Display Panel Barrier Groove Layout With Pillow Body Overlap
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Solution Overview
Problem
Short-circuit defects frequently occur in the barrier grooves of display panels due to the absorption of water by the organic thin film layer, which is prone to moisture, especially when a conductive layer is applied on the organic thin film layer.
Innovation Solution
The array substrate design includes a first pillow body with a pillow metal block and insulating layer on the driving circuit layer, where the organic thin film layer is defined with a barrier groove, and the conductive layer has a signal wire that overlaps with the pillow body to prevent short-circuits, with specific dimensions and configurations to ensure effective coverage and overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a barrier groove is defined on the organic thin film layer to prevent moisture absorption, then the reliability of the display panel is improved, but short-circuit defects occur in the barrier groove due to the conductive layer preparation
Solution Approach 1:
The patent introduces a pillow body structure as an intermediary element between the organic thin film layer and the conductive layer. This pillow body includes a pillow metal block and a pillow insulating layer, where the insulating layer covers the metal block and extends into the barrier groove. The pillow body acts as a mediator that provides both mechanical support and electrical insulation, preventing short-circuits while maintaining the barrier groove's moisture protection function.
Solution Approach 2:
The patent solves the short-circuit problem by transitioning from a two-dimensional planar structure to a three-dimensional pillow body structure. The pillow body protrudes from the organic thin film layer surface, creating a vertical dimension that allows the conductive layer to be routed around rather than across the barrier groove, thereby eliminating the short-circuit path while maintaining moisture barrier integrity.
2Adaptability or versatility
If a conductive layer is prepared on the organic thin film layer to provide signal transmission, then the functionality of the display panel is improved, but short-circuit defects occur in the barrier groove region
Solution Approach 1:
The patent segments the conductive layer into separate regions by introducing the pillow body structure. The conductive layer is divided into first and second conductive lines that are separated by the pillow body, preventing direct electrical connection across the barrier groove. This segmentation allows signal transmission within each conductive line while eliminating short-circuit risks between adjacent lines in the barrier groove region.
Solution Approach 2:
The pillow insulating layer serves as an intermediary barrier between adjacent conductive lines in the barrier groove region. This insulating layer prevents direct electrical contact between the first and second conductive lines, thereby eliminating short-circuit defects while allowing both conductive lines to maintain their signal transmission functionality.
3Use of energy by moving object
If the organic thin film layer is used to reduce power consumption and enhance display contrast, then the display performance is improved, but the organic thin film layer absorbs water leading to short-circuit defects
Solution Approach 1:
The pillow body structure acts as an intermediary protection layer that preserves the organic thin film layer's low-power characteristics while preventing moisture-induced short-circuits. The pillow insulating layer provides a moisture barrier that protects the underlying conductive structures without requiring changes to the organic thin film layer's energy-efficient properties.
Solution Approach 2:
The patent implements beforehand cushioning by pre-establishing the pillow body structure with its insulating layer before the conductive layer is prepared. This preventive measure cushions against potential short-circuit defects by providing electrical insulation and moisture protection in advance, allowing the organic thin film layer to maintain its power-saving characteristics without risking future short-circuits.
Data Source
AI summary
An array substrate includes a base substrate, a driving circuit layer with a first pillow body on a peripheral region of the array substrate, an organic thin film layer and a conductive layer sequentially stacked; the first pillow body includes a first pillow metal block located on at least one of a source drain metal layer and a gate layer and a first pillow insulating layer covering the first pillow metal block; the organic thin film layer is defined with a barrier groove on the peripheral region, the first pillow body is provided with a part covered by the organic thin film layer and the other part exposed by the barrier groove; the conductive layer is provided with a signal wire passing across an edge of the barrier groove, and an edge of the signal wire at least partially overlaps with the first pillow body.