This allows sufficient circuit space to be accommodated within a narrow bezel width by exploiting the folded depth dimension.
Solution Approach 2:
The bezel circuit is nested within the foldable region structure, where the circuit traces are folded back towards the non-display side. This nesting approach allows the circuit to occupy space that is structurally integrated into the foldable region rather than requiring separate dedicated circuit areas.
3Device complexity
If the bezel circuit is placed entirely in the bendable region, then the structure is simpler, but the bezel width increases and tiled display splicing is affected
Solution Approach 1:
The bezel circuit is divided into a first portion in the bendable region and a second portion in the foldable region. This segmentation enables the circuit to extend into the foldable region where it can be folded towards the non-display side, thereby reducing the lateral bezel width required while maintaining circuit functionality.
Solution Approach 2:
The bezel circuit incorporates a foldable region with fold lines that enable dynamic folding towards the non-display side. This dynamic structural feature allows the circuit to adapt its spatial configuration, reducing the static bezel width while maintaining adequate circuit space through the folded state.
Data Source
AI summary
A flexible display panel has a display area and a peripheral area located around the display area. The peripheral area includes at least one bendable region and a foldable region located on a side of each bendable region away from the display area. The flexible display panel includes a flexible substrate, and a bezel circuit that is disposed on the flexible substrate and located in the peripheral area. At least a portion of the bezel circuit is located in the foldable area. A portion of the flexible display panel located in the foldable region is configured to be folded toward a direction away from a display side of the flexible display panel through a portion of the flexible display panel located in the bendable region.